1UOZ

Structure of the endoglucanase Cel6 from Mycobacterium tuberculosis in complex with thiocellopentaose at 1.1 angstrom


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.10 Å
  • R-Value Free: 0.130 
  • R-Value Work: 0.112 
  • R-Value Observed: 0.113 

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 CELLULASEA315Mycobacterium 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

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Entity ID: 2
MoleculeChainsChain Length2D DiagramGlycosylation3D Interactions
alpha-D-glucopyranose-(1-4)-1,4-dithio-beta-D-glucopyranose-(1-4)-1,4-dithio-beta-D-glucopyranoseB 3N/AN/A Oligosaccharides Interaction
Glycosylation Resources
GlyTouCan:  G10396JO
GlyCosmos:  G10396JO
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SGC
Query on SGC

Download Ideal Coordinates CCD File 
C [auth A]4-thio-beta-D-glucopyranose
C6 H12 O5 S
KGSURTOFVLAWDC-QZABAPFNSA-N
 Ligand Interaction
SO4
Query on SO4

Download Ideal Coordinates CCD File 
F [auth A]SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
GOL
Query on GOL

Download Ideal Coordinates CCD File 
D [auth A],
E [auth A]
GLYCEROL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.10 Å
  • R-Value Free: 0.130 
  • R-Value Work: 0.112 
  • R-Value Observed: 0.113 
  • Space Group: P 21 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 61.94α = 90
b = 92.627β = 90
c = 46.677γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
MOSFLMdata reduction
SCALAdata scaling
AMoREphasing

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