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  Domain Name: Rib_hydrolase
ADP-ribosyl cyclase, also known as cyclic ADP-ribose hydrolase or CD38. ADP-ribosyl cyclase (EC:3.2.2.5) synthesizes the second messenger cyclic-ADP ribose (cADPR), which in turn releases calcium from internal stores. Mammals possess two membrane proteins, CD38 and BST-1/CD157, which exhibit ADP-ribosyl cyclase activity, as well as intracellular soluble ADP-ribose cyclases. CD38 is involved in differentiation, adhesion, and cell proliferation, and has been implicated in diseases such as AIDS, diabetes, and B-cell chronic lymphocytic leukemia. The extramembrane domain of CD38 acts as a multifunctional enzyme, and can synthesize cADPR from NAD+, hydrolyze NAD+ and cADPR to ADPR, as well as catalyze the exchange of the nicotinamide group of NADP+ with nicotinic acid under acidic conditions, to yield NAADP+ (nicotinic acid-adenine dinucleotide phosphate), a metabolite involved in Ca2+ mobilization from acidic stores.
No pairwise interactions are available for this conserved domain.

Total Mutations Found: 4
Total Disease Mutations Found: 0
This domain occurred 2 times on human genes (3 proteins).




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Range on the Protein:  

   Protein ID            Protein Position

Domain Position:  


Feature Name:Total Found:
NAD binding site















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Please Cite: Peterson, T.A., Adadey, A., Santana-Cruz ,I., Sun, Y., Winder A, Kann, M.G., (2010) DMDM: Domain Mapping of Disease Mutations. Bioinformatics 26 (19), 2458-2459.

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