Biomarkers for urea cycle disorders (Homo sapiens)
From WikiPathways
Description
The urea cycle converts toxic nitrogenous compounds to excretable urea in five biochemical reactions. It is also the source for endogenous arginine, ornithine and citrulline production. The process mainly takes place in the liver, partly in the mitochondria and partly in the cytoplasm of the hepatocytes.
Because there is no alternative way to convert toxic nitrogenous compounds, defects in the enzymes or transporters can lead to several diseases (diseases highlighted in pink). The diseases are characterised by hyperammonemia, respiratory alkalosis and encephalopathy and the severity of the disease depends on the severity of the defect and the place of the defect in the cycle. Severe forms usually have an onset in infancy, while mild forms can also present in adulthood.
This pathway is based on: Mew NA, et al. Urea cycle disorders overview (2003) [1]Quality Tags
Ontology Terms
Bibliography
- Humm A, Fritsche E, Steinbacher S, Huber R; ''Crystal structure and mechanism of human L-arginine:glycine amidinotransferase: a mitochondrial enzyme involved in creatine biosynthesis.''; EMBO J, 1997 PubMed Europe PMC Scholia
- Tapiero H, Mathé G, Couvreur P, Tew KD; ''II. Glutamine and glutamate.''; Biomed Pharmacother, 2002 PubMed Europe PMC Scholia
- Ah Mew N, Simpson KL, Gropman AL, Lanpher BC, Chapman KA, Summar ML; ''Urea Cycle Disorders Overview''; , 1993 PubMed Europe PMC Scholia
History
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External references
DataNodes
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Name | Type | Database reference | Comment |
---|---|---|---|
ALAT | Protein | P24298 (Uniprot-TrEMBL) | aka Alanine aminotransferase |
ARG1 | Protein | P05089 (Uniprot-TrEMBL) | |
ASAT | Protein | P17174 (Uniprot-TrEMBL) | aka Aspartate aminotransferase |
ASL | Protein | P04424 (Uniprot-TrEMBL) | |
ASS1 | Protein | P00966 (Uniprot-TrEMBL) | |
Alanine and aspartate metabolism | Pathway | WP106 (WikiPathways) | |
Amino Acid metabolism | Pathway | WP3925 (WikiPathways) | |
Arginine | Metabolite | CHEBI:32682 (ChEBI) | |
Argininosuccinate | Metabolite | CHEBI:57472 (ChEBI) | |
Aspartate | Metabolite | CHEBI:29991 (ChEBI) | |
Biochemical Pathways Part I | Pathway | WP3604 (WikiPathways) | |
Blood Clotting Cascade | Pathway | WP272 (WikiPathways) | |
Carbamoyl-phosphate | Metabolite | CHEBI:58228 (ChEBI) | |
Citrulline | Metabolite | CHEBI:57743 (ChEBI) | |
Creatine | Metabolite | CHEBI:57947 (ChEBI) | |
Factor VII | Protein | P08709 (Uniprot-TrEMBL) | |
Factor X | Protein | P00742 (Uniprot-TrEMBL) | |
Fumarate | Metabolite | CHEBI:29806 (ChEBI) | |
GAMT | Protein | Q14353 (Uniprot-TrEMBL) | |
GATM | Protein | P50440 (Uniprot-TrEMBL) | |
GLS2 | Protein | Q9UI32 (Uniprot-TrEMBL) | |
Galactose | Metabolite | HMDB0000143 (HMDB) | |
Glutamate | Metabolite | CHEBI:29985 (ChEBI) | |
Glutamine | Metabolite | CHEBI:58359 (ChEBI) | |
Guanidinoacetate | Metabolite | CHEBI:57742 (ChEBI) | |
Homocitrulline | Metabolite | CHEBI:58148 (ChEBI) | |
Methionine | Metabolite | HMDB0033951 (HMDB) | |
N-acetylglutamate | Metabolite | CHEBI:44337 (ChEBI) | |
NAGS | Protein | Q8N159 (Uniprot-TrEMBL) | |
NH4+ | Metabolite | CHEBI:28938 (ChEBI) | |
OTC | Protein | P00480 (Uniprot-TrEMBL) | |
Ornithine | Metabolite | CHEBI:46911 (ChEBI) | |
Orotate | Metabolite | HMDB0000226 (HMDB) | |
Pyrimidine metabolism | Pathway | WP4225 (WikiPathways) | |
Threonine | Metabolite | HMDB0000167 (HMDB) | |
Tyrosine | Metabolite | HMDB0000158 (HMDB) | |
Urea cycle | Pathway | WP4571 (WikiPathways) | |
Urea | Metabolite | CHEBI:16199 (ChEBI) |
Annotated Interactions
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Source | Target | Type | Database reference | Comment |
---|---|---|---|---|
Arginine | Guanidinoacetate | mim-conversion | 13202 (Rhea) | |
Arginine | mim-conversion | 20570 (Rhea) | ||
Argininosuccinate | Arginine | mim-conversion | 24021 (Rhea) | |
Aspartate | mim-conversion | 10933 (Rhea) | ||
Carbamoyl-phosphate | Citrulline | mim-conversion | 19514 (Rhea) | |
Carbamoyl-phosphate | Homocitrulline | mim-conversion | 17122 (Rhea) | |
Citrulline | Argininosuccinate | mim-conversion | 10933 (Rhea) | |
Fumarate | mim-conversion | 24021 (Rhea) | ||
Glutamate | N-acetylglutamate | mim-conversion | 24293 (Rhea) | |
Glutamine | Glutamate | mim-conversion | 15890 (Rhea) | |
Guanidinoacetate | Creatine | mim-conversion | 10657 (Rhea) | |
NH4+ | Carbamoyl-phosphate | mim-conversion | 18030 (Rhea) | |
NH4+ | mim-conversion | 15890 (Rhea) | ||
Ornithine | mim-conversion | 19514 (Rhea) | ||
mim-conversion | 20570 (Rhea) |