1Q9H

3-Dimensional structure of native Cel7A from Talaromyces emersonii


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.35 Å
  • R-Value Free: 0.229 
  • R-Value Work: 0.161 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Three-dimensional structure of a thermostable native cellobiohydrolase, CBH IB, and molecular characterization of the cel7 gene from the filamentous fungus, Talaromyces emersonii

Grassick, A.Murray, P.G.Thompson, R.Collins, C.M.Byrnes, L.Birrane, G.Higgins, T.M.Tuohy, M.G.

(2004) Eur.J.Biochem. 271: 4495-4506

  • DOI: 10.1111/j.1432-1033.2004.04409.x

  • PubMed Abstract: 
  • The X-ray structure of native cellobiohydrolase IB (CBH IB) from the filamentous fungus Talaromyces emersonii, PDB 1Q9H, was solved to 2.4 A by molecular replacement. 1Q9H is a glycoprotein that consists of a large, single domain with dimensions of a ...

    The X-ray structure of native cellobiohydrolase IB (CBH IB) from the filamentous fungus Talaromyces emersonii, PDB 1Q9H, was solved to 2.4 A by molecular replacement. 1Q9H is a glycoprotein that consists of a large, single domain with dimensions of approximately 60 A x 40 A x 50 A and an overall beta-sandwich structure, the characteristic fold of Family 7 glycosyl hydrolases (GH7). It is the first structure of a native glycoprotein and cellulase from this thermophilic eukaryote. The long cellulose-binding tunnel seen in GH7 Cel7A from Trichoderma reesei is conserved in 1Q9H, as are the catalytic residues. As a result of deletions and other changes in loop regions, the binding and catalytic properties of T. emersonii 1Q9H are different. The gene (cel7) encoding CBH IB was isolated from T. emersonii and expressed heterologously with an N-terminal polyHis-tag, in Escherichia coli. The deduced amino acid sequence of cel7 is homologous to fungal cellobiohydrolases in GH7. The recombinant cellobiohydrolase was virtually inactive against methylumberiferyl-cellobioside and chloronitrophenyl-lactoside, but partial activity could be restored after refolding of the urea-denatured enzyme. Profiles of cel7 expression in T. emersonii, investigated by Northern blot analysis, revealed that expression is regulated at the transcriptional level. Putative regulatory element consensus sequences for cellulase transcription factors have been identified in the upstream region of the cel7 genomic sequence.


    Related Citations: 
    • Crystallisation and preliminary crystallographic analysis of the catalytic domain Cellobiohydrolase IB from Talaromyces emersonii
      Grassick, A.,Birrane, G.,Tuohy, M.G.,Murray, P.G.,Higgins, T.M.
      (2003) Acta Crystallogr.,Sect.D 59: 1283


    Organizational Affiliation

    Molecular Glycobiotechnology Group, Department of Biochemistry, National University of Ireland, Galway, Ireland.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
cellobiohydrolase I catalytic domain
A
437Talaromyces emersoniiMutation(s): 0 
Gene Names: cbh1 (cbh1A)
EC: 3.2.1.-
Find proteins for Q8TFL9 (Talaromyces emersonii)
Go to UniProtKB:  Q8TFL9
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NAG
Query on NAG

Download SDF File 
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: 2.35 Å
  • R-Value Free: 0.229 
  • R-Value Work: 0.161 
  • Space Group: P 41 21 2
Unit Cell:
Length (Å)Angle (°)
a = 74.395α = 90.00
b = 74.395β = 90.00
c = 177.046γ = 90.00
Software Package:
Software NamePurpose
AMoREphasing
DENZOdata reduction
REFMACrefinement
SCALEPACKdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2004-11-09
    Type: Initial release
  • Version 1.1: 2008-04-29
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Non-polymer description, Version format compliance