4XWM

Complex structure of catalytic domain of Clostridium Cellulovorans Exgs and Cellobiose


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.703 Å
  • R-Value Free: 0.163 
  • R-Value Work: 0.146 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

Structures of exoglucanase from Clostridium cellulovorans: cellotetraose binding and cleavage

Tsai, L.-C.Amiraslanov, I.Chen, H.R.Chen, Y.W.Lee, H.L.Liang, P.H.Liaw, Y.-C.

(2015) Acta Crystallogr.,Sect.F 71: 1264-1272

  • DOI: 10.1107/S2053230X15015915
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Exoglucanase/cellobiohydrolase (EC 3.2.1.176) hydrolyzes a β-1,4-glycosidic bond from the reducing end of cellulose and releases cellobiose as the major product. Three complex crystal structures of the glycosyl hydrolase 48 (GH48) cellobiohydrolase S ...

    Exoglucanase/cellobiohydrolase (EC 3.2.1.176) hydrolyzes a β-1,4-glycosidic bond from the reducing end of cellulose and releases cellobiose as the major product. Three complex crystal structures of the glycosyl hydrolase 48 (GH48) cellobiohydrolase S (ExgS) from Clostridium cellulovorans with cellobiose, cellotetraose and triethylene glycol molecules were solved. The product cellobiose occupies subsites +1 and +2 in the open active-site cleft of the enzyme-cellotetraose complex structure, indicating an enzymatic hydrolysis function. Moreover, three triethylene glycol molecules and one pentaethylene glycol molecule are located at active-site subsites -2 to -6 in the structure of the ExgS-triethylene glycol complex shown here. Modelling of glucose into subsite -1 in the active site of the ExgS-cellobiose structure revealed that Glu50 acts as a proton donor and Asp222 plays a nucleophilic role.


    Organizational Affiliation

    Molecular Science and Engineering, National Taipei University of Technology, 1, Section 3, Chung-Hsiao E. Road, Taipei 10608, Taiwan.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Exoglucanase S
A
681Clostridium cellulovoransMutation(s): 0 
Gene Names: exgS
EC: 3.2.1.91
Find proteins for O65986 (Clostridium cellulovorans)
Go to UniProtKB:  O65986
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CBI
Query on CBI

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Download CCD File 
A
CELLOBIOSE
C12 H22 O11
GUBGYTABKSRVRQ-QRZGKKJRSA-N
 Ligand Interaction
CBK
Query on CBK

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Download CCD File 
A
4-O-beta-D-glucopyranosyl-alpha-D-glucopyranose
C12 H22 O11
GUBGYTABKSRVRQ-MFRLZQSSSA-N
 Ligand Interaction
CA
Query on CA

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

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Download CCD File 
A
1,2-ETHANEDIOL
ETHYLENE GLYCOL
C2 H6 O2
LYCAIKOWRPUZTN-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.703 Å
  • R-Value Free: 0.163 
  • R-Value Work: 0.146 
  • Space Group: P 41 21 2
Unit Cell:
Length (Å)Angle (°)
a = 109.140α = 90.00
b = 109.140β = 90.00
c = 182.145γ = 90.00
Software Package:
Software NamePurpose
PHASERphasing
SCALEPACKdata scaling
PHENIXrefinement
PDB_EXTRACTdata extraction
RESOLVEphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2015-01-29 
  • Released Date: 2015-10-28 
  • Deposition Author(s): Liaw, Y.-C.
  • This entry supersedes: 4KKF

Revision History 

  • Version 1.0: 2015-10-28
    Type: Initial release