1LBE

APLYSIA ADP RIBOSYL CYCLASE

• PDB DOI: https://doi.org/10.2210/pdb1LBE/pdb

• Classification: HYDROLASE
• Organism(s): Aplysia californica
• Mutation(s): No 


• Deposited: 1996-09-18 Released: 1997-09-17 
• Deposition Author(s): Prasad, G.S., Mcree, D.E., Stura, E.A., Levitt, D.G., Lee, H.C., Stout, C.D.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.40 Å
• R-Value Free: 0.299 
• R-Value Work: 0.214 
• R-Value Observed: 0.214 

Literature

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.

(1996) Nat Struct Biol 3: 957-964

• PubMed: 8901875 
• DOI: https://doi.org/10.1038/nsb1196-957
• Primary Citation of Related Structures:  
  1LBE


• PubMed Abstract: 
  

  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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Organizational Affiliation: 

Department of Molecular Biology, Scripps Research Institute, La Jolla, California 92037, USA.

Biological Assembly 1  

Global Symmetry: Cyclic - C2  (Explore in 3D)
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 59.16 kDa 
• Atom Count: 4,064 
• Modelled Residue Count: 498 
• Deposited Residue Count: 516 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
ADP RIBOSYL CYCLASE	A, B	258	Aplysia californica	Mutation(s): 0  EC: 3.2.2.5
UniProt
Find proteins for P29241 (Aplysia californica) Explore P29241  Go to UniProtKB:  P29241

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.40 Å
• R-Value Free: 0.299 
• R-Value Work: 0.214 
• R-Value Observed: 0.214 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 70.2	α = 90
b = 72.3	β = 90
c = 125.2	γ = 90

Software Package:

Software Name	Purpose
MOSFLM	data reduction
CCP4	data reduction
X-PLOR	model building
X-PLOR	refinement
CCP4	data scaling
X-PLOR	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 1997-09-17 
Deposition Author(s): Prasad, G.S., Mcree, D.E., Stura, E.A., Levitt, D.G., Lee, H.C., Stout, C.D.

Revision History  

• Version 1.0: 1997-09-17
  Type: Initial release
  
• Version 1.1: 2008-03-24
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance