2AW6

Structure of a bacterial peptide pheromone/receptor complex and its mechanism of gene regulation


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3 Å
  • R-Value Free: 0.260 
  • R-Value Work: 0.212 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structure of peptide sex pheromone receptor PrgX and PrgX/pheromone complexes and regulation of conjugation in Enterococcus faecalis.

Shi, K.Brown, C.K.Gu, Z.Y.Kozlowicz, B.K.Dunny, G.M.Ohlendorf, D.H.Earhart, C.A.

(2005) Proc.Natl.Acad.Sci.Usa 102: 18596-18601

  • DOI: 10.1073/pnas.0506163102
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Many bacterial activities, including expression of virulence factors, horizontal genetic transfer, and production of antibiotics, are controlled by intercellular signaling using small molecules. To date, understanding of the molecular mechanisms of p ...

    Many bacterial activities, including expression of virulence factors, horizontal genetic transfer, and production of antibiotics, are controlled by intercellular signaling using small molecules. To date, understanding of the molecular mechanisms of peptide-mediated cell-cell signaling has been limited by a dearth of published information about the molecular structures of the signaling components. Here, we present the molecular structure of PrgX, a DNA- and peptide-binding protein that regulates expression of the conjugative transfer genes of the Enterococcus faecalis plasmid pCF10 in response to an intercellular peptide pheromone signal. Comparison of the structures of PrgX and the PrgX/pheromone complex suggests that pheromone binding destabilizes PrgX tetramers, opening a 70-bp pCF10 DNA loop required for conjugation repression.


    Organizational Affiliation

    Department of Biochemistry, Molecular Biology, and Biophysics, University of Minnesota, Minneapolis, MN 55455, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
PrgX
A, B
317Enterococcus faecalisMutation(s): 0 
Gene Names: prgX
Find proteins for Q04114 (Enterococcus faecalis)
Go to UniProtKB:  Q04114
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
peptide
E, F
7N/AMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3 Å
  • R-Value Free: 0.260 
  • R-Value Work: 0.212 
  • Space Group: P 61 2 2
Unit Cell:
Length (Å)Angle (°)
a = 82.546α = 90.00
b = 82.546β = 90.00
c = 380.156γ = 120.00
Software Package:
Software NamePurpose
d*TREKdata processing
REFMACrefinement
CNSrefinement
PDB_EXTRACTdata extraction
d*TREKdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2005-12-06
    Type: Initial release
  • Version 1.1: 2008-05-01
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance