4Q11

Crystal structure of Proteus mirabilis transcriptional regulator protein Crl at 1.95A resolution


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.95 Å
  • R-Value Free: 0.238 
  • R-Value Work: 0.185 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structural and functional features of Crl proteins and identification of conserved surface residues required for interaction with the RpoS/ sigma S subunit of RNA polymerase.

Cavaliere, P.Levi-Acobas, F.Mayer, C.Saul, F.A.England, P.Weber, P.Raynal, B.Monteil, V.Bellalou, J.Haouz, A.Norel, F.

(2014) Biochem.J. 463: 215-224

  • DOI: 10.1042/BJ20140578

  • PubMed Abstract: 
  • In many γ-proteobacteria, the RpoS/σS sigma factor associates with the core RNAP (RNA polymerase) to modify global gene transcription in stationary phase and under stress conditions. The small regulatory protein Crl stimulates the association of σS w ...

    In many γ-proteobacteria, the RpoS/σS sigma factor associates with the core RNAP (RNA polymerase) to modify global gene transcription in stationary phase and under stress conditions. The small regulatory protein Crl stimulates the association of σS with the core RNAP in Escherichia coli and Salmonella enterica serovar Typhimurium, through direct and specific interaction with σS. The structural determinants of Crl involved in σS binding are unknown. In the present paper we report the X-ray crystal structure of the Proteus mirabilis Crl protein (CrlPM) and a structural model for Salmonella Typhimurium Crl (CrlSTM). Using a combination of in vivo and in vitro assays, we demonstrated that CrlSTM and CrlPM are structurally similar and perform the same biological function. In the Crl structure, a cavity enclosed by flexible arms contains two patches of conserved and exposed residues required for σS binding. Among these, charged residues that are likely to be involved in electrostatic interactions driving Crl-σS complex formation were identified. CrlSTM and CrlPM interact with domain 2 of σS with the same binding properties as with full-length σS. These results suggest that Crl family members share a common mechanism of σS binding in which the flexible arms of Crl might play a dynamic role.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Sigma factor-binding protein Crl
A, B
133Proteus mirabilis (strain HI4320)Mutation(s): 0 
Gene Names: crl
Find proteins for B4EUU9 (Proteus mirabilis (strain HI4320))
Go to UniProtKB:  B4EUU9
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NHE
Query on NHE

Download SDF File 
Download CCD File 
A, B
2-[N-CYCLOHEXYLAMINO]ETHANE SULFONIC ACID
N-CYCLOHEXYLTAURINE; CHES
C8 H17 N O3 S
MKWKNSIESPFAQN-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.95 Å
  • R-Value Free: 0.238 
  • R-Value Work: 0.185 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 57.585α = 90.00
b = 36.195β = 115.18
c = 60.880γ = 90.00
Software Package:
Software NamePurpose
Aimlessdata scaling
XDSdata reduction
PHASERphasing
MxCuBEdata collection
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2014-08-06
    Type: Initial release
  • Version 1.1: 2014-10-08
    Type: Database references