1FBO

Crystal structure of the cellulase CEL48F from C. cellulolyticum in complex with cellobiitol


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.3 Å
  • R-Value Free: 0.210 
  • R-Value Work: 0.166 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Crystal Structures of the Cellulase Cel48F in Complex with Inhibitors and Substrates Give Insights Into its Processive Action

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

(2000) Biochemistry 39: 11238-11246

  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Cellulase Cel48F from Clostridium cellulolyticum was described as a processive endo-cellulase. The active site is composed of a 25 A long tunnel which is followed by an open cleft. During the processive action, the cellulose substrate has to slide th ...

    Cellulase Cel48F from Clostridium cellulolyticum was described as a processive endo-cellulase. The active site is composed of a 25 A long tunnel which is followed by an open cleft. During the processive action, the cellulose substrate has to slide through the tunnel to continuously supply the leaving group site with sugar residues after the catalytic cleavage. To study this processive action in the tunnel, the native catalytic module of Cel48F and the inactive mutant E55Q, have been cocrystallized with cellobiitol, two thio-oligosaccharide inhibitors (PIPS-IG3 and IG4) and the cello-oligosaccharides cellobiose, -tetraose and -hexaose. Seven sub-sites in the tunnel section of the active center could be identified and three of the four previously reported sub-sites in the open cleft section were reconfirmed. The sub-sites observed for the thio-oligosaccharide inhibitors and oligosaccharides, respectively, were located at two different positions in the tunnel corresponding to a shift in the chain direction of about a half sugar subunit. These two positions have different patterns of stacking interactions with aromatic residues present in the tunnel. Multiple patterns are not observed in nonprocessive endo-cellulases, where only one sugar position is favored by aromatic stacking. It is therefore proposed that the aromatic residues serve as lubricating agents to reduce the sliding barrier in the processive action.


    Related Citations: 
    • The crystal structure of the processive endocellulase CelF of Clostridium cellulolyticum in complex with a thiooligosaccharide inhibitor at 2.0 A
      Parsiegla, G.,Juy, M.,Reverbel-Leroy, C.,Tardif, C.,Belaich, J.P.,Driguez, H.,Haser, R.
      (1998) Embo J. 17: 5551


    Organizational Affiliation

    Institut de Biologie et Chimie des Protéines, Laboratoire de Bio-Cristallographie, Centre National de la Recherche Scientifique UMR 5086 and Université Claude Bernard Lyon I, 7 passage du Vercors, 69367 Lyon Cedex 07, France.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
ENDO-1,4-BETA-GLUCANASE F
A
629Clostridium cellulolyticum (strain ATCC 35319 / DSM 5812 / JCM 6584 / H10)Mutation(s): 0 
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 3 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
GLO
Query on GLO

Download SDF File 
Download CCD File 
A
D-GLUCOSE IN LINEAR FORM
C6 H12 O6
GZCGUPFRVQAUEE-SLPGGIOYSA-N
 Ligand Interaction
GLC
Query on GLC

Download SDF File 
Download CCD File 
A
ALPHA-D-GLUCOSE
C6 H12 O6
WQZGKKKJIJFFOK-DVKNGEFBSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.3 Å
  • R-Value Free: 0.210 
  • R-Value Work: 0.166 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 61.460α = 90.00
b = 84.820β = 90.00
c = 121.750γ = 90.00
Software Package:
Software NamePurpose
X-PLORmodel building
CNSrefinement
SCALAdata scaling
CCP4data scaling
X-PLORphasing
DENZOdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2000-08-02
    Type: Initial release
  • Version 1.1: 2008-04-27
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance