Metabolism of water-soluble vitamins and cofactors (Homo sapiens)

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27, 454, 11816, 64, 98, 1012325, 66, 90, 104, 106...198, 33, 81, 84, 11233, 7614, 771207311931616526, 59, 72, 886, 30, 79, 83, 92...51, 12143, 108, 114-11613, 39, 479, 44349, 859112, 37, 4134, 9326, 59, 72, 8852, 67, 78769, 7038715896642, 111794010211, 20, 22, 46, 55...28, 8266, 90, 106, 10769, 7028, 82, 902, 121, 12224, 63, 879126, 53, 59, 72, 80...2424, 63, 8757, 1031049, 8532, 54, 5626, 59, 8862, 99751836, 12397, 11117, 60, 1173117, 60, 86, 11724, 63, 8748, 86613549, 8532, 54, 566115, 26, 59, 72, 8810213, 21, 39, 47, 58...6850, 1241, 1096682926, 53, 59, 72, 80...12, 37, 41, 1006293, 102121mitochondrial matrixendosomemitochondrial matrixmitochondrial matrixlysosomal lumenendosomelysosomal lumencytosolcytosolperoxisomal matrixmitochondrial intermembrane spaceCysS452-MOCS3 RFK L-CysBCTNTCN1ATPADPMn2+ MCCC1 CTRB2(19-31) CYB5A:hemecob(I)alamin threonate3xGPHN:3xMg2+TCN1 2xMMAA:2xMUTPantetheineMTR unknowncob(II)alaminreductaseMoCo6x(Btn-PCCA:PCCB)NAD+(4Fe-4S)(2+) MUT TCII:CblMTRR:MTRTCN1:CblNa+GTPFMNAdoMetMMACHC:cob(II)alaminPCCA CYB5A:ferrihemeL-AlaH2OH2O23xPPCDC:3xFMNNADHBtn-ACACB AMPunknown peptidaseMTR MyrG-CYB5R3(2-301) CTRB1(19-31) PPANTPAP5-methyl-THFH+SLC23A1,2ATPMn2+ MCCC2 CTRB2(167-263) Btn-PC DP-CoAADPATPRIBATPPRSS1,3,CTRB1,2AMPGIF:CblMTR MeCbl Zn2+ CD320FAD MoO4(2-)PPPSLC5A6 TCII:CblSLC2A1 RIBTCN1 MTRR:MTR(cob(I)alamin)ENPP2 Metabolism of folateand pterinesBtnMPT O2hCBXsATPCbl H2Ounknown peptidaseunknown proteaseNa+Zn2+ MMACHC:MMADHC:cob(II)alaminMn2+ Btn-ACACA Na+Btn-ACACB:2Mn2+VNN2 H2OAscH-SUCC-CoACblPPiMMAB AMPPXLPCCB ADPFeHM H2OPDXPCbl AMPMCCC2 PANK3 H2OCbl Food proteinsCYB5A H2O2heme MMACHCBtn-ACACA:2Mn2+PPiCTRB1(34-164) FAD ATPCoA-SHENPP1 CNCblBtn-PC FMN CUBN BTDGSHcob(II)alamin GSTO dimersH+ADPMOCS1A H+PPiH+SLC19A2/3CYB5R3:FADPDZD11 MMAA ADP2xMOCS2A:2xMOCS2BH2OVNN1 Cbl3xMMABPPiPRSS1(16-18)ACACB SLC19A3 PCCB NADPH2xAOX1:cofactorsATPPDXateCTRB1(167-263) Cbl holo-MOCS1Cbl TPK1 PiL-LysAMPZn2+ BtnFood proteins:CblTCN1Zn2+ ACP5 MMACHC Mg2+ THTPA:Mg2+PAPO2ACACA SOG-MOCS2 TCII2xTRAPAdoHcyCD320 H2OMg2+ MPTAMPCblMTRR:MTR(MeCbl)SLC2A3 ATPGIF HLCS2xENPP1MTR Cbl ADPPrecursor ZoxalateGSTO2 FAD THFL-AlaAdoCbl PXAPMn2+ Mn2+ ATPBtn-PC PRSS3 cob(I)alaminTHMNMOCS1-1 Mn2+ sulfurated MoCoL-CysCUBN Cbl Na+Cbl FASNMg2+ MMAA HLCSSLC52A1,2,3ERUTCN2 FMN Btn-MCCC1 H+GIF AdoMetPPiMOCS2 MOCS2 ATPFAD GSSGGIF:CblATP(4Fe-4S)(2+) PXLP-K258-NFS1-2dimerNH4+PPiATPLMBRD1ATPMOCS3 H2OHCNCUBN:AMNMMACHC:MMADHCBCTNZn2+ PiCOASYAscH-MUT MMADHCABCC1PPanKATPNADHSLC25A19CUBN:AMN:GIF:CblPPiTCII:CblPXLP-K264-MOCOSGPHN MOCS3-S-S(1-):Zn2+6x(Btn-MCCC1:MCCC2)Mg2+ CUBN:AMNH2OENPP1 AOX1 SLC25A16FMN MCCC2 Zn2+ SLC52A3 GIFSLC5A6:PDZD11FLAD1PC ADPFAD 2AETPXA2xPNPO:2xFMNSLC5A6:PDZD11AASDHPPTPCCB L-Met2xPPCSZn2+ SLC19A2 Btn-MCCC1 BtnMOCS3:Zn2+ (red.)cob(II)alaminhCBXsMTRR FMN PDXK CoA-SHAMPGSTO1 H2OFADPPiNADP+SLC23A1 PRSS1(24-247) SLC2A1,3TCN1:CblH2OAMN MMACHC L-MetL-MM-CoAL-CysFAD ThDPCoA-SHcob(II)alaminFADATPMOCS3:Zn2+ (ox.)Btn-PCCA Cbl GIF PanK6x(PCCA:PCCB)2xTPK1:Mg2+Btn-PCCA cob(II)alamin MTRR:MTR(cob(II)alamin)MOCS2 DeHAATPAMPMMADHC Cbl MCCC2 ATPAMN MTRR PPCS PPiBtn-PCCA H2O2ThDPCTRB2(34-164) SLC52A1 AMPSOG-MOCS24x(PC:Mn2+)2xMMAA:2xMUT:AdoCblTHMNVNN1,VNN2CblHCYSPPiBtn-MCCC1 PXLP-K258-NFS1-2 PRSS1(16-247)ACACB:2Mn2+L-LysACACA:2Mn2+H2OATPNADPHAdoCblCYB5A CTRC2xMOCS2-CO-S(1-):2xMOCS2BTDPKNa+H2OFMNThTPABCD4NicotinatemetabolismMMACHC PPCDC PDXAMPTCII:Cbl:CD320H+TCII 2,3-DKGPANK4 PiBCTNPPANTMn2+ CO2ATP4x(Btn-PC:Mn2+)NADP+H2ONa+Mn2+ Cbl MTRR ADPENPP3 BTDBtnTHTPA SLC23A2 DeHAPANK2(111-570)6xMCCC1:6xMCCC2ATPH+unknown peptidasedADEPiPCCB GIF Food proteins PDZD11 Asc.-GIF:CblMMADHC PPiMOCS3 ADPNAD+2xENPP1, 2xENPP2,2xENPP3SLC5A6 CblTCN2 PANK1/3/4SLC52A2 PNPO MOCS22xPDXK:2xZn2+MTRR RFK:Mg2+FASNPRSS1(19-247)PXLPZn2+ PPCCUBN AMN TCII ATPPANK1 PanKFMN FMN cob(II)alamin


Description

Vitamins are a diverse group of organic compounds, required in small amounts in the diet. They have distinct biochemical roles, often as coenzymes, and are either not synthesized or synthesized only in limited amounts by human cells. Vitamins are classified according to their solubility, either fat-soluble or water-soluble. The physiological processes dependent on vitamin-requiring reactions include many aspects of intermediary metabolism, vision, bone formation, and blood coagulation, and vitamin deficiencies are associated with a correspondingly diverse and severe group of diseases.

Water-soluble vitamins include ascorbate (vitamin C) and the members of the B group: thiamin (vitamin B1), riboflavin (B2), niacin (B3), pantothenate (B5), pyridoxine (B6), biotin (B7), folate (B9), and cobalamin (B12). Metabolic processes annotated here include the synthesis of thiamin pyrophosphate (TPP) from thiamin (B1), the synthesis of FMN and FAD from riboflavin (B2), the synthesis of nicotinic acid (niacin - B3) from tryptophan, the synthesis of Coenzyme A from pantothenate (B5), and features of the metabolism of folate (B9). View original pathway at Reactome.</div>

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Reactome-Converter 
Pathway is converted from Reactome ID: 196849
Reactome-version 
Reactome version: 75
Reactome Author 
Reactome Author: Jassal, Bijay

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  1. Board PG, Coggan M, Chelvanayagam G, Easteal S, Jermiin LS, Schulte GK, Danley DE, Hoth LR, Griffor MC, Kamath AV, Rosner MH, Chrunyk BA, Perregaux DE, Gabel CA, Geoghegan KF, Pandit J.; ''Identification, characterization, and crystal structure of the Omega class glutathione transferases.''; PubMed Europe PMC Scholia
  2. Quadros EV, Rothenberg SP, Pan YC, Stein S.; ''Purification and molecular characterization of human transcobalamin II.''; PubMed Europe PMC Scholia
  3. Goding JW, Grobben B, Slegers H.; ''Physiological and pathophysiological functions of the ecto-nucleotide pyrophosphatase/phosphodiesterase family.''; PubMed Europe PMC Scholia
  4. Kim J, Gherasim C, Banerjee R.; ''Decyanation of vitamin B12 by a trafficking chaperone.''; PubMed Europe PMC Scholia
  5. Du J, Cullen JJ, Buettner GR.; ''Ascorbic acid: chemistry, biology and the treatment of cancer.''; PubMed Europe PMC Scholia
  6. Fyfe JC, Madsen M, Højrup P, Christensen EI, Tanner SM, de la Chapelle A, He Q, Moestrup SK.; ''The functional cobalamin (vitamin B12)-intrinsic factor receptor is a novel complex of cubilin and amnionless.''; PubMed Europe PMC Scholia
  7. Maras B, Barra D, Duprè S, Pitari G.; ''Is pantetheinase the actual identity of mouse and human vanin-1 proteins?''; PubMed Europe PMC Scholia
  8. Johnson MA, Kuo YM, Westaway SK, Parker SM, Ching KH, Gitschier J, Hayflick SJ.; ''Mitochondrial localization of human PANK2 and hypotheses of secondary iron accumulation in pantothenate kinase-associated neurodegeneration.''; PubMed Europe PMC Scholia
  9. Hänzelmann P, Schwarz G, Mendel RR.; ''Functionality of alternative splice forms of the first enzymes involved in human molybdenum cofactor biosynthesis.''; PubMed Europe PMC Scholia
  10. Hartmann T, Terao M, Garattini E, Teutloff C, Alfaro JF, Jones JP, Leimkühler S.; ''The impact of single nucleotide polymorphisms on human aldehyde oxidase.''; PubMed Europe PMC Scholia
  11. Labay V, Raz T, Baron D, Mandel H, Williams H, Barrett T, Szargel R, McDonald L, Shalata A, Nosaka K, Gregory S, Cohen N.; ''Mutations in SLC19A2 cause thiamine-responsive megaloblastic anaemia associated with diabetes mellitus and deafness.''; PubMed Europe PMC Scholia
  12. Wang H, Huang W, Fei YJ, Xia H, Yang-Feng TL, Leibach FH, Devoe LD, Ganapathy V, Prasad PD.; ''Human placental Na+-dependent multivitamin transporter. Cloning, functional expression, gene structure, and chromosomal localization.''; PubMed Europe PMC Scholia
  13. Wolthers KR, Scrutton NS.; ''Cobalamin uptake and reactivation occurs through specific protein interactions in the methionine synthase-methionine synthase reductase complex.''; PubMed Europe PMC Scholia
  14. Hannibal L, Kim J, Brasch NE, Wang S, Rosenblatt DS, Banerjee R, Jacobsen DW.; ''Processing of alkylcobalamins in mammalian cells: A role for the MMACHC (cblC) gene product.''; PubMed Europe PMC Scholia
  15. Xiang S, Tong L.; ''Crystal structures of human and Staphylococcus aureus pyruvate carboxylase and molecular insights into the carboxyltransfer reaction.''; PubMed Europe PMC Scholia
  16. Rajan DP, Huang W, Dutta B, Devoe LD, Leibach FH, Ganapathy V, Prasad PD.; ''Human placental sodium-dependent vitamin C transporter (SVCT2): molecular cloning and transport function.''; PubMed Europe PMC Scholia
  17. Mah W, Deme JC, Watkins D, Fung S, Janer A, Shoubridge EA, Rosenblatt DS, Coulton JW.; ''Subcellular location of MMACHC and MMADHC, two human proteins central to intracellular vitamin B(12) metabolism.''; PubMed Europe PMC Scholia
  18. Stallmeyer B, Schwarz G, Schulze J, Nerlich A, Reiss J, Kirsch J, Mendel RR.; ''The neurotransmitter receptor-anchoring protein gephyrin reconstitutes molybdenum cofactor biosynthesis in bacteria, plants, and mammalian cells.''; PubMed Europe PMC Scholia
  19. Shah NP, Beech CM, Sturm AC, Tanner SM.; ''Investigation of the ABC transporter MRP1 in selected patients with presumed defects in vitamin B12 absorption.''; PubMed Europe PMC Scholia
  20. Fleming JC, Tartaglini E, Steinkamp MP, Schorderet DF, Cohen N, Neufeld EJ.; ''The gene mutated in thiamine-responsive anaemia with diabetes and deafness (TRMA) encodes a functional thiamine transporter.''; PubMed Europe PMC Scholia
  21. Wilson A, Leclerc D, Rosenblatt DS, Gravel RA.; ''Molecular basis for methionine synthase reductase deficiency in patients belonging to the cblE complementation group of disorders in folate/cobalamin metabolism.''; PubMed Europe PMC Scholia
  22. Subramanian VS, Marchant JS, Said HM.; ''Targeting and trafficking of the human thiamine transporter-2 in epithelial cells.''; PubMed Europe PMC Scholia
  23. Hayman AR, Warburton MJ, Pringle JA, Coles B, Chambers TJ.; ''Purification and characterization of a tartrate-resistant acid phosphatase from human osteoclastomas.''; PubMed Europe PMC Scholia
  24. Chandler CS, Ballard FJ.; ''Distribution and degradation of biotin-containing carboxylases in human cell lines.''; PubMed Europe PMC Scholia
  25. Takahashi-Íñiguez T, García-Arellano H, Trujillo-Roldán MA, Flores ME.; ''Protection and reactivation of human methylmalonyl-CoA mutase by MMAA protein.''; PubMed Europe PMC Scholia
  26. Ingaramo M, Beckett D.; ''Selectivity in post-translational biotin addition to five human carboxylases.''; PubMed Europe PMC Scholia
  27. Siu VM, Ratko S, Prasad AN, Prasad C, Rupar CA.; ''Amish microcephaly: Long-term survival and biochemical characterization.''; PubMed Europe PMC Scholia
  28. Leal NA, Park SD, Kima PE, Bobik TA.; ''Identification of the human and bovine ATP:Cob(I)alamin adenosyltransferase cDNAs based on complementation of a bacterial mutant.''; PubMed Europe PMC Scholia
  29. Brizio C, Galluccio M, Wait R, Torchetti EM, Bafunno V, Accardi R, Gianazza E, Indiveri C, Barile M.; ''Over-expression in Escherichia coli and characterization of two recombinant isoforms of human FAD synthetase.''; PubMed Europe PMC Scholia
  30. Aminoff M, Carter JE, Chadwick RB, Johnson C, Gräsbeck R, Abdelaal MA, Broch H, Jenner LB, Verroust PJ, Moestrup SK, de la Chapelle A, Krahe R.; ''Mutations in CUBN, encoding the intrinsic factor-vitamin B12 receptor, cubilin, cause hereditary megaloblastic anaemia 1.''; PubMed Europe PMC Scholia
  31. Leclerc D, Campeau E, Goyette P, Adjalla CE, Christensen B, Ross M, Eydoux P, Rosenblatt DS, Rozen R, Gravel RA.; ''Human methionine synthase: cDNA cloning and identification of mutations in patients of the cblG complementation group of folate/cobalamin disorders.''; PubMed Europe PMC Scholia
  32. Wolf B, Jensen K.; ''Evolutionary conservation of biotinidase: implications for the enzyme's structure and subcellular localization.''; PubMed Europe PMC Scholia
  33. Leonardi R, Rock CO, Jackowski S, Zhang YM.; ''Activation of human mitochondrial pantothenate kinase 2 by palmitoylcarnitine.''; PubMed Europe PMC Scholia
  34. Gailus S, Höhne W, Gasnier B, Nürnberg P, Fowler B, Rutsch F.; ''Insights into lysosomal cobalamin trafficking: lessons learned from cblF disease.''; PubMed Europe PMC Scholia
  35. Batra J, Szabó A, Caulfield TR, Soares AS, Sahin-Tóth M, Radisky ES.; ''Long-range electrostatic complementarity governs substrate recognition by human chymotrypsin C, a key regulator of digestive enzyme activation.''; PubMed Europe PMC Scholia
  36. Srikumar K, Premalatha R.; ''Effect of gastrointestinal proteases on purified human intrinsic factor-vitamin B12 (IF-B12) complex.''; PubMed Europe PMC Scholia
  37. Prasad PD, Wang H, Huang W, Fei YJ, Leibach FH, Devoe LD, Ganapathy V.; ''Molecular and functional characterization of the intestinal Na+-dependent multivitamin transporter.''; PubMed Europe PMC Scholia
  38. Joshi AK, Zhang L, Rangan VS, Smith S.; ''Cloning, expression, and characterization of a human 4'-phosphopantetheinyl transferase with broad substrate specificity.''; PubMed Europe PMC Scholia
  39. Wolthers KR, Lou X, Toogood HS, Leys D, Scrutton NS.; ''Mechanism of coenzyme binding to human methionine synthase reductase revealed through the crystal structure of the FNR-like module and isothermal titration calorimetry.''; PubMed Europe PMC Scholia
  40. Belli SI, Goding JW.; ''Biochemical characterization of human PC-1, an enzyme possessing alkaline phosphodiesterase I and nucleotide pyrophosphatase activities.''; PubMed Europe PMC Scholia
  41. Nabokina SM, Subramanian VS, Said HM.; ''Association of PDZ-containing protein PDZD11 with the human sodium-dependent multivitamin transporter.''; PubMed Europe PMC Scholia
  42. Strauss E, Zhai H, Brand LA, McLafferty FW, Begley TP.; ''Mechanistic studies on phosphopantothenoylcysteine decarboxylase: trapping of an enethiolate intermediate with a mechanism-based inactivating agent.''; PubMed Europe PMC Scholia
  43. Yonezawa A, Masuda S, Katsura T, Inui K.; ''Identification and functional characterization of a novel human and rat riboflavin transporter, RFT1.''; PubMed Europe PMC Scholia
  44. Hänzelmann P, Hernández HL, Menzel C, García-Serres R, Huynh BH, Johnson MK, Mendel RR, Schindelin H.; ''Characterization of MOCS1A, an oxygen-sensitive iron-sulfur protein involved in human molybdenum cofactor biosynthesis.''; PubMed Europe PMC Scholia
  45. Kang J, Samuels DC.; ''The evidence that the DNC (SLC25A19) is not the mitochondrial deoxyribonucleotide carrier.''; PubMed Europe PMC Scholia
  46. Ashokkumar B, Vaziri ND, Said HM.; ''Thiamin uptake by the human-derived renal epithelial (HEK-293) cells: cellular and molecular mechanisms.''; PubMed Europe PMC Scholia
  47. Wolthers KR, Scrutton NS.; ''Protein interactions in the human methionine synthase-methionine synthase reductase complex and implications for the mechanism of enzyme reactivation.''; PubMed Europe PMC Scholia
  48. Stucki M, Coelho D, Suormala T, Burda P, Fowler B, Baumgartner MR.; ''Molecular mechanisms leading to three different phenotypes in the cblD defect of intracellular cobalamin metabolism.''; PubMed Europe PMC Scholia
  49. Lee HS, Moon BJ, Choi SY, Kwon OS.; ''Human pyridoxal kinase: overexpression and properties of the recombinant enzyme.''; PubMed Europe PMC Scholia
  50. Nosaka K, Onozuka M, Kakazu N, Hibi S, Nishimura H, Nishino H, Abe T.; ''Isolation and characterization of a human thiamine pyrophosphokinase cDNA.''; PubMed Europe PMC Scholia
  51. Quadros EV.; ''Advances in the understanding of cobalamin assimilation and metabolism.''; PubMed Europe PMC Scholia
  52. Quadros EV, Lai SC, Nakayama Y, Sequeira JM, Hannibal L, Wang S, Jacobsen DW, Fedosov S, Wright E, Gallagher RC, Anastasio N, Watkins D, Rosenblatt DS.; ''Positive newborn screen for methylmalonic aciduria identifies the first mutation in TCblR/CD320, the gene for cellular uptake of transcobalamin-bound vitamin B(12).''; PubMed Europe PMC Scholia
  53. Abu-Elheiga L, Brinkley WR, Zhong L, Chirala SS, Woldegiorgis G, Wakil SJ.; ''The subcellular localization of acetyl-CoA carboxylase 2.''; PubMed Europe PMC Scholia
  54. Wolf B, Grier RE, Allen RJ, Goodman SI, Kien CL.; ''Biotinidase deficiency: the enzymatic defect in late-onset multiple carboxylase deficiency.''; PubMed Europe PMC Scholia
  55. Diaz GA, Banikazemi M, Oishi K, Desnick RJ, Gelb BD.; ''Mutations in a new gene encoding a thiamine transporter cause thiamine-responsive megaloblastic anaemia syndrome.''; PubMed Europe PMC Scholia
  56. Cole H, Reynolds TR, Lockyer JM, Buck GA, Denson T, Spence JE, Hymes J, Wolf B.; ''Human serum biotinidase. cDNA cloning, sequence, and characterization.''; PubMed Europe PMC Scholia
  57. Wuebbens MM, Rajagopalan KV.; ''Mechanistic and mutational studies of Escherichia coli molybdopterin synthase clarify the final step of molybdopterin biosynthesis.''; PubMed Europe PMC Scholia
  58. Wilson A, Platt R, Wu Q, Leclerc D, Christensen B, Yang H, Gravel RA, Rozen R.; ''A common variant in methionine synthase reductase combined with low cobalamin (vitamin B12) increases risk for spina bifida.''; PubMed Europe PMC Scholia
  59. Hiratsuka M, Sakamoto O, Li X, Suzuki Y, Aoki Y, Narisawa K.; ''Identification of holocarboxylase synthetase (HCS) proteins in human placenta.''; PubMed Europe PMC Scholia
  60. Deme JC, Miousse IR, Plesa M, Kim JC, Hancock MA, Mah W, Rosenblatt DS, Coulton JW.; ''Structural features of recombinant MMADHC isoforms and their interactions with MMACHC, proteins of mammalian vitamin B12 metabolism.''; PubMed Europe PMC Scholia
  61. Simpson GL, Ortwerth BJ.; ''The non-oxidative degradation of ascorbic acid at physiological conditions.''; PubMed Europe PMC Scholia
  62. Shirabe K, Landi MT, Takeshita M, Uziel G, Fedrizzi E, Borgese N.; ''A novel point mutation in a 3' splice site of the NADH-cytochrome b5 reductase gene results in immunologically undetectable enzyme and impaired NADH-dependent ascorbate regeneration in cultured fibroblasts of a patient with type II hereditary methemoglobinemia.''; PubMed Europe PMC Scholia
  63. Hymes J, Wolf B.; ''Human biotinidase isn't just for recycling biotin.''; PubMed Europe PMC Scholia
  64. Wang H, Dutta B, Huang W, Devoe LD, Leibach FH, Ganapathy V, Prasad PD.; ''Human Na(+)-dependent vitamin C transporter 1 (hSVCT1): primary structure, functional characteristics and evidence for a non-functional splice variant.''; PubMed Europe PMC Scholia
  65. Nishino K, Itokawa Y, Nishino N, Piros K, Cooper JR.; ''Enzyme system involved in the synthesis of thiamin triphosphate. I. Purification and characterization of protein-bound thiamin diphosphate: ATP phosphoryltransferase.''; PubMed Europe PMC Scholia
  66. Jansen R, Kalousek F, Fenton WA, Rosenberg LE, Ledley FD.; ''Cloning of full-length methylmalonyl-CoA mutase from a cDNA library using the polymerase chain reaction.''; PubMed Europe PMC Scholia
  67. Quadros EV, Nakayama Y, Sequeira JM.; ''The binding properties of the human receptor for the cellular uptake of vitamin B12.''; PubMed Europe PMC Scholia
  68. Marelja Z, Stöcklein W, Nimtz M, Leimkühler S.; ''A novel role for human Nfs1 in the cytoplasm: Nfs1 acts as a sulfur donor for MOCS3, a protein involved in molybdenum cofactor biosynthesis.''; PubMed Europe PMC Scholia
  69. Aghajanian S, Worrall DM.; ''Identification and characterization of the gene encoding the human phosphopantetheine adenylyltransferase and dephospho-CoA kinase bifunctional enzyme (CoA synthase).''; PubMed Europe PMC Scholia
  70. Zhyvoloup A, Nemazanyy I, Panasyuk G, Valovka T, Fenton T, Rebholz H, Wang ML, Foxon R, Lyzogubov V, Usenko V, Kyyamova R, Gorbenko O, Matsuka G, Filonenko V, Gout IT.; ''Subcellular localization and regulation of coenzyme A synthase.''; PubMed Europe PMC Scholia
  71. Karthikeyan S, Zhou Q, Mseeh F, Grishin NV, Osterman AL, Zhang H.; ''Crystal structure of human riboflavin kinase reveals a beta barrel fold and a novel active site arch.''; PubMed Europe PMC Scholia
  72. Suzuki Y, Yang X, Aoki Y, Kure S, Matsubara Y.; ''Mutations in the holocarboxylase synthetase gene HLCS.''; PubMed Europe PMC Scholia
  73. Lakaye B, Makarchikov AF, Antunes AF, Zorzi W, Coumans B, De Pauw E, Wins P, Grisar T, Bettendorff L.; ''Molecular characterization of a specific thiamine triphosphatase widely expressed in mammalian tissues.''; PubMed Europe PMC Scholia
  74. Said HM, Balamurugan K, Subramanian VS, Marchant JS.; ''Expression and functional contribution of hTHTR-2 in thiamin absorption in human intestine.''; PubMed Europe PMC Scholia
  75. Ichida K, Matsumura T, Sakuma R, Hosoya T, Nishino T.; ''Mutation of human molybdenum cofactor sulfurase gene is responsible for classical xanthinuria type II.''; PubMed Europe PMC Scholia
  76. Prohl C, Pelzer W, Diekert K, Kmita H, Bedekovics T, Kispal G, Lill R.; ''The yeast mitochondrial carrier Leu5p and its human homologue Graves' disease protein are required for accumulation of coenzyme A in the matrix.''; PubMed Europe PMC Scholia
  77. Lerner-Ellis JP, Tirone JC, Pawelek PD, Doré C, Atkinson JL, Watkins D, Morel CF, Fujiwara TM, Moras E, Hosack AR, Dunbar GV, Antonicka H, Forgetta V, Dobson CM, Leclerc D, Gravel RA, Shoubridge EA, Coulton JW, Lepage P, Rommens JM, Morgan K, Rosenblatt DS.; ''Identification of the gene responsible for methylmalonic aciduria and homocystinuria, cblC type.''; PubMed Europe PMC Scholia
  78. Quadros EV, Nakayama Y, Sequeira JM.; ''The protein and the gene encoding the receptor for the cellular uptake of transcobalamin-bound cobalamin.''; PubMed Europe PMC Scholia
  79. Mathews FS, Gordon MM, Chen Z, Rajashankar KR, Ealick SE, Alpers DH, Sukumar N.; ''Crystal structure of human intrinsic factor: cobalamin complex at 2.6-A resolution.''; PubMed Europe PMC Scholia
  80. Weatherly SC, Volrath SL, Elich TD.; ''Expression and characterization of recombinant fungal acetyl-CoA carboxylase and isolation of a soraphen-binding domain.''; PubMed Europe PMC Scholia
  81. Hörtnagel K, Prokisch H, Meitinger T.; ''An isoform of hPANK2, deficient in pantothenate kinase-associated neurodegeneration, localizes to mitochondria.''; PubMed Europe PMC Scholia
  82. Fan C, Bobik TA.; ''Functional characterization and mutation analysis of human ATP:Cob(I)alamin adenosyltransferase.''; PubMed Europe PMC Scholia
  83. Andersen CB, Madsen M, Storm T, Moestrup SK, Andersen GR.; ''Structural basis for receptor recognition of vitamin-B(12)-intrinsic factor complexes.''; PubMed Europe PMC Scholia
  84. Zhang YM, Rock CO, Jackowski S.; ''Biochemical properties of human pantothenate kinase 2 isoforms and mutations linked to pantothenate kinase-associated neurodegeneration.''; PubMed Europe PMC Scholia
  85. di Salvo ML, Hunt S, Schirch V.; ''Expression, purification, and kinetic constants for human and Escherichia coli pyridoxal kinases.''; PubMed Europe PMC Scholia
  86. Coelho D, Suormala T, Stucki M, Lerner-Ellis JP, Rosenblatt DS, Newbold RF, Baumgartner MR, Fowler B.; ''Gene identification for the cblD defect of vitamin B12 metabolism.''; PubMed Europe PMC Scholia
  87. Hymes J, Wolf B.; ''Biotinidase and its roles in biotin metabolism.''; PubMed Europe PMC Scholia
  88. Bailey LM, Wallace JC, Polyak SW.; ''Holocarboxylase synthetase: correlation of protein localisation with biological function.''; PubMed Europe PMC Scholia
  89. Srinivasan B, Baratashvili M, van der Zwaag M, Kanon B, Colombelli C, Lambrechts RA, Schaap O, Nollen EA, Podgoršek A, Kosec G, Petković H, Hayflick S, Tiranti V, Reijngoud DJ, Grzeschik NA, Sibon OC.; ''Extracellular 4'-phosphopantetheine is a source for intracellular coenzyme A synthesis.''; PubMed Europe PMC Scholia
  90. Dobson CM, Wai T, Leclerc D, Wilson A, Wu X, Doré C, Hudson T, Rosenblatt DS, Gravel RA.; ''Identification of the gene responsible for the cblA complementation group of vitamin B12-responsive methylmalonic acidemia based on analysis of prokaryotic gene arrangements.''; PubMed Europe PMC Scholia
  91. Kang JH, Hong ML, Kim DW, Park J, Kang TC, Won MH, Baek NI, Moon BJ, Choi SY, Kwon OS.; ''Genomic organization, tissue distribution and deletion mutation of human pyridoxine 5'-phosphate oxidase.''; PubMed Europe PMC Scholia
  92. Tanner SM, Aminoff M, Wright FA, Liyanarachchi S, Kuronen M, Saarinen A, Massika O, Mandel H, Broch H, de la Chapelle A.; ''Amnionless, essential for mouse gastrulation, is mutated in recessive hereditary megaloblastic anemia.''; PubMed Europe PMC Scholia
  93. Rutsch F, Gailus S, Miousse IR, Suormala T, Sagné C, Toliat MR, Nürnberg G, Wittkampf T, Buers I, Sharifi A, Stucki M, Becker C, Baumgartner M, Robenek H, Marquardt T, Höhne W, Gasnier B, Rosenblatt DS, Fowler B, Nürnberg P.; ''Identification of a putative lysosomal cobalamin exporter altered in the cblF defect of vitamin B12 metabolism.''; PubMed Europe PMC Scholia
  94. Subramanian VS, Marchant JS, Said HM.; ''Biotin-responsive basal ganglia disease-linked mutations inhibit thiamine transport via hTHTR2: biotin is not a substrate for hTHTR2.''; PubMed Europe PMC Scholia
  95. Kristiansen M, Aminoff M, Jacobsen C, de La Chapelle A, Krahe R, Verroust PJ, Moestrup SK.; ''Cubilin P1297L mutation associated with hereditary megaloblastic anemia 1 causes impaired recognition of intrinsic factor-vitamin B(12) by cubilin.''; PubMed Europe PMC Scholia
  96. Densupsoontorn N, Sanpakit K, Vijarnsorn C, Pattaragarn A, Kangwanpornsiri C, Jatutipsompol C, Tirapongporn H, Jirapinyo P, Shah NP, Sturm AC, Tanner SM.; ''Imerslund-Gräsbeck syndrome: new mutation in amnionless.''; PubMed Europe PMC Scholia
  97. Manoj N, Strauss E, Begley TP, Ealick SE.; ''Structure of human phosphopantothenoylcysteine synthetase at 2.3 A resolution.''; PubMed Europe PMC Scholia
  98. Daruwala R, Song J, Koh WS, Rumsey SC, Levine M.; ''Cloning and functional characterization of the human sodium-dependent vitamin C transporters hSVCT1 and hSVCT2.''; PubMed Europe PMC Scholia
  99. Borgese N, D'Arrigo A, De Silvestris M, Pietrini G.; ''NADH-cytochrome b5 reductase and cytochrome b5 isoforms as models for the study of post-translational targeting to the endoplasmic reticulum.''; PubMed Europe PMC Scholia
  100. Balamurugan K, Ortiz A, Said HM.; ''Biotin uptake by human intestinal and liver epithelial cells: role of the SMVT system.''; PubMed Europe PMC Scholia
  101. Liang WJ, Johnson D, Jarvis SM.; ''Vitamin C transport systems of mammalian cells.''; PubMed Europe PMC Scholia
  102. Youngdahl-Turner P, Mellman IS, Allen RH, Rosenberg LE.; ''Protein mediated vitamin uptake. Adsorptive endocytosis of the transcobalamin II-cobalamin complex by cultured human fibroblasts.''; PubMed Europe PMC Scholia
  103. Leimkuhler S, Freuer A, Araujo JA, Rajagopalan KV, Mendel RR.; ''Mechanistic studies of human molybdopterin synthase reaction and characterization of mutants identified in group B patients of molybdenum cofactor deficiency.''; PubMed Europe PMC Scholia
  104. Padovani D, Banerjee R.; ''Assembly and protection of the radical enzyme, methylmalonyl-CoA mutase, by its chaperone.''; PubMed Europe PMC Scholia
  105. Abu-Elheiga L, Jayakumar A, Baldini A, Chirala SS, Wakil SJ.; ''Human acetyl-CoA carboxylase: characterization, molecular cloning, and evidence for two isoforms.''; PubMed Europe PMC Scholia
  106. Worgan LC, Niles K, Tirone JC, Hofmann A, Verner A, Sammak A, Kucic T, Lepage P, Rosenblatt DS.; ''Spectrum of mutations in mut methylmalonic acidemia and identification of a common Hispanic mutation and haplotype.''; PubMed Europe PMC Scholia
  107. Lerner-Ellis JP, Dobson CM, Wai T, Watkins D, Tirone JC, Leclerc D, Doré C, Lepage P, Gravel RA, Rosenblatt DS.; ''Mutations in the MMAA gene in patients with the cblA disorder of vitamin B12 metabolism.''; PubMed Europe PMC Scholia
  108. Green P, Wiseman M, Crow YJ, Houlden H, Riphagen S, Lin JP, Raymond FL, Childs AM, Sheridan E, Edwards S, Josifova DJ.; ''Brown-Vialetto-Van Laere syndrome, a ponto-bulbar palsy with deafness, is caused by mutations in c20orf54.''; PubMed Europe PMC Scholia
  109. Schmuck EM, Board PG, Whitbread AK, Tetlow N, Cavanaugh JA, Blackburn AC, Masoumi A.; ''Characterization of the monomethylarsonate reductase and dehydroascorbate reductase activities of Omega class glutathione transferase variants: implications for arsenic metabolism and the age-at-onset of Alzheimer's and Parkinson's diseases.''; PubMed Europe PMC Scholia
  110. Froese DS, Kochan G, Muniz JR, Wu X, Gileadi C, Ugochukwu E, Krysztofinska E, Gravel RA, Oppermann U, Yue WW.; ''Structures of the human GTPase MMAA and vitamin B12-dependent methylmalonyl-CoA mutase and insight into their complex formation.''; PubMed Europe PMC Scholia
  111. Daugherty M, Polanuyer B, Farrell M, Scholle M, Lykidis A, de Crécy-Lagard V, Osterman A.; ''Complete reconstitution of the human coenzyme A biosynthetic pathway via comparative genomics.''; PubMed Europe PMC Scholia
  112. Zhou B, Westaway SK, Levinson B, Johnson MA, Gitschier J, Hayflick SJ.; ''A novel pantothenate kinase gene (PANK2) is defective in Hallervorden-Spatz syndrome.''; PubMed Europe PMC Scholia
  113. Doolin MT, Barbaux S, McDonnell M, Hoess K, Whitehead AS, Mitchell LE.; ''Maternal genetic effects, exerted by genes involved in homocysteine remethylation, influence the risk of spina bifida.''; PubMed Europe PMC Scholia
  114. Yao Y, Yonezawa A, Yoshimatsu H, Masuda S, Katsura T, Inui K.; ''Identification and comparative functional characterization of a new human riboflavin transporter hRFT3 expressed in the brain.''; PubMed Europe PMC Scholia
  115. Bosch AM, Abeling NG, Ijlst L, Knoester H, van der Pol WL, Stroomer AE, Wanders RJ, Visser G, Wijburg FA, Duran M, Waterham HR.; ''Brown-Vialetto-Van Laere and Fazio Londe syndrome is associated with a riboflavin transporter defect mimicking mild MADD: a new inborn error of metabolism with potential treatment.''; PubMed Europe PMC Scholia
  116. Yoshimatsu H, Yonezawa A, Yao Y, Sugano K, Nakagawa S, Omura T, Matsubara K.; ''Functional involvement of RFVT3/SLC52A3 in intestinal riboflavin absorption.''; PubMed Europe PMC Scholia
  117. Plesa M, Kim J, Paquette SG, Gagnon H, Ng-Thow-Hing C, Gibbs BF, Hancock MA, Rosenblatt DS, Coulton JW.; ''Interaction between MMACHC and MMADHC, two human proteins participating in intracellular vitamin B₁₂ metabolism.''; PubMed Europe PMC Scholia
  118. Randaccio L, Geremia S, Demitri N, Wuerges J.; ''Vitamin B12: unique metalorganic compounds and the most complex vitamins.''; PubMed Europe PMC Scholia
  119. Ramaswamy G, Karim MA, Murti KG, Jackowski S.; ''PPARalpha controls the intracellular coenzyme A concentration via regulation of PANK1alpha gene expression.''; PubMed Europe PMC Scholia
  120. Coelho D, Kim JC, Miousse IR, Fung S, du Moulin M, Buers I, Suormala T, Burda P, Frapolli M, Stucki M, Nürnberg P, Thiele H, Robenek H, Höhne W, Longo N, Pasquali M, Mengel E, Watkins D, Shoubridge EA, Majewski J, Rosenblatt DS, Fowler B, Rutsch F, Baumgartner MR.; ''Mutations in ABCD4 cause a new inborn error of vitamin B12 metabolism.''; PubMed Europe PMC Scholia
  121. Johnston J, Bollekens J, Allen RH, Berliner N.; ''Structure of the cDNA encoding transcobalamin I, a neutrophil granule protein.''; PubMed Europe PMC Scholia
  122. Wuerges J, Garau G, Geremia S, Fedosov SN, Petersen TE, Randaccio L.; ''Structural basis for mammalian vitamin B12 transport by transcobalamin.''; PubMed Europe PMC Scholia
  123. Nielsen MJ, Rasmussen MR, Andersen CB, Nexø E, Moestrup SK.; ''Vitamin B12 transport from food to the body's cells--a sophisticated, multistep pathway.''; PubMed Europe PMC Scholia
  124. Zhao R, Gao F, Goldman ID.; ''Molecular cloning of human thiamin pyrophosphokinase.''; PubMed Europe PMC Scholia

History

View all...
CompareRevisionActionTimeUserComment
114645view16:11, 25 January 2021ReactomeTeamReactome version 75
113093view11:15, 2 November 2020ReactomeTeamReactome version 74
112327view15:25, 9 October 2020ReactomeTeamReactome version 73
101226view11:12, 1 November 2018ReactomeTeamreactome version 66
100764view20:38, 31 October 2018ReactomeTeamreactome version 65
100308view19:15, 31 October 2018ReactomeTeamreactome version 64
99854view15:58, 31 October 2018ReactomeTeamreactome version 63
99412view14:35, 31 October 2018ReactomeTeamreactome version 62 (2nd attempt)
99099view12:39, 31 October 2018ReactomeTeamreactome version 62
94004view13:50, 16 August 2017ReactomeTeamreactome version 61
93616view11:28, 9 August 2017ReactomeTeamreactome version 61
86724view09:24, 11 July 2016ReactomeTeamreactome version 56
83083view09:55, 18 November 2015ReactomeTeamVersion54
81407view12:56, 21 August 2015ReactomeTeamVersion53
76875view08:14, 17 July 2014ReactomeTeamFixed remaining interactions
76580view11:56, 16 July 2014ReactomeTeamFixed remaining interactions
75913view09:56, 11 June 2014ReactomeTeamRe-fixing comment source
75613view10:47, 10 June 2014ReactomeTeamReactome 48 Update
74968view13:49, 8 May 2014AnweshaFixing comment source for displaying WikiPathways description
74612view08:39, 30 April 2014ReactomeTeamReactome46
44904view10:24, 6 October 2011MartijnVanIerselOntology Term : 'metabolic pathway of cofactors and vitamins' added !
42173view23:38, 4 March 2011MaintBotModified categories
42075view21:55, 4 March 2011MaintBotAutomatic update
39883view05:54, 21 January 2011MaintBotNew pathway

External references

DataNodes

View all...
NameTypeDatabase referenceComment
(4Fe-4S)(2+) MetaboliteCHEBI:33722 (ChEBI)
2,3-DKGMetaboliteCHEBI:57441 (ChEBI)
2AETMetaboliteCHEBI:17141 (ChEBI)
2xAOX1:cofactorsComplexR-HSA-3204316 (Reactome)
2xENPP1, 2xENPP2, 2xENPP3ComplexR-HSA-8939026 (Reactome)
2xENPP1ComplexR-HSA-196965 (Reactome)
2xMMAA:2xMUT:AdoCblComplexR-HSA-3159272 (Reactome)
2xMMAA:2xMUTComplexR-HSA-3159295 (Reactome)
2xMOCS2-CO-S(1-):2xMOCS2BComplexR-HSA-947582 (Reactome)
2xMOCS2A:2xMOCS2BComplexR-HSA-947569 (Reactome)
2xPDXK:2xZn2+ComplexR-HSA-965005 (Reactome)
2xPNPO:2xFMNComplexR-HSA-964943 (Reactome)
2xPPCSComplexR-HSA-196775 (Reactome)
2xTPK1:Mg2+ComplexR-HSA-196971 (Reactome)
2xTRAPComplexR-HSA-196946 (Reactome)
3xGPHN:3xMg2+ComplexR-HSA-947576 (Reactome)
3xMMABComplexR-HSA-3159285 (Reactome)
3xPPCDC:3xFMNComplexR-HSA-196828 (Reactome)
4x(Btn-PC:Mn2+)ComplexR-HSA-3323188 (Reactome)
4x(PC:Mn2+)ComplexR-HSA-2993798 (Reactome)
5-methyl-THFMetaboliteCHEBI:15641 (ChEBI)
6x(Btn-MCCC1:MCCC2)ComplexR-HSA-3323135 (Reactome)
6x(Btn-PCCA:PCCB)ComplexR-HSA-3323122 (Reactome)
6x(PCCA:PCCB)ComplexR-HSA-2993809 (Reactome)
6xMCCC1:6xMCCC2ComplexR-HSA-3323185 (Reactome)
AASDHPPTProteinQ9NRN7 (Uniprot-TrEMBL)
ABCC1ProteinP33527 (Uniprot-TrEMBL)
ABCD4ProteinO14678 (Uniprot-TrEMBL)
ACACA ProteinQ13085 (Uniprot-TrEMBL)
ACACA:2Mn2+ComplexR-HSA-2993826 (Reactome)
ACACB ProteinO00763 (Uniprot-TrEMBL)
ACACB:2Mn2+ComplexR-HSA-2993859 (Reactome)
ACP5 ProteinP13686 (Uniprot-TrEMBL)
ADPMetaboliteCHEBI:456216 (ChEBI)
AMN ProteinQ9BXJ7 (Uniprot-TrEMBL)
AMPMetaboliteCHEBI:16027 (ChEBI)
AOX1 ProteinQ06278 (Uniprot-TrEMBL)
ATPMetaboliteCHEBI:30616 (ChEBI)
AdoCbl MetaboliteCHEBI:18408 (ChEBI)
AdoCblMetaboliteCHEBI:18408 (ChEBI)
AdoHcyMetaboliteCHEBI:16680 (ChEBI)
AdoMetMetaboliteCHEBI:15414 (ChEBI)
Asc.-MetaboliteCHEBI:59513 (ChEBI)
AscH-MetaboliteCHEBI:38290 (ChEBI)
BCTNMetaboliteCHEBI:27870 (ChEBI)
BTDProteinP43251 (Uniprot-TrEMBL)
Btn-ACACA ProteinQ13085 (Uniprot-TrEMBL)
Btn-ACACA:2Mn2+ComplexR-HSA-2993815 (Reactome)
Btn-ACACB ProteinO00763 (Uniprot-TrEMBL)
Btn-ACACB:2Mn2+ComplexR-HSA-2993829 (Reactome)
Btn-MCCC1 ProteinQ96RQ3 (Uniprot-TrEMBL)
Btn-PC ProteinP11498 (Uniprot-TrEMBL)
Btn-PCCA ProteinP05165 (Uniprot-TrEMBL)
BtnMetaboliteCHEBI:15956 (ChEBI)
CD320 ProteinQ9NPF0 (Uniprot-TrEMBL)
CD320ProteinQ9NPF0 (Uniprot-TrEMBL)
CNCblMetaboliteCHEBI:17439 (ChEBI)
CO2MetaboliteCHEBI:16526 (ChEBI)
COASYProteinQ13057 (Uniprot-TrEMBL)
CTRB1(167-263) ProteinP17538 (Uniprot-TrEMBL)
CTRB1(19-31) ProteinP17538 (Uniprot-TrEMBL)
CTRB1(34-164) ProteinP17538 (Uniprot-TrEMBL)
CTRB2(167-263) ProteinQ6GPI1 (Uniprot-TrEMBL)
CTRB2(19-31) ProteinQ6GPI1 (Uniprot-TrEMBL)
CTRB2(34-164) ProteinQ6GPI1 (Uniprot-TrEMBL)
CTRCProteinQ99895 (Uniprot-TrEMBL)
CUBN ProteinO60494 (Uniprot-TrEMBL)
CUBN:AMN:GIF:CblComplexR-HSA-3000141 (Reactome)
CUBN:AMNComplexR-HSA-264830 (Reactome)
CUBN:AMNComplexR-HSA-3000138 (Reactome)
CYB5A ProteinP00167 (Uniprot-TrEMBL)
CYB5A:ferrihemeComplexR-HSA-198772 (Reactome)
CYB5A:hemeComplexR-HSA-198808 (Reactome)
CYB5R3:FADComplexR-HSA-198850 (Reactome)
Cbl MetaboliteCHEBI:28911 (ChEBI)
CblMetaboliteCHEBI:28911 (ChEBI)
CoA-SHMetaboliteCHEBI:15346 (ChEBI)
CysS452-MOCS3 ProteinO95396 (Uniprot-TrEMBL)
DP-CoAMetaboliteCHEBI:15468 (ChEBI)
DeHAMetaboliteCHEBI:58539 (ChEBI)
ENPP1 ProteinP22413 (Uniprot-TrEMBL)
ENPP2 ProteinQ13822 (Uniprot-TrEMBL)
ENPP3 ProteinO14638 (Uniprot-TrEMBL)
ERUMetaboliteCHEBI:27913 (ChEBI)
FAD MetaboliteCHEBI:16238 (ChEBI)
FADMetaboliteCHEBI:16238 (ChEBI)
FASNProteinP49327 (Uniprot-TrEMBL)
FLAD1ProteinQ8NFF5 (Uniprot-TrEMBL)
FMN MetaboliteCHEBI:17621 (ChEBI)
FMNMetaboliteCHEBI:17621 (ChEBI)
FeHM MetaboliteCHEBI:36144 (ChEBI)
Food proteins R-ALL-3132772 (Reactome)
Food proteins:CblComplexR-ALL-3132775 (Reactome)
Food proteinsR-ALL-3132772 (Reactome)
GIF ProteinP27352 (Uniprot-TrEMBL)
GIF:CblComplexR-HSA-3000147 (Reactome)
GIF:CblComplexR-HSA-3000280 (Reactome)
GIF:CblComplexR-HSA-3000295 (Reactome)
GIFProteinP27352 (Uniprot-TrEMBL)
GPHN ProteinQ9NQX3 (Uniprot-TrEMBL)
GSHMetaboliteCHEBI:16856 (ChEBI)
GSSGMetaboliteCHEBI:17858 (ChEBI)
GSTO dimersComplexR-HSA-198809 (Reactome)
GSTO1 ProteinP78417 (Uniprot-TrEMBL)
GSTO2 ProteinQ9H4Y5 (Uniprot-TrEMBL)
GTPMetaboliteCHEBI:15996 (ChEBI)
H+MetaboliteCHEBI:15378 (ChEBI)
H2O2MetaboliteCHEBI:16240 (ChEBI)
H2OMetaboliteCHEBI:15377 (ChEBI)
HCNMetaboliteCHEBI:18407 (ChEBI)
HCYSMetaboliteCHEBI:17230 (ChEBI)
HLCSProteinP50747 (Uniprot-TrEMBL)
L-AlaMetaboliteCHEBI:57972 (ChEBI)
L-CysMetaboliteCHEBI:35235 (ChEBI)
L-LysMetaboliteCHEBI:32551 (ChEBI)
L-MM-CoAMetaboliteCHEBI:15465 (ChEBI)
L-MetMetaboliteCHEBI:57844 (ChEBI)
LMBRD1ProteinQ9NUN5 (Uniprot-TrEMBL)
MCCC1 ProteinQ96RQ3 (Uniprot-TrEMBL)
MCCC2 ProteinQ9HCC0 (Uniprot-TrEMBL)
MMAA ProteinQ8IVH4 (Uniprot-TrEMBL)
MMAB ProteinQ96EY8 (Uniprot-TrEMBL)
MMACHC ProteinQ9Y4U1 (Uniprot-TrEMBL)
MMACHC:MMADHC:cob(II)alaminComplexR-HSA-3149533 (Reactome)
MMACHC:MMADHCComplexR-HSA-3149532 (Reactome)
MMACHC:cob(II)alaminComplexR-HSA-3095903 (Reactome)
MMACHCProteinQ9Y4U1 (Uniprot-TrEMBL)
MMADHC ProteinQ9H3L0 (Uniprot-TrEMBL)
MMADHCProteinQ9H3L0 (Uniprot-TrEMBL)
MOCS1-1 ProteinQ9NZB8-1 (Uniprot-TrEMBL)
MOCS1A ProteinQ9NZB8-5 (Uniprot-TrEMBL)
MOCS2 ProteinO96007 (Uniprot-TrEMBL)
MOCS2 ProteinO96033 (Uniprot-TrEMBL)
MOCS2ProteinO96033 (Uniprot-TrEMBL)
MOCS3 ProteinO95396 (Uniprot-TrEMBL)
MOCS3-S-S(1-):Zn2+ComplexR-HSA-947584 (Reactome)
MOCS3:Zn2+ (ox.)ComplexR-HSA-947568 (Reactome)
MOCS3:Zn2+ (red.)ComplexR-HSA-947543 (Reactome)
MPT MetaboliteCHEBI:44074 (ChEBI)
MPTMetaboliteCHEBI:58698 (ChEBI)
MTR ProteinQ99707 (Uniprot-TrEMBL)
MTRR ProteinQ9UBK8 (Uniprot-TrEMBL)
MTRR:MTR(MeCbl)ComplexR-HSA-3149551 (Reactome)
MTRR:MTR(cob(I)alamin)ComplexR-HSA-3149516 (Reactome)
MTRR:MTR(cob(II)alamin)ComplexR-HSA-3149544 (Reactome)
MTRR:MTRComplexR-HSA-3204322 (Reactome)
MUT ProteinP22033 (Uniprot-TrEMBL)
MeCbl MetaboliteCHEBI:28115 (ChEBI)
Metabolism of folate and pterinesPathwayR-HSA-196757 (Reactome) Folates are essential cofactors that provide one-carbon moieties in various states of reduction for biosynthetic reactions. Processes annotated here include transport reactions by which folates are taken up by cells and moved intracellularly, folate conjugation with glutamate (required for folate retention within a cell), and some of the key reactions in the generation of reduced folates and one-carbon derivatives of folate.
Mg2+ MetaboliteCHEBI:18420 (ChEBI)
Mn2+ MetaboliteCHEBI:29035 (ChEBI)
MoCoMetaboliteCHEBI:25372 (ChEBI)
MoO4(2-)MetaboliteCHEBI:36264 (ChEBI)
MyrG-CYB5R3(2-301) ProteinP00387 (Uniprot-TrEMBL)
NAD+MetaboliteCHEBI:57540 (ChEBI)
NADHMetaboliteCHEBI:57945 (ChEBI)
NADP+MetaboliteCHEBI:18009 (ChEBI)
NADPHMetaboliteCHEBI:16474 (ChEBI)
NH4+MetaboliteCHEBI:28938 (ChEBI)
Na+MetaboliteCHEBI:29101 (ChEBI)
Nicotinate metabolismPathwayR-HSA-196807 (Reactome) Nicotinate (niacin) and nicotinamide are precursors of the coenzymes nicotinamide-adenine dinucleotide (NAD+) and nicotinamide-adenine dinucleotide phosphate (NADP+). When NAD+ and NADP+ are interchanged in a reaction with their reduced forms, NADH and NADPH respectively, they are important cofactors in several hundred redox reactions. Nicotinate is synthesized from 2-amino-3-carboxymuconate semialdehyde, an intermediate in the catabolism of the essential amino acid tryptophan (Magni et al. 2004).
O2MetaboliteCHEBI:15379 (ChEBI)
PANK1 ProteinQ8TE04 (Uniprot-TrEMBL)
PANK1/3/4ComplexR-HSA-199195 (Reactome)
PANK2(111-570)ProteinQ9BZ23 (Uniprot-TrEMBL)
PANK3 ProteinQ9H999 (Uniprot-TrEMBL)
PANK4 ProteinQ9NVE7 (Uniprot-TrEMBL)
PAPMetaboliteCHEBI:17985 (ChEBI)
PC ProteinP11498 (Uniprot-TrEMBL)
PCCA ProteinP05165 (Uniprot-TrEMBL)
PCCB ProteinP05166 (Uniprot-TrEMBL)
PDXMetaboliteCHEBI:16709 (ChEBI)
PDXK ProteinO00764 (Uniprot-TrEMBL)
PDXPMetaboliteCHEBI:28803 (ChEBI)
PDXateMetaboliteCHEBI:17405 (ChEBI)
PDZD11 ProteinQ5EBL8 (Uniprot-TrEMBL)
PNPO ProteinQ9NVS9 (Uniprot-TrEMBL)
PPANTMetaboliteCHEBI:16858 (ChEBI)
PPCMetaboliteCHEBI:15769 (ChEBI)
PPCDC ProteinQ96CD2 (Uniprot-TrEMBL)
PPCS ProteinQ9HAB8 (Uniprot-TrEMBL)
PPPMetaboliteCHEBI:15266 (ChEBI)
PPanKMetaboliteCHEBI:15905 (ChEBI)
PPiMetaboliteCHEBI:29888 (ChEBI)
PRSS1(16-18)ProteinP07477 (Uniprot-TrEMBL)
PRSS1(16-247)ProteinP07477 (Uniprot-TrEMBL)
PRSS1(19-247)ProteinP07477 (Uniprot-TrEMBL)
PRSS1(24-247) ProteinP07477 (Uniprot-TrEMBL)
PRSS1,3,CTRB1,2ComplexR-HSA-3132763 (Reactome)
PRSS3 ProteinP35030 (Uniprot-TrEMBL)
PXAMetaboliteCHEBI:16410 (ChEBI)
PXAPMetaboliteCHEBI:18335 (ChEBI)
PXLMetaboliteCHEBI:17310 (ChEBI)
PXLP-K258-NFS1-2 dimerComplexR-HSA-947509 (Reactome)
PXLP-K258-NFS1-2 ProteinQ9Y697-2 (Uniprot-TrEMBL)
PXLP-K264-MOCOSProteinQ96EN8 (Uniprot-TrEMBL)
PXLPMetaboliteCHEBI:18405 (ChEBI)
PanKMetaboliteCHEBI:7916 (ChEBI)
PantetheineMetaboliteCHEBI:16753 (ChEBI)
PiMetaboliteCHEBI:43474 (ChEBI)
Precursor ZMetaboliteCHEBI:59648 (ChEBI)
RFK ProteinQ969G6 (Uniprot-TrEMBL)
RFK:Mg2+ComplexR-HSA-196954 (Reactome)
RIBMetaboliteCHEBI:17015 (ChEBI)
SLC19A2 ProteinO60779 (Uniprot-TrEMBL)
SLC19A2/3ComplexR-HSA-199656 (Reactome)
SLC19A3 ProteinQ9BZV2 (Uniprot-TrEMBL)
SLC23A1 ProteinQ9UHI7 (Uniprot-TrEMBL)
SLC23A1,2ComplexR-HSA-198780 (Reactome)
SLC23A2 ProteinQ9UGH3 (Uniprot-TrEMBL)
SLC25A16ProteinP16260 (Uniprot-TrEMBL)
SLC25A19ProteinQ9HC21 (Uniprot-TrEMBL)
SLC2A1 ProteinP11166 (Uniprot-TrEMBL)
SLC2A1,3ComplexR-HSA-198841 (Reactome)
SLC2A3 ProteinP11169 (Uniprot-TrEMBL)
SLC52A1 ProteinQ9NWF4 (Uniprot-TrEMBL)
SLC52A1,2,3ComplexR-HSA-8876278 (Reactome)
SLC52A2 ProteinQ9HAB3 (Uniprot-TrEMBL)
SLC52A3 ProteinQ9NQ40 (Uniprot-TrEMBL)
SLC5A6 ProteinQ9Y289 (Uniprot-TrEMBL)
SLC5A6:PDZD11ComplexR-HSA-5359005 (Reactome)
SOG-MOCS2 ProteinO96033 (Uniprot-TrEMBL)
SOG-MOCS2ProteinO96033 (Uniprot-TrEMBL)
SUCC-CoAMetaboliteCHEBI:57292 (ChEBI)
TCII ProteinP20062 (Uniprot-TrEMBL)
TCII:Cbl:CD320ComplexR-HSA-3000089 (Reactome)
TCII:CblComplexR-HSA-3000111 (Reactome)
TCII:CblComplexR-HSA-3000123 (Reactome)
TCII:CblComplexR-HSA-3000242 (Reactome)
TCIIProteinP20062 (Uniprot-TrEMBL)
TCN1 ProteinP20061 (Uniprot-TrEMBL)
TCN1:CblComplexR-HSA-3132765 (Reactome)
TCN1ProteinP20061 (Uniprot-TrEMBL)
TCN2 ProteinP20062 (Uniprot-TrEMBL)
TDPKR-HSA-997387 (Reactome)
THFMetaboliteCHEBI:15635 (ChEBI)
THMNMetaboliteCHEBI:18385 (ChEBI)
THTPA ProteinQ9BU02 (Uniprot-TrEMBL)
THTPA:Mg2+ComplexR-HSA-964948 (Reactome)
TPK1 ProteinQ9H3S4 (Uniprot-TrEMBL)
ThDPMetaboliteCHEBI:58937 (ChEBI)
ThTPMetaboliteCHEBI:9534 (ChEBI)
VNN1 ProteinO95497 (Uniprot-TrEMBL)
VNN1,VNN2ComplexR-HSA-8939016 (Reactome)
VNN2 ProteinO95498 (Uniprot-TrEMBL)
Zn2+ MetaboliteCHEBI:29105 (ChEBI)
cob(I)alamin MetaboliteCHEBI:15982 (ChEBI)
cob(I)alaminMetaboliteCHEBI:15982 (ChEBI)
cob(II)alamin MetaboliteCHEBI:16304 (ChEBI)
cob(II)alaminMetaboliteCHEBI:16304 (ChEBI)
dADEMetaboliteCHEBI:17319 (ChEBI)
hCBXsComplexR-HSA-3065950 (Reactome)
hCBXsComplexR-HSA-3323101 (Reactome)
heme MetaboliteCHEBI:17627 (ChEBI)
holo-MOCS1ComplexR-HSA-947498 (Reactome)
oxalateMetaboliteCHEBI:30623 (ChEBI)
sulfurated MoCoMetaboliteCHEBI:60102 (ChEBI)
threonateMetaboliteCHEBI:57561 (ChEBI)
unknown

cob(II)alamin

reductase
R-HSA-3968437 (Reactome)
unknown peptidaseR-HSA-3076890 (Reactome)
unknown peptidaseR-HSA-3076903 (Reactome)
unknown proteaseR-HSA-8960083 (Reactome)

Annotated Interactions

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SourceTargetTypeDatabase referenceComment
2,3-DKGArrowR-HSA-9640307 (Reactome)
2,3-DKGR-HSA-9640321 (Reactome)
2AETArrowR-HSA-8938300 (Reactome)
2xAOX1:cofactorsmim-catalysisR-HSA-3204311 (Reactome)
2xENPP1, 2xENPP2, 2xENPP3mim-catalysisR-HSA-8938314 (Reactome)
2xENPP1mim-catalysisR-HSA-196955 (Reactome)
2xMMAA:2xMUT:AdoCblArrowR-HSA-3159259 (Reactome)
2xMMAA:2xMUT:AdoCblmim-catalysisR-HSA-71010 (Reactome)
2xMMAA:2xMUTR-HSA-3159259 (Reactome)
2xMOCS2-CO-S(1-):2xMOCS2BR-HSA-947541 (Reactome)
2xMOCS2-CO-S(1-):2xMOCS2Bmim-catalysisR-HSA-947541 (Reactome)
2xMOCS2A:2xMOCS2BArrowR-HSA-947541 (Reactome)
2xPDXK:2xZn2+mim-catalysisR-HSA-964958 (Reactome)
2xPDXK:2xZn2+mim-catalysisR-HSA-964962 (Reactome)
2xPDXK:2xZn2+mim-catalysisR-HSA-964970 (Reactome)
2xPNPO:2xFMNmim-catalysisR-HSA-965019 (Reactome)
2xPNPO:2xFMNmim-catalysisR-HSA-965079 (Reactome)
2xPPCSmim-catalysisR-HSA-196753 (Reactome)
2xTPK1:Mg2+mim-catalysisR-HSA-196761 (Reactome)
2xTRAPmim-catalysisR-HSA-196950 (Reactome)
3xGPHN:3xMg2+mim-catalysisR-HSA-947531 (Reactome)
3xMMABmim-catalysisR-HSA-3159253 (Reactome)
3xPPCDC:3xFMNmim-catalysisR-HSA-196840 (Reactome)
4x(Btn-PC:Mn2+)ArrowR-HSA-2993802 (Reactome)
4x(PC:Mn2+)R-HSA-2993802 (Reactome)
5-methyl-THFR-HSA-3149539 (Reactome)
6x(Btn-MCCC1:MCCC2)ArrowR-HSA-2993799 (Reactome)
6x(Btn-PCCA:PCCB)ArrowR-HSA-2993447 (Reactome)
6x(PCCA:PCCB)R-HSA-2993447 (Reactome)
6xMCCC1:6xMCCC2R-HSA-2993799 (Reactome)
AASDHPPTmim-catalysisR-HSA-199202 (Reactome)
ABCC1mim-catalysisR-HSA-3095901 (Reactome)
ABCD4mim-catalysisR-HSA-5223313 (Reactome)
ACACA:2Mn2+R-HSA-2993814 (Reactome)
ACACB:2Mn2+R-HSA-4167511 (Reactome)
ADPArrowR-HSA-196773 (Reactome)
ADPArrowR-HSA-196857 (Reactome)
ADPArrowR-HSA-196964 (Reactome)
ADPArrowR-HSA-199203 (Reactome)
ADPArrowR-HSA-3095901 (Reactome)
ADPArrowR-HSA-5223313 (Reactome)
ADPArrowR-HSA-964958 (Reactome)
ADPArrowR-HSA-964962 (Reactome)
ADPArrowR-HSA-964970 (Reactome)
ADPArrowR-HSA-997381 (Reactome)
AMPArrowR-HSA-196753 (Reactome)
AMPArrowR-HSA-196761 (Reactome)
AMPArrowR-HSA-196955 (Reactome)
AMPArrowR-HSA-2993447 (Reactome)
AMPArrowR-HSA-2993799 (Reactome)
AMPArrowR-HSA-2993802 (Reactome)
AMPArrowR-HSA-2993814 (Reactome)
AMPArrowR-HSA-4167511 (Reactome)
AMPArrowR-HSA-947531 (Reactome)
AMPArrowR-HSA-947538 (Reactome)
ATPR-HSA-196753 (Reactome)
ATPR-HSA-196754 (Reactome)
ATPR-HSA-196761 (Reactome)
ATPR-HSA-196773 (Reactome)
ATPR-HSA-196857 (Reactome)
ATPR-HSA-196929 (Reactome)
ATPR-HSA-196964 (Reactome)
ATPR-HSA-199203 (Reactome)
ATPR-HSA-2993447 (Reactome)
ATPR-HSA-2993799 (Reactome)
ATPR-HSA-2993802 (Reactome)
ATPR-HSA-2993814 (Reactome)
ATPR-HSA-3095901 (Reactome)
ATPR-HSA-3159253 (Reactome)
ATPR-HSA-4167511 (Reactome)
ATPR-HSA-5223313 (Reactome)
ATPR-HSA-947531 (Reactome)
ATPR-HSA-947538 (Reactome)
ATPR-HSA-964958 (Reactome)
ATPR-HSA-964962 (Reactome)
ATPR-HSA-964970 (Reactome)
ATPR-HSA-997381 (Reactome)
AdoCblArrowR-HSA-3159253 (Reactome)
AdoCblR-HSA-3159259 (Reactome)
AdoHcyArrowR-HSA-3149518 (Reactome)
AdoMetR-HSA-3149518 (Reactome)
AdoMetR-HSA-947535 (Reactome)
Asc.-R-HSA-198845 (Reactome)
Asc.-R-HSA-9640302 (Reactome)
AscH-ArrowR-HSA-198813 (Reactome)
AscH-ArrowR-HSA-198845 (Reactome)
AscH-ArrowR-HSA-198870 (Reactome)
AscH-ArrowR-HSA-9640302 (Reactome)
AscH-R-HSA-198870 (Reactome)
BCTNArrowR-HSA-3065958 (Reactome)
BCTNArrowR-HSA-3065959 (Reactome)
BCTNArrowR-HSA-3076881 (Reactome)
BCTNArrowR-HSA-4167501 (Reactome)
BCTNR-HSA-3076881 (Reactome)
BCTNR-HSA-3076905 (Reactome)
BCTNR-HSA-4167509 (Reactome)
BTDmim-catalysisR-HSA-3076905 (Reactome)
BTDmim-catalysisR-HSA-4167509 (Reactome)
Btn-ACACA:2Mn2+ArrowR-HSA-2993814 (Reactome)
Btn-ACACA:2Mn2+R-HSA-3065958 (Reactome)
Btn-ACACB:2Mn2+ArrowR-HSA-4167511 (Reactome)
Btn-ACACB:2Mn2+R-HSA-4167501 (Reactome)
BtnArrowR-HSA-199219 (Reactome)
BtnArrowR-HSA-3076905 (Reactome)
BtnArrowR-HSA-4167509 (Reactome)
BtnR-HSA-199219 (Reactome)
BtnR-HSA-2993447 (Reactome)
BtnR-HSA-2993799 (Reactome)
BtnR-HSA-2993802 (Reactome)
BtnR-HSA-2993814 (Reactome)
BtnR-HSA-4167511 (Reactome)
CD320ArrowR-HSA-3000109 (Reactome)
CD320R-HSA-3000122 (Reactome)
CD320mim-catalysisR-HSA-3000122 (Reactome)
CNCblR-HSA-3149519 (Reactome)
CO2ArrowR-HSA-196840 (Reactome)
COASYmim-catalysisR-HSA-196754 (Reactome)
COASYmim-catalysisR-HSA-196773 (Reactome)
CTRCmim-catalysisR-HSA-5693319 (Reactome)
CUBN:AMN:GIF:CblArrowR-HSA-3000103 (Reactome)
CUBN:AMN:GIF:CblR-HSA-3000137 (Reactome)
CUBN:AMNArrowR-HSA-3000137 (Reactome)
CUBN:AMNR-HSA-3000103 (Reactome)
CYB5A:ferrihemeArrowR-HSA-198845 (Reactome)
CYB5A:ferrihemeR-HSA-198824 (Reactome)
CYB5A:hemeArrowR-HSA-198824 (Reactome)
CYB5A:hemeR-HSA-198845 (Reactome)
CYB5A:hememim-catalysisR-HSA-198845 (Reactome)
CYB5R3:FADmim-catalysisR-HSA-198824 (Reactome)
CblArrowR-HSA-3000238 (Reactome)
CblArrowR-HSA-3000243 (Reactome)
CblArrowR-HSA-3000263 (Reactome)
CblArrowR-HSA-3095901 (Reactome)
CblArrowR-HSA-3132753 (Reactome)
CblArrowR-HSA-5223313 (Reactome)
CblR-HSA-3000074 (Reactome)
CblR-HSA-3000120 (Reactome)
CblR-HSA-3000238 (Reactome)
CblR-HSA-3095889 (Reactome)
CblR-HSA-3095901 (Reactome)
CblR-HSA-3245898 (Reactome)
CblR-HSA-5223313 (Reactome)
CoA-SHArrowR-HSA-196773 (Reactome)
CoA-SHArrowR-HSA-199216 (Reactome)
CoA-SHR-HSA-199202 (Reactome)
CoA-SHR-HSA-199216 (Reactome)
CoA-SHR-HSA-8938314 (Reactome)
DP-CoAArrowR-HSA-196754 (Reactome)
DP-CoAR-HSA-196773 (Reactome)
DeHAArrowR-HSA-198818 (Reactome)
DeHAArrowR-HSA-9640302 (Reactome)
DeHAR-HSA-198813 (Reactome)
DeHAR-HSA-198818 (Reactome)
DeHAR-HSA-9640307 (Reactome)
DeHAR-HSA-9640316 (Reactome)
ERUArrowR-HSA-9640321 (Reactome)
FADArrowR-HSA-196929 (Reactome)
FADR-HSA-196955 (Reactome)
FADTBarR-HSA-3165230 (Reactome)
FASNArrowR-HSA-199202 (Reactome)
FASNR-HSA-199202 (Reactome)
FLAD1mim-catalysisR-HSA-196929 (Reactome)
FMNArrowR-HSA-196955 (Reactome)
FMNArrowR-HSA-196964 (Reactome)
FMNR-HSA-196929 (Reactome)
FMNR-HSA-196950 (Reactome)
FMNTBarR-HSA-3165230 (Reactome)
Food proteins:CblR-HSA-3132759 (Reactome)
Food proteinsArrowR-HSA-3132759 (Reactome)
GIF:CblArrowR-HSA-3000120 (Reactome)
GIF:CblArrowR-HSA-3000137 (Reactome)
GIF:CblArrowR-HSA-3000247 (Reactome)
GIF:CblR-HSA-3000103 (Reactome)
GIF:CblR-HSA-3000243 (Reactome)
GIF:CblR-HSA-3000247 (Reactome)
GIFR-HSA-3000120 (Reactome)
GSHR-HSA-198813 (Reactome)
GSSGArrowR-HSA-198813 (Reactome)
GSTO dimersmim-catalysisR-HSA-198813 (Reactome)
GTPR-HSA-947535 (Reactome)
H+ArrowR-HSA-3149560 (Reactome)
H+ArrowR-HSA-947541 (Reactome)
H+ArrowR-HSA-9640321 (Reactome)
H+R-HSA-198824 (Reactome)
H+R-HSA-3095889 (Reactome)
H+R-HSA-3149518 (Reactome)
H+R-HSA-3149519 (Reactome)
H+R-HSA-9640302 (Reactome)
H2O2ArrowR-HSA-3204311 (Reactome)
H2O2ArrowR-HSA-965019 (Reactome)
H2O2ArrowR-HSA-965079 (Reactome)
H2O2R-HSA-9640316 (Reactome)
H2OR-HSA-196950 (Reactome)
H2OR-HSA-196955 (Reactome)
H2OR-HSA-3095901 (Reactome)
H2OR-HSA-3204311 (Reactome)
H2OR-HSA-5223313 (Reactome)
H2OR-HSA-5693319 (Reactome)
H2OR-HSA-8938314 (Reactome)
H2OR-HSA-947531 (Reactome)
H2OR-HSA-947535 (Reactome)
H2OR-HSA-947541 (Reactome)
H2OR-HSA-9640307 (Reactome)
H2OR-HSA-9640316 (Reactome)
H2OR-HSA-9640321 (Reactome)
H2OR-HSA-965067 (Reactome)
H2OR-HSA-965079 (Reactome)
HCNArrowR-HSA-3149519 (Reactome)
HCYSR-HSA-174374 (Reactome)
HLCSmim-catalysisR-HSA-2993447 (Reactome)
HLCSmim-catalysisR-HSA-2993799 (Reactome)
HLCSmim-catalysisR-HSA-2993802 (Reactome)
HLCSmim-catalysisR-HSA-2993814 (Reactome)
HLCSmim-catalysisR-HSA-4167511 (Reactome)
L-AlaArrowR-HSA-947499 (Reactome)
L-AlaArrowR-HSA-947514 (Reactome)
L-CysR-HSA-196753 (Reactome)
L-CysR-HSA-947499 (Reactome)
L-CysR-HSA-947514 (Reactome)
L-LysArrowR-HSA-3076905 (Reactome)
L-LysArrowR-HSA-4167509 (Reactome)
L-MM-CoAR-HSA-71010 (Reactome)
L-MetArrowR-HSA-174374 (Reactome)
L-MetArrowR-HSA-947535 (Reactome)
LMBRD1mim-catalysisR-HSA-3000238 (Reactome)
MMACHC:MMADHC:cob(II)alaminArrowR-HSA-3149494 (Reactome)
MMACHC:MMADHC:cob(II)alaminR-HSA-3149492 (Reactome)
MMACHC:MMADHC:cob(II)alaminR-HSA-3149563 (Reactome)
MMACHC:MMADHCArrowR-HSA-3149492 (Reactome)
MMACHC:MMADHCArrowR-HSA-3149563 (Reactome)
MMACHC:cob(II)alaminArrowR-HSA-3095889 (Reactome)
MMACHC:cob(II)alaminArrowR-HSA-3149519 (Reactome)
MMACHC:cob(II)alaminR-HSA-3149494 (Reactome)
MMACHCR-HSA-3095889 (Reactome)
MMACHCR-HSA-3149519 (Reactome)
MMACHCmim-catalysisR-HSA-3095889 (Reactome)
MMACHCmim-catalysisR-HSA-3149519 (Reactome)
MMADHCR-HSA-3149494 (Reactome)
MOCS2R-HSA-947538 (Reactome)
MOCS3-S-S(1-):Zn2+ArrowR-HSA-947514 (Reactome)
MOCS3-S-S(1-):Zn2+R-HSA-947538 (Reactome)
MOCS3-S-S(1-):Zn2+mim-catalysisR-HSA-947538 (Reactome)
MOCS3:Zn2+ (ox.)ArrowR-HSA-947538 (Reactome)
MOCS3:Zn2+ (red.)R-HSA-947514 (Reactome)
MPTArrowR-HSA-947541 (Reactome)
MPTR-HSA-947531 (Reactome)
MTRR:MTR(MeCbl)ArrowR-HSA-3149518 (Reactome)
MTRR:MTR(MeCbl)ArrowR-HSA-3149539 (Reactome)
MTRR:MTR(MeCbl)R-HSA-174374 (Reactome)
MTRR:MTR(MeCbl)mim-catalysisR-HSA-174374 (Reactome)
MTRR:MTR(cob(I)alamin)ArrowR-HSA-174374 (Reactome)
MTRR:MTR(cob(I)alamin)R-HSA-3149539 (Reactome)
MTRR:MTR(cob(I)alamin)mim-catalysisR-HSA-3149539 (Reactome)
MTRR:MTR(cob(II)alamin)ArrowR-HSA-3204318 (Reactome)
MTRR:MTR(cob(II)alamin)R-HSA-3149518 (Reactome)
MTRR:MTR(cob(II)alamin)mim-catalysisR-HSA-3149518 (Reactome)
MTRR:MTRR-HSA-3204318 (Reactome)
MoCoArrowR-HSA-947531 (Reactome)
MoCoR-HSA-947499 (Reactome)
MoO4(2-)R-HSA-947531 (Reactome)
NAD+ArrowR-HSA-198824 (Reactome)
NAD+ArrowR-HSA-3149560 (Reactome)
NADHR-HSA-198824 (Reactome)
NADHR-HSA-3149560 (Reactome)
NADP+ArrowR-HSA-3095889 (Reactome)
NADP+ArrowR-HSA-3149518 (Reactome)
NADP+ArrowR-HSA-3149519 (Reactome)
NADPHR-HSA-3095889 (Reactome)
NADPHR-HSA-3149518 (Reactome)
NADPHR-HSA-3149519 (Reactome)
NH4+ArrowR-HSA-965079 (Reactome)
Na+ArrowR-HSA-198870 (Reactome)
Na+ArrowR-HSA-199206 (Reactome)
Na+ArrowR-HSA-199219 (Reactome)
Na+R-HSA-198870 (Reactome)
Na+R-HSA-199206 (Reactome)
Na+R-HSA-199219 (Reactome)
O2R-HSA-3204311 (Reactome)
O2R-HSA-965019 (Reactome)
O2R-HSA-965079 (Reactome)
PANK1/3/4mim-catalysisR-HSA-199203 (Reactome)
PANK2(111-570)mim-catalysisR-HSA-196857 (Reactome)
PAPArrowR-HSA-199202 (Reactome)
PAPArrowR-HSA-8938314 (Reactome)
PDXPArrowR-HSA-964962 (Reactome)
PDXPR-HSA-965019 (Reactome)
PDXR-HSA-964962 (Reactome)
PDXateArrowR-HSA-3204311 (Reactome)
PPANTArrowR-HSA-196840 (Reactome)
PPANTArrowR-HSA-8938314 (Reactome)
PPANTArrowR-HSA-8939039 (Reactome)
PPANTR-HSA-196754 (Reactome)
PPANTR-HSA-8939039 (Reactome)
PPCArrowR-HSA-196753 (Reactome)
PPCR-HSA-196840 (Reactome)
PPPArrowR-HSA-3159253 (Reactome)
PPanKArrowR-HSA-196857 (Reactome)
PPanKArrowR-HSA-199203 (Reactome)
PPanKR-HSA-196753 (Reactome)
PPiArrowR-HSA-196753 (Reactome)
PPiArrowR-HSA-196754 (Reactome)
PPiArrowR-HSA-196929 (Reactome)
PPiArrowR-HSA-2993447 (Reactome)
PPiArrowR-HSA-2993799 (Reactome)
PPiArrowR-HSA-2993802 (Reactome)
PPiArrowR-HSA-2993814 (Reactome)
PPiArrowR-HSA-4167511 (Reactome)
PPiArrowR-HSA-947531 (Reactome)
PPiArrowR-HSA-947535 (Reactome)
PPiArrowR-HSA-947538 (Reactome)
PRSS1(16-18)ArrowR-HSA-5693319 (Reactome)
PRSS1(16-247)R-HSA-5693319 (Reactome)
PRSS1(19-247)ArrowR-HSA-5693319 (Reactome)
PRSS1,3,CTRB1,2mim-catalysisR-HSA-3132753 (Reactome)
PXAPArrowR-HSA-964958 (Reactome)
PXAPR-HSA-965079 (Reactome)
PXAR-HSA-964958 (Reactome)
PXLP-K258-NFS1-2 dimermim-catalysisR-HSA-947514 (Reactome)
PXLP-K264-MOCOSmim-catalysisR-HSA-947499 (Reactome)
PXLPArrowR-HSA-964970 (Reactome)
PXLPArrowR-HSA-965019 (Reactome)
PXLPArrowR-HSA-965079 (Reactome)
PXLR-HSA-3204311 (Reactome)
PXLR-HSA-964970 (Reactome)
PanKArrowR-HSA-199206 (Reactome)
PanKArrowR-HSA-8938300 (Reactome)
PanKR-HSA-196857 (Reactome)
PanKR-HSA-199203 (Reactome)
PanKR-HSA-199206 (Reactome)
PantetheineR-HSA-8938300 (Reactome)
PiArrowR-HSA-196950 (Reactome)
PiArrowR-HSA-3095901 (Reactome)
PiArrowR-HSA-5223313 (Reactome)
PiArrowR-HSA-965067 (Reactome)
Precursor ZArrowR-HSA-947535 (Reactome)
Precursor ZR-HSA-947541 (Reactome)
R-HSA-174374 (Reactome) A methyl group from 5-methyltetrahydrofolate is transferred to homocysteine (HCYS) via a meCbl intermediate, forming methionine (L-Met) (Leclerc et al. 1996).
R-HSA-196753 (Reactome) The conjugation of cysteine (Cys) and 4'- phosphopantothenate (PPanK) to form 4-phosphopantothenoylcysteine (PPC) , coupled to the conversion of ATP to AMP and pyrophosphate, is catalyzed by cytosolic phosphopantothenate-cysteine ligase (PPCS aka Phosphopantothenoylcysteine synthase or PPC synthase). Mammalian PPCS prefers ATP to CTP, unlike the E. coli ortholog (Daughtery et al. 2002; Manoj et al. 2003).
R-HSA-196754 (Reactome) The adenylyl transferase activity of bifunctional coenzyme A synthase (COASY) catalyzes the transfer of an adenylyl group from ATP to pantetheinephosphate (PPANT) to form dephospho-Coenzyme A (DP-CoA) (Daugherty et al. 2002). The enzyme is associated with the mitochondrial outer membrane (Zhyvoloup et al. 2003).
R-HSA-196761 (Reactome) Cytosolic thiamin pyrophosphokinase (TPK1) catalyzes the reaction of thiamin (THMN) and ATP to form thiamin diphosphate (ThDP aka thiamin pyrophosphate) and ADP. ThDP is an active cofactor for transketolase, pyruvate dehydrogenase and alpha-ketoglutarate dehydrogenase, enzymes involved in glycolysis and energy production. The gene encoding the human enzyme has been cloned and its protein product has been shown to have TPK1 activity (Nosaka et al. 2001; Zhao et al. 2001). Its homodomeric structure and association with Mg2+ are inferred from properties of the homologous yeast enzyme (Baker et al. 2001).
R-HSA-196773 (Reactome) The kinase activity of CoA synthase (COASY) catalyzes the phosphorylation of dephospho-CoA to form Coenzyme A (CoA-SH). The enzyme is located in the mitochondrial outer membrane (Daugherty et al. 2002; Zhyvoloup et al. 2003).
R-HSA-196840 (Reactome) The decarboxylation of phosphopantothenoylcysteine (PPC) to 4'-phosphopantetheine (PPANT) is carried out by phosphopantothenoylcysteine decarboxylase (PPCDC). PPCDC is cytosolic and exists as a homotrimer, binding one FMN cofactor per subunit. While a second isoform has been inferred from large-scale sequnceing studies, it lacks the protein's FMN-binding domain and would thus appear to be nonfunctional if it is expressed.
R-HSA-196857 (Reactome) Pantothenate kinase 2 catalyzes the reaction of ATP and pantothenate to form ADP and phosphopantothenate. While pantothenate kinase 2 co-purifies with mitocondria, its precise location within the mitochondrion has not been established (Hortnagel et al. 2003; Johnson et al. 2004). Recent work by Leonardi et al. (2007) supports a model in which the enzyme is located in the intermembrane space, hence freely accessible to small molecules from the cytosol.Pantothenate is phosphorylated by pantothenate kinase (PANK). Deficiencies in PANK2 cause a progressive neurodegenerative disorder associated with iron accumulation in the brain, but the relationship between disease symptoms and pantothenate metabolism remains unclear (Zhou et al. 2001; Zhang et al. 2006).
R-HSA-196929 (Reactome) FMN can be phosphorylated and adenylated to produce the second cofactor from riboflavin origins, flavin adenine dinucleotide (FAD). The enzyme responsible , FMN adenylyltransferase (FLAD1 aka FAD synthase), is cytosolic and transfers a phosphate and an adenyl group from ATP to form FAD.
R-HSA-196950 (Reactome) Cytosolic, homodimeric tartrate-resistant acid phosphatase type 5 (TRAP) catalyzes the hydrolysis of flavin mononucleotide (FMN) to yield riboflavin (RIB) and orthophosphate.
R-HSA-196955 (Reactome) Phosphatase action on flavin adenine dinucleotide (FAD) can reform flavin mononucleotide (FMN). The enzyme performing the reaction is nucleotide pyrophosphatase (ENPP1) and it exists as a homodimer on the plasma membrane.
R-HSA-196964 (Reactome) Phosphorylation of riboflavin (RIB) results in the formation of the first cofactor, flavin mononucleotide (FMN). This reaction is catalyzed by riboflavin kinase (RFK), a cytosolic enzyme existing as a monomer. It utilizes either zinc or magnesium ions in the reaction.
R-HSA-198813 (Reactome) Cytosolic omega class glutathione transferases (GSTO1 and GSTO2) catalyze the reaction of dehydroascorbate (DeHA) and glutathione (GSH) to form ascorbate (AscH-) and oxidized glutathione (GSSG). The GSTO enzymes occur as homodimers (Board et al. 2000), and while both have dehydroascorbate reductase activity in vitro, that of GSTO2 is much greater than that of GSTO1 (Schmuck et al. 2005). Polymorphisms affecting the activities of the two enzymes have been described (Whitbread et al. 2005).
R-HSA-198818 (Reactome) The uptake of extracellular dehydroascorbate (DeHA) into the cytosol is mediated by GLUT1 and GLUT3 (encoded by SLC2A1 and SLCA3 respectively) associated with the plasma membrane (Rumsey et al. 1997, 2000). This process may play a significant role in ascorbate utilization in the central nervous system (Agus et al. 1997). The process is efficiently competitively inhibited by glucose, leading to the suggestion that inhibited dehydroascorbate uptake may contribute to the pathology of diabetes (Liang et al. 2001, Rumsey et al. 2000).
R-HSA-198824 (Reactome) Cytochrome b5 reductase (CYB5R3) catalyzes the reduction of cytosolic ferric CYB5A (CYB5A:ferriheme) to ferrous CYPB5A (CYB5A:heme), coupled to the conversion of NADH to NAD+ (Shirabe et al. 1995). CYB5R3 is associated with the outer mitochondrial membrane via a myristoyl group added post-translationally to glycine residue 2 of the protein (Borgese et al. 1993).
R-HSA-198845 (Reactome) The reduction of cytosolic semidehydroascorbate (SDA) to ascorbate (AscH-) is catalyzed by cytochrome B5 (CYB5A) associated with the mitochondrial outer membrane. In the course of the reaction, the heme iron of the cytochrome is oxidized (Linster & Van Schaftingen 2007, Shirabe et al. 1995).
R-HSA-198870 (Reactome) The plasma membrane-associated transport proteins SVCT1 and SVCT2 (encoded by SLC23A1 and SLC23A2 respectively) are each capable of mediating the uptake of one molecule of ascorbate (AscH-) and two sodium ions from the extracellular space to the cytosol (Daruwala et al. 1999, Rajan et al. 1999, Wang et al. 1999). In the body SVCT2 is expressed in most tissues, while SVCT1 is largely confined to epithelial cells (Liang et al. 2001). SVCT2 may mediate fetal uptake of ascorbate from the maternal circulation (Rajan et al. 1999). The transporters responsible for its uptake from the small intestine and for its release from enterocytes into the circulation have not been identified, although both SVCT1 and 2 are expressed in intestinal cells.
R-HSA-199202 (Reactome) Cytosolic AASDHPPT (alpha-aminoadipic semialdehyde dehydrogenase-phosphopantetheinyl transferase) catalyzes the transfer of a phosphopantetheine moiety from coenzyme A to serine 2156 within the ACP domain of FAS (fatty acyl synthase). Only a single human enzyme with phosphopantetheinyl transferase activity has been identified, and its broad substrate specificity suggests that it may be responsible as well for the postranslational modification of enzymes of lysine catabolism (Joshi et al. 2003; Praphanphoj et al. 2001).
R-HSA-199203 (Reactome) Cytosolic pantothenate kinases catalyze the reaction of ATP and pantothenate to form ADP and phosphopantothenate. This enzymatic activity has been demonstrated in crude cell extracts for two isoforms of mouse pantothenate kinase 1 (Rock et al. 2002) and for their human homologues (Ramaswamy and 2004). Two additional human genes, PANK3 and PANK4, encode closely related proteins but pantothenate kinase activity has not been demonstrated experimentally for them (Leonardi et al. 2005; Zhou et al. 2001).
R-HSA-199206 (Reactome) The plasma membrane-associated transport protein SLC5A6 (SMVT) mediates the uptake of one molecule of pantothenate (PanK) and two sodium ions from the extracellular space to the cytosol. Limited Northern blotting studies suggest that SLC5A6 is widely expressed, and abundant in placenta and small intestine. SLC5A6 may thus play a central role in pantothenate uptake. SLC5A6 also mediates the uptake of biotin and lipoate (Prasad et al. 1999, Wang et al. 1999). PDZ domain-containing protein 11 (PDZD11 aka AIPP1) is a cytosolic protein with a single PDZ domain which can bind to the C-terminal class 1 PDZ binding motif of SLC5A6, resulting in a significant induction of vitamin uptake over that with SLC5A6 alone (Nabokina et al. 2011).
R-HSA-199216 (Reactome) Graves disease carrier protein (SLC25A16), associated with the inner mitochondrial membrane, mediates the transport of cytosolic coenzyme A (CoA-SH) into the mitochondrial matrix. Evidence for this event is indirect. The protein has the sequence motifs expected for a transport protein, and yeast cells deficient in its homologue, Leu5p, fail to accumulate mitochondrial CoA-SH and can be rescued by expression of SLC25A16. At the same time, neither the yeast nor the human protein has been shown directly to function as a transporter (Prohl et al. 2001, Leonardi et al. 2007).
R-HSA-199219 (Reactome) The plasma membrane-associated transport protein SLC5A6 (aka sodium-dependent multivitamin transporter, SMVT) mediates the uptake of one molecule of biotin (Btn) and two sodium ions from the extracellular space to the cytosol. Limited Northern blotting studies suggest that SLC5A6 is widely expressed and abundant in placenta, liver and small intestine. SLC5A6 may thus play a central role in Btn uptake from dietary sources. SLC5A6 also mediates the uptake of pantothenate and lipoate (Prasad et al. 1999, Wang et al. 1999, Balamurugan et al. 2003). PDZ domain-containing protein 11 (PDZD11 aka AIPP1) is a cytosolic protein with a single PDZ domain which can bind to the C-terminal class 1 PDZ binding motif of SLC5A6, resulting in a significant induction of vitamin uptake over that with SLC5A6 alone (Nabokina et al. 2011).
R-HSA-199626 (Reactome) Two transport proteins, SLC19A2 (THTR1) and SLC19A3 (THTR2), associated with the plasma membrane, are each able to mediate the transport of extracellular thiamin into the cytosol. In the body, both transporters are widely distributed, and both are abundant in kidney and intestinal epithelia, consistent with their involvement in thiamin uptake under physiological conditions (Ashokkumar et al. 2006; Said et al. 2004; Subramanian et al. 2006 - J Biol Chem). The observation that mutations in SLC19A2 (THTR1) cause a progressive disorder that can be partially reversed by treatment with high doses of thiamin likewise suggests a role for this protein in thiamin uptake under normal conditions (Diaz et al. 1999; Fleming et al. 1999; Labay et al. 1999).

Two features of this transport process remain incompletely understood, however. First, mutations in SLC19A3 cause a progressive disorder that is responsive to biotin treatment (Zhou et al. 2005), although studies of cultured cells indicate that the protein has no affinity for biotin (Subramanian et al. 2006 - Am J Physiol). Also, studies to date provide little information about the mechanism by which thiamin, once taken up by epithelial cells in the intestine and kidney, is released from these cells into the blood.

R-HSA-2993447 (Reactome) Biotin (Btn) acts as a coenzyme to 4 carboxylases which exist in their inactive apo forms. These apo-carboxylases are biotinylated to their active halo forms by the activity of biotin-protein ligase (HCLS) (Ingaramo & Beckett 2012, Hiratsuka et al. 1998, Bailey et al. 2010). HCLS is localised to the cytosol and mitochondrion so can perform this activity in either of these locations. Defects in HLCS causes holocarboxylase synthetase deficiency (HLCS deficiency aka biotin-responsive multiple carboxylase deficiency; MIM:253270). HLCS deficiency is an autosomal recessive disorder whereby deficient HLCS activity results in reduced activity of multiple carboxylases. Symptoms include metabolic acidosis, organic aciduria, lethargy, hypotonia, convulsions and dermatitis (Suzuki et al. 2005). Propionyl-CoA carboxylase is most likely functional as a dodecamer, composed of six Btn-containing alpha subunits (PCCA) and six beta subunits (PCCB). The exact order in which this complex is constructed is unknown.
R-HSA-2993799 (Reactome) Biotin (Btn) acts as a coenzyme to 4 carboxylases which exist in their inactive apo forms. In the cytosol, these apo carboxylases are biotinylated to their active halo forms by the activity of biotin-protein ligase (HCLS) (Ingaramo & Beckett 2012, Hiratsuka et al. 1998, Bailey et al. 2010). HCLS is localised to the cytosol and mitochondrion so can perform this activity in either of these locations. Defects in HLCS causes holocarboxylase synthetase deficiency (HLCS deficiency aka biotin-responsive multiple carboxylase deficiency; MIM:253270). HLCS deficiency is an autosomal recessive disorder whereby deficient HLCS activity results in reduced activity of multiple carboxylases. Symptoms include metabolic acidosis, organic aciduria, lethargy, hypotonia, convulsions and dermatitis (Suzuki et al. 2005). Methylcrotonoyl-CoA carboxylase is most likely functional as a dodecamer, composed of 6 Btn-containing alpha subunits (MCCC1) and six beta subunits (MCCC2). The exact order in which this complex is constructed is unknown.
R-HSA-2993802 (Reactome) Biotin (Btn) acts as a coenzyme to 4 carboxylases which exist in their inactive apo forms. In the cytosol, these apo-carboxylases are biotinylated to their active halo forms by the activity of biotin-protein ligase (HCLS) (Ingaramo & Beckett 2012, Hiratsuka et al. 1998, Bailey et al. 2010). HCLS is localised to the cytosol and mitochondrion so can perform this activity in either of these locations. Defects in HLCS causes holocarboxylase synthetase deficiency (HLCS deficiency aka biotin-responsive multiple carboxylase deficiency; MIM:253270). HLCS deficiency is an autosomal recessive disorder whereby deficient HLCS activity results in reduced activity of multiple carboxylases. Symptoms include metabolic acidosis, organic aciduria, lethargy, hypotonia, convulsions and dermatitis (Suzuki et al. 2005). Pyruvate carboxylase (PC) is homotetrameric, binds 1 Mn2+ and 1 Btn per PC subunit (Xiang & Tong 2008). The exact order in which this complex is constructed is unknown.
R-HSA-2993814 (Reactome) Biotin (Btn) acts as a coenzyme for 5 carboxylases that exist in their inactive apo forms. In the cytosol and mitochondrion, these apo-carboxylases are biotinylated to their active holo forms by the activity of biotin protein ligase (HCLS) (Ingaramo & Beckett 2012, Bailey et al. 2010, Hiratsuka et al. 1998). Defects in HLCS causes holocarboxylase synthetase deficiency (HLCS deficiency aka early-onset multiple carboxylase deficiency; MIM:253270). HLCS deficiency is an autosomal recessive disorder whereby deficient HLCS activity results in reduced activity of all five carboxylases. Symptoms include metabolic acidosis, organic aciduria, lethargy, hypotonia, convulsions and dermatitis (Suzuki et al. 2005). The first committed step in the synthesis of fatty acids is performed by the biotin-dependent enzyme acetyl CoA carboxylase [EC 6.4.1.2]. Acetyl CoA carboxylases 1 and 2 (ACACA and ACACB) have one Btn moiety covalently attached to each subunit (Abu-Elheiga et al. 1995). Eukaryotic acetyl-CoA carboxylases are heterodimers that can form catalytically active extended oligomers (Weatherly et al. 2004). Unlike the other biotin-dependent carboxylases that reside inside the mitochondrion, ACACA and B are located in the cytosol (shown here) and outer mitochondrial membrane respectively (Abu-Elheiga et al. 2000).
R-HSA-3000074 (Reactome) Transcobalamin (TCN, TC) is a vitamin B12-binding protein secreted by endothelial cells into plasma that facilitates the endocytosis of cobalamin (Cbl, vitamin B12) into hepatocytes or cells requiring Cbl. Two TCN genes, TCN1 (aka haptocorrin) and TCN2, code for functional proteins (TCI and TCII respectively) that can bind Cbl (Johnston et al. 1989, Quadros et al. 1986, Wuerges et al. 2006). TCII can be bound to between 10-30% of the total circulating Cbl, the remaining Cbl bound to TCI and not available for uptake by cells outside of the liver. TCII transports Cbl used by tissues. The role of TCI carrying between 70-90% of the Cbl serum fraction is unknown. Free Cbl can be taken up by passive diffusion but only at concentrations that are never achieved in the body.
R-HSA-3000103 (Reactome) In the mucosal cells of the distal ileum, in preparation for internalisation, the gastric intrinsic factor:cobalamin (GIF:Cbl) complex interacts with cubilin (CUBN). CUBN is a cotransporter facilitating uptake of lipoproteins, vitamins and iron (Matthews et al. 2007). CUBN is in complex with protein amnionless (AMN), a necessary component which directs subcellular localization and endocytosis of GIF:Cbl (Fyfe et al. 2004, Anderson et al. 2010). Defects in CUBN and AMN both cause recessive hereditary megaloblastic anemia 1 (RH-MGA1 aka MGA1 Norwegian type or Imerslund-Grasbeck syndrome, I-GS; MIM:261100). The resultant malabsorption of Cbl (vitamin B12) leads to impaired B12-dependent folate metabolism and ultimately impaired thymine synthesis and DNA replication (Aminoff et al. 1999, Kristiansen et al. 2000, Tanner et al. 2003, Densupsoontorn et al. 2012).
R-HSA-3000109 (Reactome) Once the receptor complex (TCII:Cbl:CD320) is internalised by endocytosis, the receptor (CD320) dissociates to return to the plasma membrane (Youngdahl-Turner et al. 1979).
R-HSA-3000112 (Reactome) Transcobalamin II (TCII, the product of the gene TCN2) degradation is necessary for cobalamin (Cbl) to be released from the complex and made available for binding to Cbl-dependant apoenzymes (Youngdahl-Turner et al. 1979). The TCII:Cbl complex translocates to lysosomes for degradation.
R-HSA-3000120 (Reactome) Gastric parietal cells secrete gastric intrinsic factor (GIF) which binds tightly to free cobalamin (Cbl) released from transcobalamin (TCN1, haptocorrin) in the proximal intestine (Matthews et al. 2007). Cbl must bind to GIF to be absorbed from the small intestine.
R-HSA-3000122 (Reactome) The ubiquitously-expressed CD320 antigen (CD320 aka transcobalamin receptor, TCblR) internalises TCII:Cbl by endocytosis after binding to it (Quadros et al. 2009, Quadros et al. 2005). Defects in CD320 cause methylmalonic aciduria type TCblR (MMATC aka methylmalonic aciduria; MIM:613646) (Quadros et al. 2010). The first patient identified had only methylmalonic aciduria, subsequent patients had both this and homocystinuria. There is so far no confirmed clinical consequence of this disorder; patients have somewhat elevated MMA and homocysteine levels but no consistent additional findings.
R-HSA-3000137 (Reactome) The cubilin:protein amnionless (CUBN:AMN) complex mediates the internalisation and endocytosis of gastric internal factor:cobalamin (GIF:Cbl) into mucosal cells of the distal ileum (Fyfe et al. 2004).
R-HSA-3000238 (Reactome) The probable lysosomal cobalamin transporter (LMBD1) is the most likely candidate to transport cobalamin (Cbl) from inside the lysosome to the cytosol (Rutsch et al. 2009). From here, Cbl can either be used to synthesise the essential cofactors for methionine synthase in the cytosol or methylmalonyl-CoA mutase in the mitochondria or, it can transported out of the cell to tissues that require Cbl. Defects in LMBRD1 (the gene that produces LMBD1) cause methylmalonic aciduria and homocystinuria type cblF (MMAHCF; MIM:277380), characterised biochemically by decreased levels of the coenzymes adenosylcobalamin (AdoCbl) and methylcobalamin (MeCbl) (Rutsch et al. 2009, Gailus et al. 2010).
R-HSA-3000243 (Reactome) In the lysosome, gastric intrinsic factor (GIF) bound to cobalamin (Cbl) is degraded by an unknown protease to release Cbl (Fyfe et al. 2004).
R-HSA-3000247 (Reactome) Gastric intrinsic factor (GIF) bound to cobalamin (Cbl) is targeted to lysosomes for degradation (Fyfe et al. 2004).
R-HSA-3000263 (Reactome) Once in the lysosome, transcobalamin 2:cobalamin (TCII:Cbl) is degraded to release Cbl (Youngdahl-Turner et al. 1979). Cbl is ready to be exported out of the lysosome to the cytosol by the probable lysosomal cobalamin transporter (LMBRD1) (Rutsch et al. 2009). Once in the cytosol, Cbl can be used in the synthesis of the essential cofactors methylcobalamin (MeCbl) and adenosylcobalamin (AdoCbl) as described in the steps above.
R-HSA-3065958 (Reactome) Cytosolic acetyl-CoA carboxylases 1 and 2 (Btn-ACACA/B:2Mn2+) are degraded proteolytically to biocytin (BCTN aka biotinyl-lysine) or small biotinyl peptides (not shown here) by an unknown protease (Chandler & Ballard 1985, Hymes & Wolf 1996, Hymes & Wolf 1999).
R-HSA-3065959 (Reactome) The mitochondrial holocarboxylases (hCBXs) propionyl-CoA carboxylase, methylcrotonoyl-CoA carboxylase and pyruvate carboxylase are degraded proteolytically to biocytin (BCTN aka biotinyl-lysine) or small biotinyl peptides (not shown here) (Chandler & Ballard 1985, Hymes & Wolf 1996, Hymes & Wolf 1999).
R-HSA-3076881 (Reactome) After holocarboxylase degradation, biocytin (BCTN) translocates to the extracellular region by an unknown mechanism (Chandler & Ballard 1985).
R-HSA-3076905 (Reactome) Human biotinidase (BTD, EC 3.5.1.12) (Cole et al. 1994) catalyzes the hydrolysis of biocytin (BCTN, aka biotinyl-lysine), a product of biotin dependent carboxylase degradation, to biotin (Btn) and lysine. As a result, Btn is again available to be used in the biotinylation of apo-carboxylases in the mitochondrion. BTD is both secreted from various cells and localised in the mitochondria (Wolf & Jensen 2005). BTD deficiency, an autosomal recessive disorder, results in a secondary Btn deficiency that leads to juvenile onset multiple carboxylase deficiency (MIM:253260) (Wolf et al. 1983).
R-HSA-3095889 (Reactome) Methylmalonic aciduria and homocystinuria type C protein (MMACHC aka cblC protein) is suggested to be involved in the binding and intracellular transport of cobalamin (Cbl aka vitamin B12). MMACHC can catalyse the removal of the "R" group (formally called the upper axial ligand) from Cbl (eg dealkylation of AdoCbl and MeCbl or decyanation of CNCbl) which can result in the reduction of Cbl (+3 oxidation state) to cob(II)alamin (B12r, vitamin B12r +2 oxidation state) (Hannibal et al. 2009). Cob(II)alamin is escorted by MMACHC to its destination enzyme partners in the mitochondria and cytosol.

Defects in MMACHC cause methylmalonic aciduria and homocystinuria type cblC (MMAHCC; MIM:277400). MMAHCC is the most common disorder of Cbl metabolism and is characterised by decreased levels of the coenzymes adenosylcobalamin (AdoCbl) and methylcobalamin (MetCbl). Affected individuals may have developmental, haematologic, neurologic, metabolic, ophthalmologic, and dermatologic clinical findings (Lerner-Ellis et al. 2006).
R-HSA-3095901 (Reactome) Multidrug resistance-associated protein 1 (ABCC1, MRP1) can specifically mediate the ATP-dependant export of free cobalamin (Cbl aka vitamin B12) from small intestine cells to the portal vein (Shah et al. 2011).
R-HSA-3132753 (Reactome) In the proximal intestine, pancreatic enzymes degrade transcobalamin 1 (TCN1) to release cobalamin (Cbl). The two major pancreatic proteases are trypsins (PRSSs) and chymotrypsins (CTRBs) (Srikumar & Premalatha 2003, Nielsen et al. 2012).
R-HSA-3132759 (Reactome) Transcobalamin 1 (TCN1 aka haptocorrin, HC, TCII) is a glycoprotein produced by salivary glands in response to food ingestion (Johnston et al. 1989). TCN1 binds strongly to cobalamin (Cbl aka vitamin B12) and its essential function is protection of the acid-sensitive Cbl while it moves through the stomach. Once food is in the stomach, pepsin and the acidic pH degrade food proteins. Cbl is in its +3 oxidation state in dietary sources.
R-HSA-3149492 (Reactome) Exact details are unclear but it is assumed once the binding proteins (MMADCHC and MMADHC) deliver cob(II)alamin (B12r) to its cytosolic destination, they dissociate from it (Mah et al. 2013, Plesa et al. 2011, Deme et al. 2012).
R-HSA-3149494 (Reactome) MMACHC:cob(II)alamin (B12r, vitamin B12r) binding to methylmalonic aciduria and homocystinuria type D protein (MMADHC) represents a branch point in the targeted delivery of cob(II)alamin to either cytosolic or mitochondrial enzymes requiring this cofactor (Mah et al. 2013, Plesa et al. 2011, Deme et al. 2012). Both MMACHC and MMADHC are implicated in the intracellular transport of cobalamins but exact details of the mechanisms involved remain unclear.

Defects in MMADHC cause methylmalonic aciduria and homocystinuria type cblD (MMAHCD; MIM:277410), a disorder of Cbl metabolism characterised by decreased levels of the coenzymes adenosylcobalamin (AdoCbl) and methylcobalamin (MeCbl) (Coelho et al. 2008).
R-HSA-3149518 (Reactome) Methionine synthase reductase (MTRR) is involved in reducing cob(II)alamin (B12r) to methylcobalamin (MeCbl), the cofactor form used by methionine synthase (MTR). Regeneration of functional MTR requires reductive methylation via a reaction catalysed by MTRR in which S-adenosylmethionine (AdoMet, SAM) is used as a methyl donor. MTRR requires 1 FMN and 1 FAD per subunit for activity (Wolthers et al. 2007). MTRR exists in a stable complex with MTR, bound through their FMN-binding and C-terminal activation domains respectively (Wolthers & Scrutton 2007, Wolthers & Scrutton 2009).

When methionine synthase (MTR) is functioning properly, cobalamin (Cbl) is continuously shuttled between two forms, cob(I)alamin and MeCbl. There are 2 half reactions: transfer of a methyl group from 5-methyltetrahydrofolate (MTHF) to enzyme-bound cob(I)alamin to form MeCbl; and transfer of the methyl group from MeCbl to homocysteine (HYCS) to form AdoMet, methionine and regenerate cob(I)alamin. From time to time (every few hundred cycles), the enzyme-bound cobalamin is spontaneously oxidized to form cob(II)alamin. When this happens, MTRR in conjunction with MTR catalyzes the reductive methylation of cob(II)alamin to form MeCbl. If MTRR is defective, cob(II)alamin accumulates and methionine synthase is inactivated.

Defects in MTRR cause methylcobalamin deficiency type E (cblE; MIM:236270) (Wilson et al. 1999). Patients with cblE exhibit megaloblastic anemia and hyperhomocysteinemia. AdoMet is used as a methyl donor in many biological reactions and its demethylation produces homocysteine. Remethylation is carried out by MTR in conjunction with MTRR but in cblE patients, MTR-bound cobalamin cannot be reduced by defective MTRR to form a functional enzyme thus homocysteine accumulates. Mutations in MTRR that cause cblE include Leu576del (Leclerc et al. 1998) and S454L (Zavadakova et al. 2005). In terms of frequency, the most common MTRR mutation is a c.903+469C>T mutation which creates a novel splice site deep in an intron and results in inclusion of a 140-bp insertion in MTRR mRNA (Homolova et al. 2010). Wilson et al. showed that a 66A G polymorphism, resulting in an Ile22Met (I22M) substitution, is associated with susceptibility to folate sensitive neural tube defects (FS NTD; MIM:601634) (Wilson et al. 1999b, Doolin et al. 2002). Serum deficiency of vitamin B12 increased the effect.
R-HSA-3149519 (Reactome) A semi-synthetic form of the vitamin, cyanocobalamin (CNCbl, where a cyanide group is in the upper axial position), is produced from bacterial hydroxocobalamin and used in many pharmaceuticals, supplements and as a food additive. It is presumed to take the same route after ingestion as other forms of cobalamin (Cbl) (Randaccio et al. 2010). At this point in the pathway, CNCbl is reductively decyanated by methylmalonic aciduria and homocystinuria type C protein (MMACHC) to produce cob(II)alamin (B12r, vitaman B12r) and hydrogen cyanide (HCN) (Kim et al. 2008). Decyanation of CNCbl is required for it to be made available for conversion to active cofactors. MMACHC can remove the methyl (Me) and adenosyl (Ado) groups from MeCbl and AdoCbl respectively (not shown in this reaction), as well as CN from CNCbl.
R-HSA-3149539 (Reactome) Methionine synthase (MTR) catalyses the transfer of a methyl group from 5-methyltetrahydrofolate (MTHF) to homocysteine (HCYS) to then form methionine (L-Met). In the first step, MTR mediates the transfer of a methyl group from 5-methyltetrahydrofolate (MTHF) to cob(I)alamin (B12s, bound to the enzyme MTR) to form the cofactor methylcobalamin (MeCbl), the form that activates MTR (Leclerc et al. 1996). Defects in MTR cause methylcobalamin deficiency type G (cblG, methionine synthase deficiency; MIM:250940), an autosomal recessive inherited disease that causes mental retardation, macrocytic anemia, and homocystinuria (Leclerc et al. 1996).
R-HSA-3149560 (Reactome) Mitochondrial cob(I)yrinic acid a,c-diamide adenosyltransferase (MMAB) is an enzyme involved in the adenosylation of cob(I)alamin. In the first step, an unidentified reducing system reduces cob(II)alamin (B12r) to cob(I)alamin (B12s) (Fan & Bobik 2008, Leal et al. 2003).
R-HSA-3149563 (Reactome) Methylmalonic aciduria and homocystinuria type D protein (MMADHC) has sequence homology with a bacterial ATP-binding cassette transporter and contains a putative cobalamin binding motif and a putative mitochondrial targeting sequence which is thought to target cob(II)alamin (B12r) to the mitochondria (Stucki et al. 2012, Coelho et al. 2008). The actual mechanism of transport into the mitochondrion is unknown.
R-HSA-3159253 (Reactome) Mitochondrial cob(I)yrinic acid a,c-diamide adenosyltransferase (MMAB) is an enzyme involved in the adenosylation of cobalamin. MMAB transfers an adenosyl group from ATP to cob(I)alamin (B12s) to form adenosylcabalamin (AdoCbl) (Fan & Bobik 2008, Leal et al. 2003). Defects in MMAB cause methylmalonic aciduria type cblB (MMAB aka methylmalonic aciduria type B or vitamin B12-responsive methylmalonicaciduria of cblB complementation type; MIM:251110). Affected individuals have methylmalonic aciduria and metabolic ketoacidosis, despite a functional methylmalonyl-CoA mutase. In severe cases, newborns become severely acidotic and may die if acidosis is not treated promptly (Dobson et al. 2002).
R-HSA-3159259 (Reactome) Methylmalonyl-CoA mutase (MUT aka MCM) (Jansen et al. 1989) utilises adenosylcobalamin (AdoCbl) as a cofactor and catalyses interchange of a carbonyl-CoA group and a hydrogen atom in conversion of methymalonyl-CoA to form succinyl-CoA, a precursor for the citric acid cycle. MUT has a homodimeric structure and is located in the mitochondrial matrix. Defects in MUT cause methylmalonic aciduria type mut (MMAM; MIM:251000), an often fatal disorder of organic acid metabolism (Worgan et al. 2006).

Methylmalonic aciduria type A protein (MMAA) (Dobson et al. 2002) is thought to act as a chaperone to MUT and is suggested to play a dual role with regards to MUT protection and reactivation.

Defects in MMAA cause methylmalonic aciduria type cblA (MMAA aka methylmalonic aciduria type A or vitamin B12-responsive methylmalonicaciduria of cblA complementation type; MIM:251100). Affected individuals accumulate methylmalonic acid in the blood and urine and are prone to potentially life threatening acidotic crises in infancy or early childhood (Dobson et al. 2002, Lerner-Ellis et al. 2004).
R-HSA-3165230 (Reactome) The water-soluble vitamin riboflavin (RIB, vitamin B2) is essential for normal cellular functions. Three human riboflavin transporters mediate the transport of RIB into cells and play an important role in RIB homeostasis. The transporters are assigned to a new sub-family of the SLC superfamily; SLC52A1, SLC52A2 and SLC52A3 (aka RFVT1, RFVT2 and RFVT3 respectively). Solute carrier family 52, riboflavin transporter, member 1 (SLC52A1, RFVT1) is widely expressed with highest expression in the testis, placenta and small intestine (Yonezawa et al. 2008). Solute carrier family 52, riboflavin transporter, member 2 (SLC52A2, RFVT2) is highly expressed in brain, foetal brain and salivary gland (Yao et al. 2010). Solute carrier family 52, riboflavin transporter, member 3 (SLC52A3, RFVT3) transports riboflavin (RIB) from the lumen into small intestine epithelial cells (Yoshimatsu et al. 2014). Activity is inhibited by riboflavin analogues such as flavin mononucleotide (FMN) and flavin adenine dinucleotide (FAD) (Yao et al. 2010). Defects in SLC52A3 cause Brown-Vialetto-Van Laere syndrome type 1 (BVVLS1; MIM:211530). BVVLS1 is a rare autosomal recessive neurologic disorder characterised by sensorineural hearing loss and a variety of cranial nerve palsies (Green et al. 2010). Defects in SLC52A3 also cause Fazio-Londe disease (FALOND; MIM:211500), a rare neurological disease characterised by progressive weakness of the muscles innervated by cranial nerves located at the lower brain stem (Bosch et al. 2011).
R-HSA-3204311 (Reactome) Aldehyde oxidase (AOX1) is a complex molybdo-flavoprotein that belongs to the xanthine oxidase family. It is active as a homodimer, with each monomer binding two distinct [2Fe2S] clusters, FAD and the molybdenum cofactor. AOX1 plays an important role in the metabolism of drugs based on its broad substrate specificity oxidising aromatic aza-heterocycles and aldehydes (Hartmann et al. 2012).
R-HSA-3204318 (Reactome) Methionine synthase reductase (MTRR) is involved in reducing cob(II)alamin (B12r) to cob(I)alamin (B12s), the cofactor form used by methionine synthase (MTR). MTRR requires 1 FMN and 1 FAD per subunit for activity (Wolthers et al. 2007). MTRR exists a stable complex with MTR, bound through their FMN-binding and C-terminal activation domains respectively (Wolthers & Scrutton 2007, Wolthers & Scrutton 2009).
R-HSA-3245898 (Reactome) Transcobalamin 1 (TCN1 aka haptocorrin, HC, TCI) is a glycoprotein produced by many cells including gastric cells in response to go food intake (Johnston et al. 1989). It can also bind a large fraction of cobalamin (Cbl) in the general circulation. No functional significance for this general binding is presently known (Quadros 2010, Alpers & Russel-Jones 1999 (in Chemistry and Biochemistry of B12, Banerjee 1999)).
R-HSA-3323111 (Reactome) Once biotinylated, three halocarboxylases (hCBXs) are localised to the mitochondrial matrix. The mechanism of transfer is still unclear. Pyruvate carboxylase (PC) is required for gluconeogenesis, lipogenesis, neurotransmitter synthesis and insulin secretion; Methylcrotonyl-CoA carboxylase (MCC) is required for amino acid metabolism; propionyl-CoA carboxylase (PCC) is required for odd-chain fatty acid oxidation (Ingaramo & Beckett 2012, Hiratsuka et al. 1998, Bailey et al. 2010).
R-HSA-4167501 (Reactome) Cytosolic acetyl-CoA carboxylases 1 and 2 (Btn-ACACA/B:2Mn2+) are degraded proteolytically to biocytin (BCTN aka biotinyl-lysine) or small biotinyl peptides (not shown here) by an unknown protease (Chandler & Ballard 1985, Hymes & Wolf 1996, Hymes & Wolf 1999).
R-HSA-4167509 (Reactome) Human biotinidase (BTD, EC 3.5.1.12) (Cole et al. 1994) catalyzes the hydrolysis of biocytin (BCTN, aka biotinyl-lysine), a product of biotin dependent carboxylase degradation, to biotin (Btn) and lysine. As a result, Btn is again available to be used in the biotinylation of apo-carboxylases in the mitochondrion. BTD is both secreted from various cells and localised in the mitochondria (Wolf & Jensen 2005). BTD deficiency, an autosomal recessive disorder, results in a secondary Btn deficiency that leads to juvenile onset multiple carboxylase deficiency (MIM:253260) (Wolf et al. 1983).
R-HSA-4167511 (Reactome) Biotin (Btn) acts as a coenzyme for 5 carboxylases that exist in their inactive apo forms. In the cytosol and mitochondrion, these apo-carboxylases are biotinylated to their active holo forms by the activity of biotin protein ligase (HCLS) (Ingaramo & Beckett 2012, Bailey et al. 2010, Hiratsuka et al. 1998). Defects in HLCS causes holocarboxylase synthetase deficiency (HLCS deficiency aka early-onset multiple carboxylase deficiency; MIM:253270). HLCS deficiency is an autosomal recessive disorder whereby deficient HLCS activity results in reduced activity of all five carboxylases. Symptoms include metabolic acidosis, organic aciduria, lethargy, hypotonia, convulsions and dermatitis (Suzuki et al. 2005). The first committed step in the synthesis of fatty acids is performed by the biotin-dependent enzyme acetyl CoA carboxylase [EC 6.4.1.2]. Acetyl CoA carboxylases 1 and 2 (ACACA and ACACB) have one Btn moiety covalently attached to each subunit (Abu-Elheiga et al. 1995). Eukaryotic acetyl-CoA carboxylases are heterodimers that can form catalytically active extended oligomers (Weatherly et al. 2004). Unlike the other biotin-dependent carboxylases that reside inside the mitochondrion, ACACA and B are located in the cytosol and outer mitochondrial membrane (shown here) respectively (Abu-Elheiga et al. 2000).
R-HSA-5223313 (Reactome) ATP-binding cassette sub-family D member 4 (ABCD4), originally thought to be localised to the peroxisomal membrane, has since been demonstrated to colocalise with the lysosomal proteins LAMP1 and LMBD1. Mutations modifying the ATPase domain of ABCD4 can affect its function and suggests a role in the intracellular transport of cobalamin (Cbl, aka vitamin B12) (Coelho et al. 2012). Further evidence for this role comes from mutation studies in ABCD4 that can cause methylmalonic aciduria and homocystinuria type CblJ (MAHCJ; MIM:614857), a disorder of Cbl metabolism characterised by decreased levels of the coenzymes adenosylcobalamin (AdoCbl) and methylcobalamin (MeCbl). This disease mimics the cblF defect caused by LMBRD1 mutations (Coelho et al. 2012).
R-HSA-5693319 (Reactome) Digestive proteases are synthesised and secreted by the pancreas as inactive zymogens whose activation occur in the duodenum. Activation of trypsin (PRSS1) within the pancreas before secretion is thought to be a major initiating factor in chronic pancreatitis. Chymotrypsin-C (CTRC) is a pancreatic serine protease that regulates activation and degradation of trypsinogens and procarboxypeptidases by targeting specific cleavage sites within their zymogen precursors. CTRC regulates trypsinogen activation and stability by two opposing cleavage sites: it can cleave cationic trypsinogen either at Phe18-Asp19 in the activation peptide, leading to enhanced autoactivation or at Leu81-Glu82 within the Ca2+-binding loop, resulting in degradation (the latter not shown here) (Batra et al. 2013).
R-HSA-71010 (Reactome) Methylmalonyl CoA mutase (MUT aka MCM) (Jansen et al. 1989) utilises adenosylcobalamin (AdoCbl) as a cofactor and catalyzes interchange of a carbonyl-CoA group and a hydrogen atom in conversion of methylmalonyl CoA to form succinyl CoA, a precursor for the citric acid cycle. MUT has a homodimeric structure and is located in the mitochondrial matrix. Defects in MUT cause methylmalonic aciduria, mut type (MMAM; MIM:251000), an often fatal disorder of organic acid metabolism (Worgan et al. 2006).

Methylmalonic aciduria type A protein (MMAA) is thought to act as a chaperone to MUT, the enzyme which utilises adenosylcobalamin (AdoCbl) as a cofactor. MMAA is suggested to play a dual role with regards to MUT protection and reactivation. Some AdoCbl-dependent enzymes undergo suicide inactivation after catalysis due to the oxidative inactivation of Cbl. MMAA is thought to play a protective role to prevent MUT being inactivated in this way. After the catalytic cycle when MUT is inactive, MMAA increases the enzymatic activity of MUT through exchange of the damaged cofactor. Whether this happens via GTP-mediated hydrolysis is unknown at present (Takahashi-Iniguez et al. 2011, Froese et al. 2010). Bacterial AdoCbl-containing enzymes possess reactivating factors which release the inactivated cofactor to allow the resulting apoenzyme to reconstitute into an active form. A bacterial orthologue of MMAA, MeaB, forms a stable complex with MUT and plays a role in its protection and reactivation (Padovani & Banerjee 2006).

Defects in MMAA cause methylmalonic aciduria type cblA (cblA aka methylmalonic aciduria type A or vitamin B12-responsive methylmalonicaciduria of cblA complementation type; MIM:251100). Affected individuals accumulate methylmalonic acid in the blood and urine and are prone to potentially life threatening acidotic crises in infancy or early childhood (Dobson et al. 2002, Lerner-Ellis et al. 2004).
R-HSA-8875838 (Reactome) Mitochondrial thiamine pyrophosphate carrier (SLC25A19, DNC, MUP1) was originally thought to be a deoxyribonucleotide (DNC) carrier but has since been identified from enzyme kinetics, gene knockout studies and clinical samples from Amish Microcephaly (MCPHA) patients, to be a transporter of thiamine pyrophosphate (ThDP) into mitochondria (Kang & Samuels 2008). ThDP is a cofactor for the mitochondrial enzymes pyruvate dehydrogenase, alpha-ketoglutarate dehydrogenase, and branched chain amino acid dehydrogenase. The biochemical phenotype of MCPHA may be attributable to decreased activity of these enzymes (Siu et al. 2010).
R-HSA-8938300 (Reactome) Vanin (VNN1) is a membrane pantetheine hydrolase or pantetheinase (EC 3.56.1.-) (Maras et al. 1999, Martin et al. 2001), part of a cluster of three human orthologous genes (VNN1, VNN2, VNN3) on Chr. 6q22-24 (Kaskow et al. 2012, Boersma et al. 2014). VNN3 is a pseudogene in humans. Vanins catalyse the hydrolysis of pantetheine to pantothenic acid (PanK, vitamin B5) and cysteamine (2AET), a powerful anti-oxidant. PanK is the initial substrate for the synthesis of Coenzyme A (CoA-SH).
R-HSA-8938314 (Reactome) Coenzyme A (CoA-SH) in serum can be hydrolysed by ectonucleotide pyrophosphatases (ENPPs) (Goding et al. 2003), which have pantothenate kinase activity. The products of this are adenosine 3',5'-bismonophosphate (PAP) and 4′-phosphopantetheine (PPANT), which is able to translocate into cells providing an alternative source for intracellular coenzyme A biosynthesis (Srinivasan et al. 2015).
R-HSA-8939039 (Reactome) 4-phosphopantetheine (PPANT) is a biologically stable molecule able to translocate through the cell membranes (Srinivasan et al. 2015).
R-HSA-947499 (Reactome) While the biosynthesis of the molybdenum cofactor for sulfite oxidase is finished after molybdenum ion insertion, human xanthine oxidase and aldehyde oxidase will only show activity with this cofactor when one of the oxygens bound to molybdenum is replaced with sulfur. The exchange is catalyzed by the MOCOS cysteine desulfurase (Ichida et al, 2001).
R-HSA-947514 (Reactome) In order to get a sulfur atom for subsequent sulfuration reactions, cysteine is first desulfurated by NFS1 which transfers it onto a cysteine of MOCS3, yielding a protein persulfide (Marelja et al, 2008).
R-HSA-947531 (Reactome) Gephyrin, which stabilizes receptors on neuronal membranes, also catalyzes the transfer of a molybdenum ion onto the cofactor. The mechanism was elucidated in plants but, as the pathway is highly conserved, human gephyrin can complement missing plant proteins. Doubts remain about the actual molybdenum donor, probably molybdate, and whether a copper ion is possibly bound and removed (Stallmeyer et al, 1999).
R-HSA-947535 (Reactome) GTP cyclizes in a reaction involving radicals of S-adenosylmethionine, catalyzed by the iron-sulfur cluster dimeric MOCS1. The intermediate result is called precursor Z (Hanzelmann et al, 2002; Hanzelmann et al, 2004).
R-HSA-947538 (Reactome) Sulfur transfer onto MOCS2A is closely preceded by its adenylylation and deadenylylation. After release of MOCS2A-CO-S(1-), two cysteines on MOCS3 form a disulfide bridge. This means that MOCS3 has to be reduced to be able to participate in the next round. The reducing agent is not known (Marelja et al, 2008).
R-HSA-947541 (Reactome) After the MOCS2A dimer is loaded with two sulfur atoms, their sequential deposition on the precursor Z molecule, with ring cleavage, is catalyzed by the MOCS2B half of the MOCS2 tetramer (Leimkuhler et al, 2003; Wuebbens & Rajagopalan, 2002).
R-HSA-9640302 (Reactome) The ascorbate radical (Asc.-) easily donates an electron, forming a stable radical which dissociates into ascorbate (AscH-), the dominant form at physiological pH, and dehydroascorbate (DeHA). This reaction is the basis for its antioxidant properties (Du et al. 2013).
R-HSA-9640307 (Reactome) If peroxide is not present, dehydroascorbate (DeHA) quickly hydrolyses to 2,3-diketogulonate (2,3-DKG) (Simpson & Ortwerth 2000).
R-HSA-9640316 (Reactome) Ascorbate can autoxidise, generating superoxide and its dismutation product H2O2. The resulting dehydroascorbate (DeHA) gets oxidised by H2O2 and hydrolyses to threonate and oxalate (Simpson & Ortwerth 2000).
R-HSA-9640321 (Reactome) 2,3-Diketogulonate (2,3-DKG) further hydrolyses into erythrulose (ERU) and oxalate (Simpson & Ortwerth 2000).
R-HSA-964958 (Reactome) Pyridoxal kinase (PDXK) catalyzes the ATP-dependent phosphorylation of pyridoxamine (PXA) to form pyridoxamine phosphate (PXAP) (Lee et al. 2000, di Salvo et al. 2004).
R-HSA-964962 (Reactome) Pyridoxal kinase (PDXK) catalyzes the ATP-dependent phosphorylation of pyridoxine (PDX) to form pyridoxine phosphate (PDXP) (Lee et al. 2000, di Salvo et al. 2004).
R-HSA-964970 (Reactome) Pyridoxal kinase (PDXK) catalyzes the ATP-dependent phosphorylation of pyridoxal (PXL) to form pyridoxal 5'-phosphate (PXLP) (Lee et al. 2000, di Salvo et al. 2004).
R-HSA-965019 (Reactome) Pyridoxine-5'-phosphate oxidase (PNPO) is able to oxidize pyridoxine phosphate (PDXP) to pyridoxal 5'-phosphate (PXLP) (Kang et al. 2004).
R-HSA-965067 (Reactome) Thiamin triphosphate (ThTP) can transfer phosphate to a few proteins. Animal tissues contain a membrane-associated as well as a soluble thiamine triphosphatase that can dephosphorylate ThTP. Only the soluble enzyme was characterized in calf (Lakaye et al, 2002).
R-HSA-965079 (Reactome) Pyridoxine-5'-phosphate oxidase (PNPO) is able to oxidize pyridoxamine phosphate (PXAP) to pyridoxal 5'-phosphate (PXLP) (Kang et al. 2004).
R-HSA-997381 (Reactome) Thiamin triphosphate (ThTP) is believed to be synthesized from thiamin diphosphate (ThDP), catalyzed by ThDP kinase (TDPK), an enzyme that remains poorly characterized (Nishino et al, 1983).
RFK:Mg2+mim-catalysisR-HSA-196964 (Reactome)
RIBArrowR-HSA-196950 (Reactome)
RIBArrowR-HSA-3165230 (Reactome)
RIBR-HSA-196964 (Reactome)
RIBR-HSA-3165230 (Reactome)
SLC19A2/3mim-catalysisR-HSA-199626 (Reactome)
SLC23A1,2mim-catalysisR-HSA-198870 (Reactome)
SLC25A16mim-catalysisR-HSA-199216 (Reactome)
SLC25A19mim-catalysisR-HSA-8875838 (Reactome)
SLC2A1,3mim-catalysisR-HSA-198818 (Reactome)
SLC52A1,2,3mim-catalysisR-HSA-3165230 (Reactome)
SLC5A6:PDZD11mim-catalysisR-HSA-199206 (Reactome)
SLC5A6:PDZD11mim-catalysisR-HSA-199219 (Reactome)
SOG-MOCS2ArrowR-HSA-947538 (Reactome)
SUCC-CoAArrowR-HSA-71010 (Reactome)
TCII:Cbl:CD320ArrowR-HSA-3000122 (Reactome)
TCII:Cbl:CD320R-HSA-3000109 (Reactome)
TCII:CblArrowR-HSA-3000074 (Reactome)
TCII:CblArrowR-HSA-3000109 (Reactome)
TCII:CblArrowR-HSA-3000112 (Reactome)
TCII:CblR-HSA-3000112 (Reactome)
TCII:CblR-HSA-3000122 (Reactome)
TCII:CblR-HSA-3000263 (Reactome)
TCIIR-HSA-3000074 (Reactome)
TCN1:CblArrowR-HSA-3132759 (Reactome)
TCN1:CblArrowR-HSA-3245898 (Reactome)
TCN1:CblR-HSA-3132753 (Reactome)
TCN1R-HSA-3132759 (Reactome)
TCN1R-HSA-3245898 (Reactome)
TDPKmim-catalysisR-HSA-997381 (Reactome)
THFArrowR-HSA-3149539 (Reactome)
THMNArrowR-HSA-199626 (Reactome)
THMNR-HSA-196761 (Reactome)
THMNR-HSA-199626 (Reactome)
THTPA:Mg2+mim-catalysisR-HSA-965067 (Reactome)
ThDPArrowR-HSA-196761 (Reactome)
ThDPArrowR-HSA-8875838 (Reactome)
ThDPArrowR-HSA-965067 (Reactome)
ThDPR-HSA-8875838 (Reactome)
ThDPR-HSA-997381 (Reactome)
ThTPArrowR-HSA-997381 (Reactome)
ThTPR-HSA-965067 (Reactome)
VNN1,VNN2mim-catalysisR-HSA-8938300 (Reactome)
cob(I)alaminArrowR-HSA-3149560 (Reactome)
cob(I)alaminR-HSA-3159253 (Reactome)
cob(II)alaminArrowR-HSA-3149492 (Reactome)
cob(II)alaminArrowR-HSA-3149563 (Reactome)
cob(II)alaminR-HSA-3149560 (Reactome)
cob(II)alaminR-HSA-3204318 (Reactome)
dADEArrowR-HSA-947535 (Reactome)
hCBXsArrowR-HSA-3323111 (Reactome)
hCBXsR-HSA-3065959 (Reactome)
hCBXsR-HSA-3323111 (Reactome)
holo-MOCS1mim-catalysisR-HSA-947535 (Reactome)
oxalateArrowR-HSA-9640316 (Reactome)
oxalateArrowR-HSA-9640321 (Reactome)
sulfurated MoCoArrowR-HSA-947499 (Reactome)
threonateArrowR-HSA-9640316 (Reactome)
unknown

cob(II)alamin

reductase
mim-catalysisR-HSA-3149560 (Reactome)
unknown peptidasemim-catalysisR-HSA-3065958 (Reactome)
unknown peptidasemim-catalysisR-HSA-3065959 (Reactome)
unknown peptidasemim-catalysisR-HSA-4167501 (Reactome)
unknown proteasemim-catalysisR-HSA-3000243 (Reactome)

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