1ZHH

Crystal Structure of the Apo Form of Vibrio Harveyi LUXP Complexed with the Periplasmic Domain of LUXQ


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.94 Å
  • R-Value Free: 0.222 
  • R-Value Work: 0.206 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Regulation of LuxPQ Receptor Activity by the Quorum-Sensing Signal Autoinducer-2.

Neiditch, M.B.Federle, M.J.Miller, S.T.Bassler, B.L.Hughson, F.M.

(2005) Mol.Cell 18: 507-518

  • DOI: 10.1016/j.molcel.2005.04.020

  • PubMed Abstract: 
  • The extracellular signaling molecule autoinducer-2 (AI-2) mediates quorum-sensing communication in diverse bacterial species. In marine vibrios, binding of AI-2 to the periplasmic receptor LuxP modulates the activity of the inner membrane sensor kina ...

    The extracellular signaling molecule autoinducer-2 (AI-2) mediates quorum-sensing communication in diverse bacterial species. In marine vibrios, binding of AI-2 to the periplasmic receptor LuxP modulates the activity of the inner membrane sensor kinase LuxQ, transducing the AI-2 information into the cytoplasm. Here, we show that Vibrio harveyi LuxP associates with LuxQ in both the presence and absence of AI-2. The 1.9 A X-ray crystal structure of apoLuxP, complexed with the periplasmic domain of LuxQ, reveals that the latter contains two tandem Per/ARNT/Simple-minded (PAS) folds. Thus, although many prokaryotic PAS folds themselves bind ligands, the LuxQ periplasmic PAS folds instead bind LuxP, monitoring its AI-2 occupancy. Mutations that disrupt the apoLuxP:LuxQ interface sensitize V. harveyi to AI-2, implying that AI-2 binding causes the replacement of one set of LuxP:LuxQ contacts with another. These conformational changes switch LuxQ between two opposing enzymatic activities, each of which conveys information to the cytoplasm about the cell density of the surrounding environment.


    Organizational Affiliation

    Department of Molecular Biology, Princeton University, Princeton, New Jersey 08544, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Autoinducer 2-binding periplasmic protein luxP
A
344Vibrio harveyiMutation(s): 0 
Gene Names: luxP
Find proteins for P54300 (Vibrio harveyi)
Go to UniProtKB:  P54300
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Autoinducer 2 sensor kinase/phosphatase luxQ
B
242Vibrio harveyiMutation(s): 0 
Gene Names: luxQ
EC: 2.7.13.3, 3.1.3.-
Find proteins for P54302 (Vibrio harveyi)
Go to UniProtKB:  P54302
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NHE
Query on NHE

Download SDF File 
Download CCD File 
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: 1.94 Å
  • R-Value Free: 0.222 
  • R-Value Work: 0.206 
  • Space Group: P 65
Unit Cell:
Length (Å)Angle (°)
a = 128.468α = 90.00
b = 128.468β = 90.00
c = 95.671γ = 120.00
Software Package:
Software NamePurpose
REFMACrefinement
SOLVEphasing
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2005-05-24
    Type: Initial release
  • Version 1.1: 2008-04-30
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Advisory, Version format compliance