ISDA

Deposition Date 1996-09-18

Release Date 1997-09-17

Last Version Date 2024-11-06

Entry Detail

PDB ID:

1LBE

Keywords:

HYDROLASE

Title:

APLYSIA ADP RIBOSYL CYCLASE

Biological Source:

Source Organism:

Aplysia californica (Taxon ID: 6500)

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

2.40 Å

R-Value Free:

0.29

R-Value Work:

0.21

R-Value Observed:

0.21

Space Group:

P 21 21 21

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Macromolecular Entities

Protein Blast

Polymer Type:polypeptide(L)
Molecule:ADP RIBOSYL CYCLASE
Chain IDs:A, B
Chain Length:258
Number of Molecules:2
Biological Source:Aplysia californica

UniProt ID:P29241 Pfam ID:PF02267 EC:2.4.99.20

Primary Citation

Crystal structure of Aplysia ADP ribosyl cyclase, a homologue of the bifunctional ectozyme CD38.

Prasad, G.S, McRee, D.E, Stura, E.A, Levitt, D.G, Lee, H.C, Stout, C.D, Pradas, G.S, Levitt, D.G, Lee, H.C, Stout, C.D.Show

Nat.Struct.Biol. 3 957 964 (1996)

PMID: 8901875 DOI: 10.1038/nsb1196-957

Abstact

ADP ribosyl cyclase synthesizes the novel secondary messenger cyclic ADP ribose (cADPR) utilizing NAD as a substrate. The enzyme shares extensive sequence similarity with two lymphocyte antigens, CD38 and BST-1, which hydrolyse as well as synthesize cADPR. The crystal structure provides a model for these cell surface enzymes. Cyclase contains two spatially separated pockets composed of sequence conserved residues, suggesting that the cyclization reaction may entail use of distinct sites. The enzyme dimer encloses a cavity which may entrap the intermediate, ADP ribose.

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Primary Citation of related structures