3LIS

Crystal Structure of the Restriction-Modification Controller Protein C.Csp231I (Monoclinic form)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.246 
  • R-Value Work: 0.207 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structural Analysis of a Novel Class of R-M Controller Proteins: C.Csp231I from Citrobacter sp. RFL231.

McGeehan, J.E.Streeter, S.D.Thresh, S.J.Taylor, J.E.Shevtsov, M.B.Kneale, G.G.

(2011) J.Mol.Biol. 409: 177-188

  • DOI: 10.1016/j.jmb.2011.03.033
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Controller proteins play a key role in the temporal regulation of gene expression in bacterial restriction-modification (R-M) systems and are important mediators of horizontal gene transfer. They form the basis of a highly cooperative, concentration- ...

    Controller proteins play a key role in the temporal regulation of gene expression in bacterial restriction-modification (R-M) systems and are important mediators of horizontal gene transfer. They form the basis of a highly cooperative, concentration-dependent genetic switch involved in both activation and repression of R-M genes. Here we present biophysical, biochemical, and high-resolution structural analysis of a novel class of controller proteins, exemplified by C.Csp231I. In contrast to all previously solved C-protein structures, each protein subunit has two extra helices at the C-terminus, which play a large part in maintaining the dimer interface. The DNA binding site of the protein is also novel, having largely AAAA tracts between the palindromic recognition half-sites, suggesting tight bending of the DNA. The protein structure shows an unusual positively charged surface that could form the basis for wrapping the DNA completely around the C-protein dimer.


    Organizational Affiliation

    Biophysics Laboratories, Institute of Biomedical and Biomolecular Sciences, School of Biological Sciences, University of Portsmouth, Portsmouth PO1 2DY, UK. john.mcgeehan@port.ac.uk




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Csp231I C protein
A, B
98Citrobacter sp. RFL231
Find proteins for Q32WH4 (Citrobacter sp. RFL231)
Go to UniProtKB:  Q32WH4
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.246 
  • R-Value Work: 0.207 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 49.010α = 90.00
b = 29.530β = 101.91
c = 64.380γ = 90.00
Software Package:
Software NamePurpose
SCALAdata scaling
PHASERphasing
MOSFLMdata reduction
PDB_EXTRACTdata extraction
REFMACrefinement
GDAdata collection

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2011-02-02
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance