Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 39.30 kDa 
• Atom Count: 3073 
• Modelled Residue Count: 338 
• Deposited Residue Count: 342 
• Unique protein chains: 1

1JX6

CRYSTAL STRUCTURE OF LUXP FROM VIBRIO HARVEYI COMPLEXED WITH AUTOINDUCER-2

• DOI: 10.2210/pdb1JX6/pdb

• Classification: SIGNALING PROTEIN
• Organism(s): Vibrio harveyi
• Expression System: Escherichia coli BL21
• Mutation(s): No 


• Deposited: 2001-09-05 Released: 2002-02-04 
• Deposition Author(s): Chen, X., Schauder, S., Potier, N., Van Dorsselaer, A., Pelczer, I., BassleR, B.L., Hughson, F.M.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.50 Å
• R-Value Free: 0.239 
• R-Value Work: 0.214 
• R-Value Observed: 0.214 

Literature

Structural identification of a bacterial quorum-sensing signal containing boron.

Chen, X., Schauder, S., Potier, N., Van Dorsselaer, A., Pelczer, I., Bassler, B.L., Hughson, F.M.

(2002) Nature 415: 545-549

• PubMed: 11823863 
• DOI: 10.1038/415545a
• Primary Citation of Related Structures:  
  1JX6


• PubMed Abstract: 
  

Cell-cell communication in bacteria is accomplished through the exchange of extracellular signalling molecules called autoinducers. This process, termed quorum sensing, allows bacterial populations to coordinate gene expression. Community cooperation probably enhances the effectiveness of processes such as bioluminescence, virulence factor expression, antibiotic production and biofilm development. Unlike other autoinducers, which are specific to a particular species of bacteria, a recently discovered autoinducer (AI-2) is produced by a large number of bacterial species. AI-2 has been proposed to serve as a 'universal' signal for inter-species communication. The chemical identity of AI-2 has, however, proved elusive. Here we present the crystal structure of an AI-2 sensor protein, LuxP, in a complex with autoinducer. The bound ligand is a furanosyl borate diester that bears no resemblance to previously characterized autoinducers. Our findings suggest that addition of naturally occurring borate to an AI-2 precursor generates active AI-2. Furthermore, they indicate a potential biological role for boron, an element required by a number of organisms but for unknown reasons.

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Organizational Affiliation: 

Department of Molecular Biology, Princeton University, Princeton, New Jersey 08544-1014, USA.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
LUXP PROTEIN	A	342	Vibrio harveyi	Mutation(s): 0  Gene Names: luxP
UniProt
Find proteins for P54300 (Vibrio harveyi) Explore P54300  Go to UniProtKB:  P54300

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
AI2	C [auth A]	3A-METHYL-5,6-DIHYDRO-FURO[2,3-D][1,3,2]DIOXABOROLE-2,2,6,6A-TETRAOL C5 H10 B O7 ACKRRKSNOOISSG-VPENINKCSA-N
CA	B [auth A]	CALCIUM ION Ca BHPQYMZQTOCNFJ-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.50 Å
• R-Value Free: 0.239 
• R-Value Work: 0.214 
• R-Value Observed: 0.214 
• Space Group: P 1 2₁ 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 44.268	α = 90
b = 77.467	β = 96.37
c = 52.008	γ = 90

Software Package:

Software Name	Purpose
MLPHARE	phasing
CNS	refinement
MARMAD	data reduction
SCALEPACK	data scaling

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2001-09-05 
• Released Date: 2002-02-04 
Deposition Author(s): Chen, X., Schauder, S., Potier, N., Van Dorsselaer, A., Pelczer, I., BassleR, B.L., Hughson, F.M.

Revision History  

• Version 1.0: 2002-02-04
  Type: Initial release
  
• Version 1.1: 2008-04-27
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance