Mycobacterium tuberculosis Chaperonin60.2

Experimental Data Snapshot

  • Resolution: 3.20 Å
  • R-Value Free: 0.285 
  • R-Value Work: 0.241 
  • R-Value Observed: 0.244 

Starting Model: experimental
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This is version 1.3 of the entry. See complete history


Crystal Structure of the 65-Kilodalton Heat Shock Protein, Chaperonin 60.2, of Mycobacterium tuberculosis

Qamra, R.Mande, S.C.

(2004) J Bacteriol 186: 8105-8113

  • DOI: https://doi.org/10.1128/JB.186.23.8105-8113.2004
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    Chaperonin 60s are a ubiquitous class of proteins that promote folding and assembly of other cellular polypeptides in an ATP-dependent manner. The oligomeric state of chaperonin 60s has been shown to be crucial to their role as molecular chaperones. Chaperonin 60s are also known to be important stimulators of the immune system. Mycobacterium tuberculosis possesses a duplicate set of chaperonin 60s, both of which have been shown to be potent cytokine stimulators. The M. tuberculosis chaperonin 60s are present in the extracellular milieu at concentrations that are extremely low for the formation of an oligomer. Here we present the crystal structure of one of the chaperonin 60s of M. tuberculosis, also called Hsp65 or chaperonin 60.2, at 3.2-A resolution. We were able to crystallize the protein in its dimeric state. The unusual dimerization of the protein leads to exposure of certain hydrophobic patches on the surface of the protein, and we hypothesize that this might have relevance in binding to immunogenic peptides, as it does in the eukaryotic homologs.

  • Organizational Affiliation

    Centre for DNA Fingerprinting and Diagnostics, Nacharam, Hyderabad 500076, India.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
60 kDa chaperonin 2
A, B
504Mycobacterium tuberculosisMutation(s): 0 
Gene Names: Rv0440
Find proteins for P9WPE7 (Mycobacterium tuberculosis (strain ATCC 25618 / H37Rv))
Explore P9WPE7 
Go to UniProtKB:  P9WPE7
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP9WPE7
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 3.20 Å
  • R-Value Free: 0.285 
  • R-Value Work: 0.241 
  • R-Value Observed: 0.244 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 58.674α = 90
b = 113.825β = 94.585
c = 79.535γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2004-12-07
    Type: Initial release
  • Version 1.1: 2008-04-29
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2023-10-25
    Changes: Data collection, Database references, Refinement description