3QWG

Crystal structure of EspRdelta10, C-terminal 10 amino acids deletion mutant of EspR transcription factor from Mycobacterium tuberculosis

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.99 Å
  • R-Value Free: 0.236 
  • R-Value Work: 0.183 
  • R-Value Observed: 0.185 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history. 


Literature

Atypical DNA recognition mechanism used by the EspR virulence regulator of Mycobacterium tuberculosis.

Blasco, B., Stenta, M., Alonso-Sarduy, L., Dietler, G., Peraro, M.D., Cole, S.T., Pojer, F.

(2011) Mol Microbiol 82: 251-264

  • DOI: 10.1111/j.1365-2958.2011.07813.x
  • Primary Citation of Related Structures:  
    3QF3, 3QWG, 3QYX

  • PubMed Abstract: 

    • The human pathogen Mycobacterium tuberculosis requires the ESX-1 secretion system for full virulence. EspR plays a key role in ESX-1 regulation via direct binding and transcriptional activation of the espACD operon. Here, we describe the crystal structures of EspR, a C-terminally truncated form, EspRΔ10, as well as an EspR-DNA complex ...

    The human pathogen Mycobacterium tuberculosis requires the ESX-1 secretion system for full virulence. EspR plays a key role in ESX-1 regulation via direct binding and transcriptional activation of the espACD operon. Here, we describe the crystal structures of EspR, a C-terminally truncated form, EspRΔ10, as well as an EspR-DNA complex. EspR forms a dimer with each monomer containing an N-terminal helix-turn-helix DNA binding motif and an atypical C-terminal dimerization domain. Structural studies combined with footprinting experiments, atomic force microscopy and molecular dynamic simulations allow us to propose a model in which a dimer of EspR dimers is the minimal functional unit with two subunits binding two consecutive major grooves. The other two DNA binding domains are thus free to form higher-order oligomers and to bridge distant DNA sites in a cooperative way. These features are reminiscent of nucleoid-associated proteins and suggest a more general regulatory role for EspR than was previously suspected.

    Organizational Affiliation: 

    Global Health Institute, Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland.



Macromolecules
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(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
ESX-1 secretion-associated regulator EspR A, B123Mycobacterium tuberculosisMutation(s): 0 
Gene Names: espR, MT3964, Rv3849
Find proteins for P9WJB7 (Mycobacterium tuberculosis (strain ATCC 25618 / H37Rv))
Explore P9WJB7 
Go to UniProtKB:  P9WJB7
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.99 Å
  • R-Value Free: 0.236 
  • R-Value Work: 0.183 
  • R-Value Observed: 0.185 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 46.46α = 90
b = 55.37β = 90
c = 76.55γ = 90
Software Package:
Software NamePurpose
XDSdata scaling
CCP4model building
PHENIXmodel building
PHENIXrefinement
XDSdata reduction
CCP4phasing
PHENIXphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2011-09-14
    Type: Initial release
  • Version 1.1: 2011-11-16
    Changes: Database references