3ZM8

Crystal structure of Podospora anserina GH26-CBM35 beta-(1,4)- mannanase

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.85 Å
  • R-Value Free: 0.257 
  • R-Value Work: 0.206 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history. 

Literature

Structural and Biochemical Analyses of Glycoside Hydrolase Families 5 and 26 Beta-(1,4)-Mannanases from Podospora Anserina Reveal Differences Upon Manno-Oligosaccharides Catalysis.

Couturier, M., Roussel, A., Rosengren, A., Leone, P., Stalbrand, H., Berrin, J.G.

(2013) J.Biol.Chem. 288: 14624

  • DOI: 10.1074/jbc.M113.459438
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    • The microbial deconstruction of the plant cell wall is a key biological process that is of increasing importance with the development of a sustainable biofuel industry. The glycoside hydrolase families GH5 (PaMan5A) and GH26 (PaMan26A) endo-β-1,4-man ...

    The microbial deconstruction of the plant cell wall is a key biological process that is of increasing importance with the development of a sustainable biofuel industry. The glycoside hydrolase families GH5 (PaMan5A) and GH26 (PaMan26A) endo-β-1,4-mannanases from the coprophilic ascomycete Podospora anserina contribute to the enzymatic degradation of lignocellulosic biomass. In this study, P. anserina mannanases were further subjected to detailed comparative analysis of their substrate specificities, active site organization, and transglycosylation capacity. Although PaMan5A displays a classical mode of action, PaMan26A revealed an atypical hydrolysis pattern with the release of mannotetraose and mannose from mannopentaose resulting from a predominant binding mode involving the -4 subsite. The crystal structures of PaMan5A and PaMan26A were solved at 1.4 and 2.85 Å resolution, respectively. Analysis of the PaMan26A structure supported strong interaction with substrate at the -4 subsite mediated by two aromatic residues Trp-244 and Trp-245. The PaMan26A structure appended to its family 35 carbohydrate binding module revealed a short and proline-rich rigid linker that anchored together the catalytic and the binding modules.

    Organizational Affiliation: 

    INRA, UMR1163 BCF, Aix Marseille Université, Polytech Marseille, F-13288 Marseille, France.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
GH26 ENDO-BETA-1,4-MANNANASE
A
475Podospora anserinaMutation(s): 0 
EC: 3.2.1.78
Find proteins for E2GHW2 (Podospora anserina)
Go to UniProtKB:  E2GHW2
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CA
Query on CA
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Download CCD File 
A
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
TLA
Query on TLA
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Download CCD File 
A
L(+)-TARTARIC ACID
C4 H6 O6
FEWJPZIEWOKRBE-JCYAYHJZSA-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
HG
Query on HG
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Download CCD File 
A
MERCURY (II) ION
Hg
BQPIGGFYSBELGY-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.85 Å
  • R-Value Free: 0.257 
  • R-Value Work: 0.206 
  • Space Group: P 65 2 2
Unit Cell:
Length (Å)Angle (°)
a = 97.490α = 90.00
b = 97.490β = 90.00
c = 268.717γ = 120.00
Software Package:
Software NamePurpose
BUSTERrefinement
SCALAdata scaling
AMoREphasing
XDSdata reduction

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2013-04-17
    Type: Initial release
  • Version 1.1: 2013-06-12
    Type: Database references