2MAP

Solution structure of the complex formed by the region 2 of E. coli sigmaE and its cognate -10 promoter element non template strand TGTCAAA.


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 30 
  • Conformers Submitted: 18 
  • Selection Criteria: structures with the lowest energy 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structural basis for -10 promoter element melting by environmentally induced sigma factors.

Campagne, S.Marsh, M.E.Capitani, G.Vorholt, J.A.Allain, F.H.

(2014) Nat.Struct.Mol.Biol. 21: 269-276

  • DOI: 10.1038/nsmb.2777
  • Primary Citation of Related Structures:  2MAO, 4LUP

  • PubMed Abstract: 
  • Bacterial transcription is controlled by sigma factors, the RNA polymerase subunits that act as initiation factors. Although a single housekeeping sigma factor enables transcription from thousands of promoters, environmentally induced sigma factors r ...

    Bacterial transcription is controlled by sigma factors, the RNA polymerase subunits that act as initiation factors. Although a single housekeeping sigma factor enables transcription from thousands of promoters, environmentally induced sigma factors redirect gene expression toward small regulons to carry out focused responses. Using structural and functional analyses, we determined the molecular basis of -10 promoter element recognition by Escherichia coli σ(E), which revealed an unprecedented way to achieve promoter melting. Group IV sigma factors induced strand separation at the -10 element by flipping out a single nucleotide from the nontemplate-strand DNA base stack. Unambiguous selection of this critical base was driven by a dynamic protein loop, which can be substituted to modify specificity of promoter recognition. This mechanism of promoter melting explains the increased promoter-selection stringency of environmentally induced sigma factors.


    Organizational Affiliation

    1] Institute of Microbiology, Eidgenössische Technische Hochschule (ETH) Zurich, Zurich, Switzerland. [2] Institute of Molecular Biology and Biophysics, Eidgenössische Technische Hochschule (ETH) Zurich, Zurich, Switzerland.




Macromolecules

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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
RNA polymerase sigma factor
A
96N/AN/A
Protein Feature View is not available: No corresponding UniProt sequence found.
Entity ID: 2
MoleculeChainsLengthOrganism
DNAB7N/A
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 30 
  • Conformers Submitted: 18 
  • 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: 2014-02-19
    Type: Initial release
  • Version 1.1: 2014-02-26
    Type: Database references
  • Version 1.2: 2014-03-19
    Type: Database references