1UP3

Structure of the endoglucanase Cel6 from Mycobacterium tuberculosis in complex with METHYL-CELLOBIOSYL-4-DEOXY-4-THIO-BETA-D-CELLOBIOSIDE at 1.6 angstrom


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.60 Å
  • R-Value Free: 0.174 
  • R-Value Work: 0.138 
  • R-Value Observed: 0.140 

wwPDB Validation   3D Report Full Report


This is version 2.0 of the entry. See complete history


Literature

Mycobacterium Tuberculosis Strains Possess Functional Cellulases.

Varrot, A.Leydier, S.Pell, G.Macdonald, J.M.Stick, R.V.Henrissat, B.Gilbert, H.J.Davies, G.J.

(2005) J Biol Chem 280: 20181

  • DOI: 10.1074/jbc.C500142200
  • Primary Citation of Related Structures:  
    1UOZ, 1UP0, 1UP2, 1UP3

  • PubMed Abstract: 
  • The genomes of various Mycobacterium tuberculosis strains encode proteins that do not appear to play a role in the growth or survival of the bacterium in its mammalian host, including some implicated in plant cell wall breakdown. Here we show that M. tuberculosis H37Rv does indeed possess a functional cellulase ...

    The genomes of various Mycobacterium tuberculosis strains encode proteins that do not appear to play a role in the growth or survival of the bacterium in its mammalian host, including some implicated in plant cell wall breakdown. Here we show that M. tuberculosis H37Rv does indeed possess a functional cellulase. The x-ray crystal structure of this enzyme, in ligand complex forms, from 1.9 to 1.1A resolution, reveals a highly conserved substrate-binding cleft, which affords similar, and unusual, distortion of the substrate at the catalytic center. The endoglucanase activity, together with the existence of a putative membrane-associated crystalline polysaccharide-binding protein, may reflect the ancestral soil origin of the Mycobacterium or hint at a previously unconsidered environmental niche.


    Organizational Affiliation

    York Structural Biology Laboratory, Department of Chemistry, University of York, York, Y010 5YW, United Kingdom.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
PUTATIVE CELLULASE CEL6A294Mycobacterium tuberculosis H37RvMutation(s): 0 
Gene Names: celA1Rv0062
EC: 3.2.1
UniProt
Find proteins for Q79G13 (Mycobacterium tuberculosis (strain ATCC 25618 / H37Rv))
Explore Q79G13 
Go to UniProtKB:  Q79G13
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ79G13
Protein Feature View
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  • Reference Sequence
Oligosaccharides

Help

Entity ID: 2
MoleculeChainsChain Length2D DiagramGlycosylation3D Interactions
beta-D-glucopyranose-(1-4)-beta-D-glucopyranose-(1-4)-4-thio-beta-D-glucopyranose-(1-4)-methyl beta-D-glucopyranosideB 4N/AN/A Oligosaccharides Interaction
Glycosylation Resources
GlyTouCan:  G15263TL
GlyCosmos:  G15263TL
Small Molecules
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.60 Å
  • R-Value Free: 0.174 
  • R-Value Work: 0.138 
  • R-Value Observed: 0.140 
  • Space Group: P 21 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 61.893α = 90
b = 93.058β = 90
c = 46.69γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2004-11-18
    Type: Initial release
  • Version 1.1: 2011-05-08
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: 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