3JPU

LasR-TP4 complex

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.281 
  • R-Value Work: 0.225 
  • R-Value Observed: 0.227 

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Ligand Structure Quality Assessment 


This is version 1.1 of the entry. See complete history. 


Literature

Molecular basis for the recognition of structurally distinct autoinducer mimics by the Pseudomonas aeruginosa LasR quorum-sensing signaling receptor.

Zou, Y., Nair, S.K.

(2009) Chem Biol 16: 961-970

  • DOI: 10.1016/j.chembiol.2009.09.001
  • Primary Citation of Related Structures:  
    3IX4, 3IX8, 3JPU

  • PubMed Abstract: 

    • The human pathogen Pseudomonas aeruginosa coordinates the expression of virulence factors using quorum sensing, a signaling cascade triggered by the activation of signal receptors by small-molecule autoinducers. These homoserine lactone autoinducers stabilize their cognate receptors and activate their functions as transcription factors ...

    The human pathogen Pseudomonas aeruginosa coordinates the expression of virulence factors using quorum sensing, a signaling cascade triggered by the activation of signal receptors by small-molecule autoinducers. These homoserine lactone autoinducers stabilize their cognate receptors and activate their functions as transcription factors. Because quorum sensing regulates the progression of infection and host immune resistance, significant efforts have been devoted toward the identification of small molecules that disrupt this process. Screening efforts have identified a class of triphenyl compounds that are structurally distinct from the homoserine lactone autoinducer, yet interact specifically and potently with LasR receptor to modulate quorum sensing (Muh et al., 2006a). Here we present the high-resolution crystal structures of the ligand binding domain of LasR in complex with the autoinducer N-3-oxo-dodecanoyl homoserine lactone (1.4 A resolution), and with the triphenyl mimics TP-1, TP-3, and TP-4 (to between 1.8 A and 2.3 A resolution). These crystal structures provide a molecular rationale for understanding how chemically distinct compounds can be accommodated by a highly selective receptor, and provide the framework for the development of novel quorum-sensing regulators, utilizing the triphenyl scaffold.

    Organizational Affiliation: 

    Department of Biochemistry, University of Illinois at Urbana-Champaign, 600 S. Mathews Avenue, Urbana, IL 61801, USA.



Macromolecules
Find similar proteins by: 
(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Transcriptional activator protein lasRA, B, C, D, E173Pseudomonas aeruginosaMutation(s): 0 
Gene Names: lasR, PA1430
UniProt
Find proteins for P25084 (Pseudomonas aeruginosa (strain ATCC 15692 / DSM 22644 / CIP 104116 / JCM 14847 / LMG 12228 / 1C / PRS 101 / PAO1))
Explore P25084 
Go to UniProtKB:  P25084
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
TY4 (Subject of Investigation/LOI)
Query on TY4
Download Ideal Coordinates CCD File 
F [auth A], G [auth B], H [auth C], I [auth D], J [auth E]4-bromo-2-({[(2-chlorophenyl)carbonyl]amino}methyl)-6-methylphenyl 2,4-dichlorobenzoate
C22 H15 Br Cl3 N O3
ZKSVHHXAFVAAHC-UHFFFAOYSA-N		 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.281 
  • R-Value Work: 0.225 
  • R-Value Observed: 0.227 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 153.148α = 90
b = 82.428β = 126.01
c = 90.493γ = 90
Software Package:
Software NamePurpose
MAR345dtbdata collection
PHASERphasing
REFMACrefinement
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

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Ligand Structure Quality Assessment  


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Entry History 

Deposition Data

  • Deposited Date: 2009-09-04 
  • Released Date: 2009-10-13 
    • Deposition Author(s): Zou, Y., Nair, S.K.

Revision History  (Full details and data files)

  • Version 1.0: 2009-10-13
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Advisory, Refinement description, Version format compliance