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: 1.6 Å
  • R-Value Free: 0.174 
  • R-Value Work: 0.138 

wwPDB Validation 3D Report Full Report


This is version 1.2 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:  

  • 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. ...

    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: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
PUTATIVE CELLULASE CEL6
A
294Mycobacterium tuberculosis (strain ATCC 25618 / H37Rv)Mutation(s): 0 
Gene Names: celA1
EC: 3.2.1.-
Find proteins for Q79G13 (Mycobacterium tuberculosis (strain ATCC 25618 / H37Rv))
Go to UniProtKB:  Q79G13
Small Molecules
Ligands 5 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
1PG
Query on 1PG

Download SDF File 
Download CCD File 
A
2-(2-{2-[2-(2-METHOXY-ETHOXY)-ETHOXY]-ETHOXY}-ETHOXY)-ETHANOL
C11 H24 O6
SLNYBUIEAMRFSZ-UHFFFAOYSA-N
 Ligand Interaction
SO4
Query on SO4

Download SDF File 
Download CCD File 
A
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
BGC
Query on BGC

Download SDF File 
Download CCD File 
A
BETA-D-GLUCOSE
C6 H12 O6
WQZGKKKJIJFFOK-VFUOTHLCSA-N
 Ligand Interaction
MGL
Query on MGL

Download SDF File 
Download CCD File 
A
O1-METHYL-GLUCOSE
C7 H14 O6
HOVAGTYPODGVJG-XUUWZHRGSA-N
 Ligand Interaction
SGC
Query on SGC

Download SDF File 
Download CCD File 
A
4-DEOXY-4-THIO-BETA-D-GLUCOPYRANOSE
C6 H12 O5 S
KGSURTOFVLAWDC-QZABAPFNSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.6 Å
  • R-Value Free: 0.174 
  • R-Value Work: 0.138 
  • Space Group: P 21 21 2
Unit Cell:
Length (Å)Angle (°)
a = 61.893α = 90.00
b = 93.058β = 90.00
c = 46.690γ = 90.00
Software Package:
Software NamePurpose
REFMACrefinement
SCALEPACKdata scaling
DENZOdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

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