Crystal structure of Vibrio harveyi LuxQ periplasmic domain

Experimental Data Snapshot

  • Resolution: 1.70 Å
  • R-Value Free: 0.237 
  • R-Value Work: 0.194 
  • R-Value Observed: 0.197 

wwPDB Validation   3D Report Full Report

This is version 1.3 of the entry. See complete history


Ligand-induced asymmetry in histidine sensor kinase complex regulates quorum sensing.

Neiditch, M.B.Federle, M.J.Pompeani, A.J.Kelly, R.C.Swem, D.L.Jeffrey, P.D.Bassler, B.L.Hughson, F.M.

(2006) Cell 126: 1095-1108

  • DOI: https://doi.org/10.1016/j.cell.2006.07.032
  • Primary Citation of Related Structures:  
    2HJ9, 2HJE

  • PubMed Abstract: 

    Bacteria sense their environment using receptors of the histidine sensor kinase family, but how kinase activity is regulated by ligand binding is not well understood. Autoinducer-2 (AI-2), a secreted signaling molecule originally identified in studies of the marine bacterium Vibrio harveyi, regulates quorum-sensing responses and allows communication between different bacterial species. AI-2 signal transduction in V. harveyi requires the integral membrane receptor LuxPQ, comprised of periplasmic binding protein (LuxP) and histidine sensor kinase (LuxQ) subunits. Combined X-ray crystallographic and functional studies show that AI-2 binding causes a major conformational change within LuxP, which in turn stabilizes a quaternary arrangement in which two LuxPQ monomers are asymmetrically associated. We propose that formation of this asymmetric quaternary structure is responsible for repressing the kinase activity of both LuxQ subunits and triggering the transition of V. harveyi into quorum-sensing mode.

  • Organizational Affiliation

    Department of Molecular Biology, Princeton University, Princeton, NJ 08544, USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Autoinducer 2 sensor kinase/phosphatase luxQ221Vibrio harveyiMutation(s): 0 
Gene Names: luxQ
Find proteins for P54302 (Vibrio harveyi)
Explore P54302 
Go to UniProtKB:  P54302
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP54302
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 1.70 Å
  • R-Value Free: 0.237 
  • R-Value Work: 0.194 
  • R-Value Observed: 0.197 
  • Space Group: P 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 33.446α = 82.18
b = 36.152β = 86.14
c = 49.185γ = 67.28
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

View Full Validation Report

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2006-09-26
    Type: Initial release
  • Version 1.1: 2008-05-01
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2024-02-14
    Changes: Data collection, Database references, Derived calculations