CATH Classification

Domain Context

CATH Clusters

Superfamily NAD(P)-binding Rossmann-like Domain
Functional Family

Enzyme Information

2.4.99.20
2'-phospho-ADP-ribosyl cyclase/2'-phospho-cyclic-ADP-ribose transferase.
based on mapping to UniProt P29241
NADP(+) + nicotinate = nicotinate-adenine dinucleotide phosphate + nicotinamide.
-!- 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.
3.2.2.6
ADP-ribosyl cyclase/cyclic ADP-ribose hydrolase.
based on mapping to UniProt P29241
NAD(+) + H(2)O = ADP-D-ribose + nicotinamide.
-!- This multiunctional enzyme catalyzes both the synthesis and hydrolysis of cyclic ADP-ribose, 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 2.4.99.20. -!- It is also able to act on beta-nicotinamide D-ribonucleotide. -!- Cf. EC 3.2.2.5.

UniProtKB Entries (1)

P29241
NADA_APLCA
Aplysia californica
ADP-ribosyl cyclase/cyclic ADP-ribose hydrolase

PDB Structure

PDB 3ZWX
External Links
Method X-RAY DIFFRACTION
Organism
Primary Citation
Structural Studies of Intermediates Along the Cyclization Pathway of Aplysia Adp-Ribosyl Cyclase.
Kotaka, M., Graeff, R., Chen, Z., Zhang, L.H., Lee, H.C., Hao, Q.
To be Published