2BGO

Mannan Binding Module from Man5C


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 80 
  • Conformers Submitted: 
  • Selection Criteria: RANDOM 5 STRUCTURES FROM 20 LOWEST ENERGY 

wwPDB Validation   3D Report Full Report


This is version 1.5 of the entry. See complete history


Literature

Structure of a Mannan-Specific Family 35 Carbohydrate-Binding Module: Evidence for Significant Conformational Changes Upon Ligand Binding

Tunnicliffe, R.B.Bolam, D.N.Pell, G.Gilbert, H.J.Williamson, M.P.

(2005) J Mol Biol 347: 287

  • DOI: https://doi.org/10.1016/j.jmb.2005.01.038
  • Primary Citation of Related Structures:  
    2BGO, 2BGP

  • PubMed Abstract: 

    Enzymes that digest plant cell wall polysaccharides generally contain non-catalytic, carbohydrate-binding modules (CBMs) that function by attaching the enzyme to the substrate, potentiating catalytic activity. Here, we present the first structure of a family 35 CBM, derived from the Cellvibrio japonicus beta-1,4-mannanase Man5C. The NMR structure has been determined for both the free protein and the protein bound to mannopentaose. The data show that the protein displays a typical beta-jelly-roll fold. Ligand binding is not located on the concave surface of the protein, as occurs in many CBMs that display the jelly-roll fold, but is formed by the loops that link the two beta-sheets of the protein, similar to family 6 CBMs. In contrast to the majority of CBMs, which are generally rigid proteins, CBM35 undergoes significant conformational change upon ligand binding. The curvature of the binding site and the narrow binding cleft are likely to be the main determinants of binding specificity. The predicted solvent exposure of O6 at several subsites provides an explanation for the observed accommodation of decorated mannans. Two of the key aromatic residues in Man5C-CBM35 that interact with mannopentaose are conserved in mannanase-derived CBM35s, which will guide specificity predictions based on the primary sequence of proteins in this CBM family.


  • Organizational Affiliation

    Department of Molecular Biology and Biotechnology, University of Sheffield, Western Bank, Sheffield S10 2TN, UK.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
ENDO-B1,4-MANNANASE 5C140Cellvibrio japonicusMutation(s): 0 
UniProt
Find proteins for Q840C0 (Cellvibrio japonicus)
Explore Q840C0 
Go to UniProtKB:  Q840C0
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ840C0
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 80 
  • Conformers Submitted: 
  • Selection Criteria: RANDOM 5 STRUCTURES FROM 20 LOWEST ENERGY 

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2005-03-09
    Type: Initial release
  • Version 1.1: 2011-05-08
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2020-01-15
    Changes: Data collection, Other
  • Version 1.4: 2023-06-14
    Changes: Database references, Other
  • Version 1.5: 2024-06-19
    Changes: Data collection, Database references