1CEM

ENDOGLUCANASE A (CELA) CATALYTIC CORE, RESIDUES 33-395

• PDB DOI: https://doi.org/10.2210/pdb1CEM/pdb

• Classification: GLYCOSYLTRANSFERASE
• Organism(s): Acetivibrio thermocellus
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 1995-12-04 Released: 1997-01-11 
• Deposition Author(s): Alzari, P.M.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.65 Å
• R-Value Free: 0.191 
• R-Value Work: 0.162 
• R-Value Observed: 0.162 

Literature

The crystal structure of endoglucanase CelA, a family 8 glycosyl hydrolase from Clostridium thermocellum.

Alzari, P.M., Souchon, H., Dominguez, R.

(1996) Structure 4: 265-275

• PubMed: 8805535 
• DOI: https://doi.org/10.1016/s0969-2126(96)00031-7
• Primary Citation of Related Structures:  
  1CEM


• PubMed Abstract: 
  

  Cellulases, which catalyze the hydrolysis of glycosidic bonds in cellulose, can be classified into several different protein families. Endoglucanase CelA is a member of glycosyl hydrolase family 8, a family for which no structural information was previously available.

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Organizational Affiliation: 

Unité d'lmmunologie Structurale and URA 1961 CNRS, Institut Pasteur, Paris, France.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 40.35 kDa 
• Atom Count: 3,115 
• Modelled Residue Count: 363 
• Deposited Residue Count: 363 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
CELLULASE CELA (1,4-BETA-D-GLUCAN-GLUCANOHYDROLASE)	A	363	Acetivibrio thermocellus	Mutation(s): 0  Gene Names: CELA EC: 3.2.1.4
UniProt
Find proteins for A3DC29 (Acetivibrio thermocellus (strain ATCC 27405 / DSM 1237 / JCM 9322 / NBRC 103400 / NCIMB 10682 / NRRL B-4536 / VPI 7372)) Explore A3DC29  Go to UniProtKB:  A3DC29

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.65 Å
• R-Value Free: 0.191 
• R-Value Work: 0.162 
• R-Value Observed: 0.162 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 50.118	α = 90
b = 63.518	β = 90
c = 104.974	γ = 90

Software Package:

Software Name	Purpose
X-PLOR	refinement
DENZO	data reduction

Structure Validation

Entry History 

Deposition Data

• Released Date: 1997-01-11 
Deposition Author(s): Alzari, P.M.

Revision History  

• Version 1.0: 1997-01-11
  Type: Initial release
  
• Version 1.1: 2008-03-24
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2024-02-07
  Changes: Data collection, Database references, Other