4CXF

Structure of CnrH in complex with the cytosolic domain of CnrY


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.75 Å
  • R-Value Free: 0.201 
  • R-Value Work: 0.174 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

The Crystal Structure of the Anti-Sigma Factor Cnry in Complex with the Sigma Factor Cnrh Shows a New Structural Class of Anti- Sigma Factors Targeting Extracytoplasmic-Function Sigma Factors.

Maillard, A.P.Girard, E.Ziani, W.Petit-Hartlein, I.Kahn, R.Coves, J.

(2014) J.Mol.Biol. 426: 2313

  • DOI: 10.1016/j.jmb.2014.04.003

  • PubMed Abstract: 
  • Gene expression in bacteria is regulated at the level of transcription initiation, a process driven by σ factors. The regulation of σ factor activity proceeds from the regulation of their cytoplasmic availability, which relies on specific inhibitory ...

    Gene expression in bacteria is regulated at the level of transcription initiation, a process driven by σ factors. The regulation of σ factor activity proceeds from the regulation of their cytoplasmic availability, which relies on specific inhibitory proteins called anti-σ factors. With anti-σ factors regulating their availability according to diverse cues, extracytoplasmic function σ factors (σ(ECF)) form a major signal transduction system in bacteria. Here, structure:function relationships have been characterized in an emerging class of minimal-size transmembrane anti-σ factors, using CnrY from Cupriavidus metallidurans CH34 as a model. This study reports the 1.75-Å-resolution structure of CnrY cytosolic domain in complex with CnrH, its cognate σ(ECF), and identifies a small hydrophobic knob in CnrY as the major determinant of this interaction in vivo. Unsuspected structural similarity with the molecular switch regulating the general stress response in α-proteobacteria unravels a new class of anti-σ factors targeting σ(ECF). Members of this class carry out their function via a 30-residue stretch that displays helical propensity but no canonical structure on its own.


    Organizational Affiliation

    Université Grenoble Alpes, Commissariat à l'Energie Atomique et aux Energies Alternatives, Centre National de la Recherche Scientifique, and Institut de Biologie Structurale, F-38000 Grenoble, France. Electronic address: antoine.maillard@ibs.fr.,Université Grenoble Alpes, Commissariat à l'Energie Atomique et aux Energies Alternatives, Centre National de la Recherche Scientifique, and Institut de Biologie Structurale, F-38000 Grenoble, France.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
RNA POLYMERASE SIGMA FACTOR CNRH
A
191Cupriavidus metallidurans (strain ATCC 43123 / DSM 2839 / NBRC 102507 / CH34)Mutation(s): 0 
Gene Names: cnrH
Find proteins for P37978 (Cupriavidus metallidurans (strain ATCC 43123 / DSM 2839 / NBRC 102507 / CH34))
Go to UniProtKB:  P37978
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
CNRY
B
95Cupriavidus metallidurans (strain ATCC 43123 / DSM 2839 / NBRC 102507 / CH34)Mutation(s): 0 
Gene Names: cnrY (ORF0b)
Find proteins for P56621 (Cupriavidus metallidurans (strain ATCC 43123 / DSM 2839 / NBRC 102507 / CH34))
Go to UniProtKB:  P56621
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
A, B
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
CL
Query on CL

Download SDF File 
Download CCD File 
A
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.75 Å
  • R-Value Free: 0.201 
  • R-Value Work: 0.174 
  • Space Group: I 2 2 2
Unit Cell:
Length (Å)Angle (°)
a = 61.010α = 90.00
b = 79.122β = 90.00
c = 80.537γ = 90.00
Software Package:
Software NamePurpose
SCALAdata scaling
SHARPphasing
PHENIXrefinement
XDSdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2014-04-30
    Type: Initial release
  • Version 1.1: 2014-06-04
    Type: Database references