2YOK

Cellobiohydrolase I Cel7A from Trichoderma harzianum at 1.7 A resolution


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.67 Å
  • R-Value Free: 0.161 
  • R-Value Work: 0.129 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Joint X-Ray Crystallographic and Molecular Dynamics Study of Cellobiohydrolase I from Trichoderma Harzianum: Deciphering the Structural Features of Cellobiohydrolase Catalytic Activity.

Textor, L.C.Colussi, F.Silveira, R.L.Serpa, V.De Mello, B.L.Muniz, J.R.C.Squina, F.M.Pereira, N.J.Skaf, M.S.Polikarpov, I.

(2013) FEBS J. 280: 56

  • DOI: 10.1111/febs.12049

  • PubMed Abstract: 
  • Aiming to contribute toward the characterization of new, biotechnologically relevant cellulolytic enzymes, we report here the first crystal structure of the catalytic core domain of Cel7A (cellobiohydrolase I) from the filamentous fungus Trichoderma ...

    Aiming to contribute toward the characterization of new, biotechnologically relevant cellulolytic enzymes, we report here the first crystal structure of the catalytic core domain of Cel7A (cellobiohydrolase I) from the filamentous fungus Trichoderma harzianum IOC 3844. Our structural studies and molecular dynamics simulations show that the flexibility of Tyr260, in comparison with Tyr247 from the homologous Trichoderma reesei Cel7A, is enhanced as a result of the short side-chains of adjacent Val216 and Ala384 residues and creates an additional gap at the side face of the catalytic tunnel. T. harzianum cellobiohydrolase I also has a shortened loop at the entrance of the cellulose-binding tunnel, which has been described to interact with the substrate in T. reesei Cel7A. These structural features might explain why T. harzianum Cel7A displays higher k(cat) and K(m) values, and lower product inhibition on both glucoside and lactoside substrates, compared with T. reesei Cel7A.


    Organizational Affiliation

    Instituto de Física de São Carlos, Universidade de São Paulo, São Carlos, SP, Brazil.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
EXOGLUCANASE 1
A
426Trichoderma harzianumGene Names: cbh1
EC: 3.2.1.91
Find proteins for Q9P8P3 (Trichoderma harzianum)
Go to UniProtKB:  Q9P8P3
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
PE4
Query on PE4

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Download CCD File 
A
2-{2-[2-(2-{2-[2-(2-ETHOXY-ETHOXY)-ETHOXY]-ETHOXY}-ETHOXY)-ETHOXY]-ETHOXY}-ETHANOL
POLYETHYLENE GLYCOL PEG4000
C16 H34 O8
PJWQOENWHPEPKI-UHFFFAOYSA-N
 Ligand Interaction
PEG
Query on PEG

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Download CCD File 
A
DI(HYDROXYETHYL)ETHER
C4 H10 O3
MTHSVFCYNBDYFN-UHFFFAOYSA-N
 Ligand Interaction
NAG
Query on NAG

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Download CCD File 
A
N-ACETYL-D-GLUCOSAMINE
C8 H15 N O6
OVRNDRQMDRJTHS-FMDGEEDCSA-N
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
PCA
Query on PCA
A
L-PEPTIDE LINKINGC5 H7 N O3GLU
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.67 Å
  • R-Value Free: 0.161 
  • R-Value Work: 0.129 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 56.734α = 90.00
b = 69.187β = 90.00
c = 90.569γ = 90.00
Software Package:
Software NamePurpose
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-11-14
    Type: Initial release
  • Version 1.1: 2013-01-16
    Type: Database references