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ENZYME

ENZYME entry: EC 2.4.99.20

PURL: https://purl.expasy.org/enzyme/EC/2.4.99.20
Accepted Name
2'-phospho-ADP-ribosyl cyclase/2'-phospho-cyclic-ADP-ribose transferase
Alternative Name(s)
diphosphopyridine nucleosidase
Reaction catalysed
nicotinate + NADP(+) = NAADP(+) + nicotinamide
Comment(s)
  • This multiunctional enzyme catalyzes both the removal of nicotinamide from NADP(+), forming 2'-phospho-cyclic ADP-ribose, and the addition of nicotinate to the cyclic product, forming NAADP(+), a calcium messenger that can mobilize intracellular Ca(2+) stores and activate Ca(2+) influx to regulate a wide range of physiological processes.
  • In addition, the enzyme also catalyzes EC 3.2.2.6.
Cross-references
BRENDA2.4.99.20
EC2PDB2.4.99.20
ExplorEnz2.4.99.20
KEGG Ligand Database for Enzyme Nomenclature2.4.99.20
IUBMB Enzyme Nomenclature2.4.99.20
MEDLINEFind literature relating to 2.4.99.20
MetaCyc2.4.99.20
Rhea expert-curated reactions2.4.99.20
UniProtKB/Swiss-Prot
P28907, CD38_HUMANQ5VAN0, CD38_MACFAP56528, CD38_MOUSE
Q9MZ03, CD38_RABITQ64244, CD38_RATP29241, NADA_APLCA
Q27312, NADA_APLKU

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