1OC7

D405N mutant of the CELLOBIOHYDROLASE CEL6A FROM HUMICOLA INSOLENS in complex with methyl-tetrathio-alpha-d-cellopentoside at 1.1 angstrom resolution


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.11 Å
  • R-Value Free: 0.124 
  • R-Value Work: 0.105 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structural Basis for Ligand Binding and Processivity in Cellobiohydrolase Cel6A from Humicola Insolens

Varrot, A.Frandsen, T.P.Von Ossowski, I.Boyer, V.Driguez, H.Schulein, M.Davies, G.J.

(2003) Structure 11: 855

  • Primary Citation of Related Structures:  1OC5, 1OC6, 1OCB, 1OCJ

  • PubMed Abstract: 
  • The enzymatic digestion of cellulose entails intimate involvement of cellobiohydrolases, whose characteristic active-center tunnel contributes to a processive degradation of the polysaccharide. The cellobiohydrolase Cel6A displays an active site with ...

    The enzymatic digestion of cellulose entails intimate involvement of cellobiohydrolases, whose characteristic active-center tunnel contributes to a processive degradation of the polysaccharide. The cellobiohydrolase Cel6A displays an active site within a tunnel formed by two extended loops, which are known to open and close in response to ligand binding. Here we present five structures of wild-type and mutant forms of Cel6A from Humicola insolens in complex with nonhydrolyzable thio-oligosaccharides, at resolutions from 1.7-1.1 A, dissecting the structural accommodation of a processing substrate chain through the active center during hydrolysis. Movement of ligand is facilitated by extensive solvent-mediated interactions and through flexibility in the hydrophobic surfaces provided by a sheath of tryptophan residues.


    Organizational Affiliation

    Department of Chemistry, University of York, Heslington, Y010 5YW, York, United Kingdom.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
CELLOBIOHYDROLASE II
A
364Humicola insolensGene Names: cel6A (avi2)
EC: 3.2.1.91
Find proteins for Q9C1S9 (Humicola insolens)
Go to UniProtKB:  Q9C1S9
Small Molecules
Ligands 8 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ACT
Query on ACT

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A
ACETATE ION
C2 H3 O2
QTBSBXVTEAMEQO-UHFFFAOYSA-M
 Ligand Interaction
GOL
Query on GOL

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A
GLYCEROL
GLYCERIN; PROPANE-1,2,3-TRIOL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
BGC
Query on BGC

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A
BETA-D-GLUCOSE
C6 H12 O6
WQZGKKKJIJFFOK-VFUOTHLCSA-N
 Ligand Interaction
MG
Query on MG

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A
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
DMF
Query on DMF

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A
DIMETHYLFORMAMIDE
C3 H7 N O
ZMXDDKWLCZADIW-UHFFFAOYSA-N
 Ligand Interaction
MA3
Query on MA3

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A
O1-METHYL-4-DEOXY-4-THIO-ALPHA-D-GLUCOSE
C7 H14 O5 S
PFROTWRHYMLGHR-GKHCUFPYSA-N
 Ligand Interaction
NAG
Query on NAG

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A
N-ACETYL-D-GLUCOSAMINE
C8 H15 N O6
OVRNDRQMDRJTHS-FMDGEEDCSA-N
 Ligand Interaction
SGC
Query on SGC

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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: 1.11 Å
  • R-Value Free: 0.124 
  • R-Value Work: 0.105 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 57.504α = 90.00
b = 60.148β = 90.00
c = 97.207γ = 90.00
Software Package:
Software NamePurpose
DENZOdata reduction
REFMACrefinement
SCALEPACKdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2003-07-10
    Type: Initial release
  • Version 1.1: 2011-05-08
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance