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 
  • R-Value Observed: 0.207 

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
  • Primary Citation of Related Structures:  
    1ZHH

  • 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 kinase L ...

    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
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(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Autoinducer 2-binding periplasmic protein luxP A344Vibrio harveyiMutation(s): 0 
Gene Names: luxP
Find proteins for P54300 (Vibrio harveyi)
Explore P54300 
Go to UniProtKB:  P54300
Protein Feature View
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  • Reference Sequence
Find similar proteins by: 
(by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Autoinducer 2 sensor kinase/phosphatase luxQ B242Vibrio harveyiMutation(s): 0 
Gene Names: luxQ
EC: 2.7.13.3 (UniProt), 3.1.3 (UniProt)
Find proteins for P54302 (Vibrio harveyi)
Explore P54302 
Go to UniProtKB:  P54302
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NHE
Query on NHE
Download Ideal Coordinates CCD File 
B
2-[N-CYCLOHEXYLAMINO]ETHANE SULFONIC ACID
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 
  • R-Value Observed: 0.207 
  • Space Group: P 65
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 128.468α = 90
b = 128.468β = 90
c = 95.671γ = 120
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
SOLVEphasing
REFMACrefinement

Structure Validation

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Entry History 

Deposition Data

Revision History 

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