2MC6

A bacteriophage transcription regulator inhibits bacterial transcription initiation by sigma-factor displacement


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 20 
  • Conformers Submitted: 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

A bacteriophage transcription regulator inhibits bacterial transcription initiation by sigma-factor displacement.

Liu, B.Shadrin, A.Sheppard, C.Mekler, V.Xu, Y.Severinov, K.Matthews, S.Wigneshweraraj, S.

(2014) Nucleic Acids Res 42: 4294-4305

  • DOI: https://doi.org/10.1093/nar/gku080
  • Primary Citation of Related Structures:  
    2MC5, 2MC6

  • PubMed Abstract: 

    Bacteriophages (phages) appropriate essential processes of bacterial hosts to benefit their own development. The multisubunit bacterial RNA polymerase (RNAp) enzyme, which catalyses DNA transcription, is targeted by phage-encoded transcription regulators that selectively modulate its activity. Here, we describe the structural and mechanistic basis for the inhibition of bacterial RNAp by the transcription regulator P7 encoded by Xanthomonas oryzae phage Xp10. We reveal that P7 uses a two-step mechanism to simultaneously interact with the catalytic β and β' subunits of the bacterial RNAp and inhibits transcription initiation by inducing the displacement of the σ(70)-factor on initial engagement of RNAp with promoter DNA. The new mode of interaction with and inhibition mechanism of bacterial RNAp by P7 underscore the remarkable variety of mechanisms evolved by phages to interfere with host transcription.


  • Organizational Affiliation

    MRC Centre for Molecular Microbiology and Infection, Imperial College London, London SW7 2AZ, UK, Waksman Institute for Microbiology and Department of Molecular Biology and Biochemistry, Rutgers, The State University of New Jersey, Piscataway, NJ USA and St. Petersburg State Polytechnical University, St. Petersburg, Russia.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
RNA polymerase inhibitor p773Xipdecavirus Xp10Mutation(s): 0 
UniProt
Find proteins for Q8LTJ5 (Xipdecavirus Xp10)
Explore Q8LTJ5 
Go to UniProtKB:  Q8LTJ5
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ8LTJ5
Sequence Annotations
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  • Reference Sequence

Find similar proteins by:  Sequence   |   3D Structure  

Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
DNA-directed RNA polymerase subunit beta'10Xanthomonas oryzae pv. oryzae KACC 10331Mutation(s): 0 
EC: 2.7.7.6
UniProt
Find proteins for Q8KTH8 (Xanthomonas oryzae pv. oryzae (strain KACC10331 / KXO85))
Explore Q8KTH8 
Go to UniProtKB:  Q8KTH8
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ8KTH8
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 20 
  • Conformers Submitted: 

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2014-04-02
    Type: Initial release
  • Version 1.1: 2014-05-07
    Changes: Database references
  • Version 1.2: 2024-05-01
    Changes: Data collection, Database references