2Z2S

Crystal Structure of Rhodobacter sphaeroides SigE in complex with the anti-sigma ChrR


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.70 Å
  • R-Value Free: 0.286 
  • R-Value Work: 0.250 
  • R-Value Observed: 0.286 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

A conserved structural module regulates transcriptional responses to diverse stress signals in bacteria.

Campbell, E.A.Greenwell, R.Anthony, J.R.Wang, S.Lim, L.Das, K.Sofia, H.J.Donohue, T.J.Darst, S.A.

(2007) Mol Cell 27: 793-805

  • DOI: 10.1016/j.molcel.2007.07.009
  • Primary Citation of Related Structures:  
    2Q1Z, 2Z2S

  • PubMed Abstract: 
  • A transcriptional response to singlet oxygen in Rhodobacter sphaeroides is controlled by the group IV sigma factor sigma(E) and its cognate anti-sigma ChrR. Crystal structures of the sigma(E)/ChrR complex reveal a modular, two-domain architecture for ChrR ...

    A transcriptional response to singlet oxygen in Rhodobacter sphaeroides is controlled by the group IV sigma factor sigma(E) and its cognate anti-sigma ChrR. Crystal structures of the sigma(E)/ChrR complex reveal a modular, two-domain architecture for ChrR. The ChrR N-terminal anti-sigma domain (ASD) binds a Zn(2+) ion, contacts sigma(E), and is sufficient to inhibit sigma(E)-dependent transcription. The ChrR C-terminal domain adopts a cupin fold, can coordinate an additional Zn(2+), and is required for the transcriptional response to singlet oxygen. Structure-based sequence analyses predict that the ASD defines a common structural fold among predicted group IV anti-sigmas. These ASDs are fused to diverse C-terminal domains that are likely involved in responding to specific environmental signals that control the activity of their cognate sigma factor.


    Organizational Affiliation

    The Rockefeller University, 1230 York Avenue, New York, NY 10021, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
RpoE, ECF SigEA, C, E, G184Cereibacter sphaeroides 2.4.1Mutation(s): 0 
Gene Names: rpoERHOS4_27100RSP_1092
UniProt
Find proteins for Q3IYV6 (Cereibacter sphaeroides (strain ATCC 17023 / DSM 158 / JCM 6121 / CCUG 31486 / LMG 2827 / NBRC 12203 / NCIMB 8253 / ATH 2.4.1.))
Explore Q3IYV6 
Go to UniProtKB:  Q3IYV6
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ3IYV6
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Anti-Sigma factor ChrR, transcriptional activator ChrRB, D, F, H203Cereibacter sphaeroides 2.4.1Mutation(s): 0 
Gene Names: chrRRHOS4_27110RSP_1093
UniProt
Find proteins for P40685 (Cereibacter sphaeroides (strain ATCC 17023 / DSM 158 / JCM 6121 / CCUG 31486 / LMG 2827 / NBRC 12203 / NCIMB 8253 / ATH 2.4.1.))
Explore P40685 
Go to UniProtKB:  P40685
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP40685
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
MSE
Query on MSE
A, C, E, G L-PEPTIDE LINKINGC5 H11 N O2 SeMET
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.70 Å
  • R-Value Free: 0.286 
  • R-Value Work: 0.250 
  • R-Value Observed: 0.286 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 119.135α = 90
b = 46.452β = 91.63
c = 141.701γ = 90
Software Package:
Software NamePurpose
HKL-2000data collection
CNSrefinement
DENZOdata reduction
SCALEPACKdata scaling
CNSphasing

Structure Validation

View Full Validation Report




Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2008-02-05
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Source and taxonomy, Version format compliance