2MZ8

Solution NMR structure of Salmonella Typhimurium transcriptional regulator protein Crl


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

Binding interface between the Salmonella sigma (S)/RpoS subunit of RNA polymerase and Crl: hints from bacterial species lacking crl.

Cavaliere, P.Sizun, C.Levi-Acobas, F.Nowakowski, M.Monteil, V.Bontems, F.Bellalou, J.Mayer, C.Norel, F.

(2015) Sci Rep 5: 13564-13564

  • DOI: 10.1038/srep13564

  • PubMed Abstract: 
  • In many Gram-negative bacteria, including Salmonella enterica serovar Typhimurium (S. Typhimurium), the sigma factor RpoS/σ(S) accumulates during stationary phase of growth, and associates with the core RNA polymerase enzyme (E) to promote transcript ...

    In many Gram-negative bacteria, including Salmonella enterica serovar Typhimurium (S. Typhimurium), the sigma factor RpoS/σ(S) accumulates during stationary phase of growth, and associates with the core RNA polymerase enzyme (E) to promote transcription initiation of genes involved in general stress resistance and starvation survival. Whereas σ factors are usually inactivated upon interaction with anti-σ proteins, σ(S) binding to the Crl protein increases σ(S) activity by favouring its association to E. Taking advantage of evolution of the σ(S) sequence in bacterial species that do not contain a crl gene, like Pseudomonas aeruginosa, we identified and assigned a critical arginine residue in σ(S) to the S. Typhimurium σ(S)-Crl binding interface. We solved the solution structure of S. Typhimurium Crl by NMR and used it for NMR binding assays with σ(S) and to generate in silico models of the σ(S)-Crl complex constrained by mutational analysis. The σ(S)-Crl models suggest that the identified arginine in σ(S) interacts with an aspartate of Crl that is required for σ(S) binding and is located inside a cavity enclosed by flexible loops, which also contribute to the interface. This study provides the basis for further structural investigation of the σ(S)-Crl complex.


    Organizational Affiliation

    Institut Pasteur, Laboratoire Systèmes Macromoléculaires et Signalisation, Département de Microbiologie, 25 rue du Docteur Roux, 75015 Paris, France.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Sigma factor-binding protein Crl
A
154Salmonella typhimurium (strain LT2 / SGSC1412 / ATCC 700720)Gene Names: crl
Find proteins for Q7CR52 (Salmonella typhimurium (strain LT2 / SGSC1412 / ATCC 700720))
Go to UniProtKB:  Q7CR52
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2015-12-23
    Type: Initial release