NAD molecules have a short half-life (90 minute), so even though they are not consumed during oxidation reactions, they are degraded by certain enzymes. When they are degraded, the pyrimidine moiety of the molecule can be recovered through NAD salvaging cycles. This pathway is responsible for two things: the recycling of Nicotinamide ribotide and Nicotinamide and the absorption of of exogenous NAD+.
Bork P, Koonin EV; ''A P-loop-like motif in a widespread ATP pyrophosphatase domain: implications for the evolution of sequence motifs and enzyme activity.''; Proteins, 1994 PubMedEurope PMCScholia
Baecker PA, Yung SG, Rodriguez M, Austin E, Andreoli AJ; ''Periplasmic localization of nicotinate phosphoribosyltransferase in Escherichia coli.''; J Bacteriol, 1978 PubMedEurope PMCScholia
Gerdes SY, Scholle MD, D'Souza M, Bernal A, Baev MV, Farrell M, Kurnasov OV, Daugherty MD, Mseeh F, Polanuyer BM, Campbell JW, Anantha S, Shatalin KY, Chowdhury SA, Fonstein MY, Osterman AL; ''From genetic footprinting to antimicrobial drug targets: examples in cofactor biosynthetic pathways.''; J Bacteriol, 2002 PubMedEurope PMCScholia
Ozment C, Barchue J, DeLucas LJ, Chattopadhyay D; ''Structural study of Escherichia coli NAD synthetase: overexpression, purification, crystallization, and preliminary crystallographic analysis.''; J Struct Biol, 1999 PubMedEurope PMCScholia
Jauch R, Humm A, Huber R, Wahl MC; ''Structures of Escherichia coli NAD synthetase with substrates and products reveal mechanistic rearrangements.''; J Biol Chem, 2005 PubMedEurope PMCScholia
Foster JW, Baskowsky-Foster AM; ''Pyridine nucleotide cycle of Salmonella typhimurium: in vivo recycling of nicotinamide adenine dinucleotide.''; J Bacteriol, 1980 PubMedEurope PMCScholia
De Lay N, Gottesman S; ''The Crp-activated small noncoding regulatory RNA CyaR (RyeE) links nutritional status to group behavior.''; J Bacteriol, 2009 PubMedEurope PMCScholia
Galeazzi L, Bocci P, Amici A, Brunetti L, Ruggieri S, Romine M, Reed S, Osterman AL, Rodionov DA, Sorci L, Raffaelli N; ''Identification of nicotinamide mononucleotide deamidase of the bacterial pyridine nucleotide cycle reveals a novel broadly conserved amidohydrolase family.''; J Biol Chem, 2011 PubMedEurope PMCScholia
Hillyard D, Rechsteiner M, Manlapaz-Ramos P, Imperial JS, Cruz LJ, Olivera BM; ''The pyridine nucleotide cycle. Studies in Escherichia coli and the human cell line D98/AH2.''; J Biol Chem, 1981 PubMedEurope PMCScholia
Isaksson LA, Takata R; ''The temperature sensitive mutant 72c. I. Pleiotropic growth behaviour and changed response to some antibiotics and mutations in the transcription or translation apparatus.''; Mol Gen Genet, 1978 PubMedEurope PMCScholia
Park UE, Roth JR, Olivera BM; ''Salmonella typhimurium mutants lacking NAD pyrophosphatase.''; J Bacteriol, 1988 PubMedEurope PMCScholia
Dahmen W, Webb B, Preiss J; ''The deamido-diphosphopyridine nucleotide and diphosphopyridine nucleotide pyrophosphorylases of Escherichia coli and yeast.''; Arch Biochem Biophys, 1967 PubMedEurope PMCScholia
Khil PP, Camerini-Otero RD; ''Over 1000 genes are involved in the DNA damage response of Escherichia coli.''; Mol Microbiol, 2002 PubMedEurope PMCScholia
Allibert P, Willison JC, Vignais PM; ''Complementation of nitrogen-regulatory (ntr-like) mutations in Rhodobacter capsulatus by an Escherichia coli gene: cloning and sequencing of the gene and characterization of the gene product.''; J Bacteriol, 1987 PubMedEurope PMCScholia
IMSANDE J; ''Pathway of diphosphopyridine nucleotide biosynthesis in Escherichia coli.''; J Biol Chem, 1961 PubMedEurope PMCScholia
Pardee AB, Benz EJ Jr, St Peter DA, Krieger JN, Meuth M, Trieshmann HW Jr; ''Hyperproduction and purification of nicotinamide deamidase, a microconstitutive enzyme of Escherichia coli.''; J Biol Chem, 1971 PubMedEurope PMCScholia
Foster JW, Kinney DM, Moat AG; ''Pyridine nucleotide cycle of Salmonella typhimurium: isolation and characterization of pncA, pncB, and pncC mutants and utilization of exogenous nicotinamide adenine dinucleotide.''; J Bacteriol, 1979 PubMedEurope PMCScholia
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diphosphate
riboseadenine
dinucleotideAnnotated Interactions
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