1GUI

CBM4 structure and function

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.197 
  • R-Value Work: 0.172 
  • R-Value Observed: 0.173 

wwPDB Validation   3D Report Full Report


This is version 2.0 of the entry. See complete history. 


Literature

Differential Oligosaccharide Recognition by Evolutionarily-Related Beta-1,4 and Beta-1,3 Glucan-Binding Modules

Boraston, A.B., Nurizzo, D., Notenboom, V., Ducros, V., Rose, D.R., Kilburn, D.G., Davies, G.J.

(2002) J Mol Biol 319: 1143

  • DOI: 10.1016/S0022-2836(02)00374-1
  • Primary Citation of Related Structures:  
    1GU3, 1GUI

  • PubMed Abstract: 

    • Enzymes active on complex carbohydrate polymers frequently have modular structures in which a catalytic domain is appended to one or more carbohydrate-binding modules (CBMs). Although CBMs have been classified into a number of families based upon sequence, many closely related CBMs are specific for different polysaccharides ...

    Enzymes active on complex carbohydrate polymers frequently have modular structures in which a catalytic domain is appended to one or more carbohydrate-binding modules (CBMs). Although CBMs have been classified into a number of families based upon sequence, many closely related CBMs are specific for different polysaccharides. In order to provide a structural rationale for the recognition of different polysaccharides by CBMs displaying a conserved fold, we have studied the thermodynamics of binding and three-dimensional structures of the related family 4 CBMs from Cellulomonas fimi Cel9B and Thermotoga maritima Lam16A in complex with their ligands, beta-1,4 and beta-1,3 linked gluco-oligosaccharides, respectively. These two CBMs use a structurally conserved constellation of aromatic and polar amino acid side-chains that interact with sugars in two of the five binding subsites. Differences in the length and conformation of loops in non-conserved regions create binding-site topographies that complement the known solution conformations of their respective ligands. Thermodynamics interpreted in the light of structural information highlights the differential role of water in the interaction of these CBMs with their respective oligosaccharide ligands.

    Organizational Affiliation: 

    Protein Engineering Network of Centres of Excellence, Edmonton, Alberta, Canada T6G 2S2.



Macromolecules
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(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
LAMINARINASE 16A A155Thermotoga maritimaMutation(s): 0 
Find proteins for Q9WXN1 (Thermotoga maritima (strain ATCC 43589 / MSB8 / DSM 3109 / JCM 10099))
Explore Q9WXN1 
Go to UniProtKB:  Q9WXN1
Protein Feature View
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  • Reference Sequence
Oligosaccharides

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Entity ID: 2
MoleculeChainsChain Length2D Diagram Glycosylation3D Interactions
beta-D-glucopyranose-(1-3)-beta-D-glucopyranose-(1-3)-beta-D-glucopyranose-(1-3)-beta-D-glucopyranose-(1-3)-beta-D-glucopyranose-(1-3)-beta-D-glucopyranose
B
6 N/A Oligosaccharides Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.197 
  • R-Value Work: 0.172 
  • R-Value Observed: 0.173 
  • Space Group: P 32 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 105.117α = 90
b = 105.117β = 90
c = 49.636γ = 120
Software Package:
Software NamePurpose
REFMACrefinement
DENZOdata reduction
SCALEPACKdata scaling
BEASTphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2002-09-26
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Advisory, Version format compliance
  • Version 2.0: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Advisory, Atomic model, Data collection, Derived calculations, Other, Structure summary