1FCE

PROCESSIVE ENDOCELLULASE CELF OF CLOSTRIDIUM CELLULOLYTICUM


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.210 
  • R-Value Work: 0.165 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

The crystal structure of the processive endocellulase CelF of Clostridium cellulolyticum in complex with a thiooligosaccharide inhibitor at 2.0 A resolution.

Parsiegla, G.Juy, M.Reverbel-Leroy, C.Tardif, C.Belaich, J.P.Driguez, H.Haser, R.

(1998) EMBO J. 17: 5551-5562

  • DOI: 10.1093/emboj/17.19.5551

  • PubMed Abstract: 
  • The mesophilic bacterium Clostridium cellulolyticum exports multienzyme complexes called cellulosomes to digest cellulose. One of the three major components of the cellulosome is the processive endocellulase CelF. The crystal structure of the catalyt ...

    The mesophilic bacterium Clostridium cellulolyticum exports multienzyme complexes called cellulosomes to digest cellulose. One of the three major components of the cellulosome is the processive endocellulase CelF. The crystal structure of the catalytic domain of CelF in complex with two molecules of a thiooligosaccharide inhibitor was determined at 2.0 A resolution. This is the first three-dimensional structure to be solved of a member of the family 48 glycosyl hydrolases. The structure consists of an (alpha alpha)6-helix barrel with long loops on the N-terminal side of the inner helices, which form a tunnel, and an open cleft region covering one side of the barrel. One inhibitor molecule is enclosed in the tunnel, the other exposed in the open cleft. The active centre is located in a depression at the junction of the cleft and tunnel regions. Glu55 is the proposed proton donor in the cleavage reaction, while the corresponding base is proposed to be either Glu44 or Asp230. The orientation of the reducing ends of the inhibitor molecules together with the chain translation through the tunnel in the direction of the active centre indicates that CelF cleaves processively cellobiose from the reducing to the non-reducing end of the cellulose chain.


    Organizational Affiliation

    Laboratoire d'Architecture et Fonction des Macromolécules Biologiques, Institut de Biologie Structurale et Microbiologie, Centre National de la Recherche Scientifique, Marseille cedex 20, France.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
CELLULASE CELF
A
629Clostridium cellulolyticum (strain ATCC 35319 / DSM 5812 / JCM 6584 / H10)Gene Names: celCCF
EC: 3.2.1.4
Find proteins for P37698 (Clostridium cellulolyticum (strain ATCC 35319 / DSM 5812 / JCM 6584 / H10))
Go to UniProtKB:  P37698
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CA
Query on CA

Download SDF File 
Download CCD File 
A
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
BGC
Query on BGC

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Download CCD File 
A
BETA-D-GLUCOSE
C6 H12 O6
WQZGKKKJIJFFOK-VFUOTHLCSA-N
 Ligand Interaction
MGL
Query on MGL

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Download CCD File 
A
O1-METHYL-GLUCOSE
C7 H14 O6
HOVAGTYPODGVJG-XUUWZHRGSA-N
 Ligand Interaction
SGC
Query on SGC

Download SDF File 
Download CCD File 
A
4-DEOXY-4-THIO-BETA-D-GLUCOPYRANOSE
C6 H12 O5 S
KGSURTOFVLAWDC-QZABAPFNSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.210 
  • R-Value Work: 0.165 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 61.450α = 90.00
b = 84.540β = 90.00
c = 121.940γ = 90.00
Software Package:
Software NamePurpose
X-PLORmodel building
X-PLORphasing
X-PLORrefinement
DENZOdata reduction
CCP4data scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1999-07-22
    Type: Initial release
  • Version 1.1: 2008-03-24
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance