6MVM

LasR LBD L130F:3OC14HSL complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.265 
  • R-Value Work: 0.213 
  • R-Value Observed: 0.223 

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Ligand Structure Quality Assessment 


This is version 1.2 of the entry. See complete history


Literature

An Autoinducer Analogue Reveals an Alternative Mode of Ligand Binding for the LasR Quorum-Sensing Receptor.

Paczkowski, J.E.McCready, A.R.Cong, J.P.Li, Z.Jeffrey, P.D.Smith, C.D.Henke, B.R.Hughson, F.M.Bassler, B.L.

(2019) ACS Chem Biol 14: 378-389

  • DOI: 10.1021/acschembio.8b00971
  • Primary Citation of Related Structures:  
    6MVM, 6MWH, 6MWL, 6MWW, 6MWZ

  • PubMed Abstract: 
  • Bacteria use a cell-cell communication process called quorum sensing to coordinate collective behaviors. Quorum sensing relies on production and group-wide detection of extracellular signal molecules called autoinducers. Here, we probe the activity of the Pseudomonas aeruginosa LasR quorum-sensing receptor using synthetic agonists based on the structure of the native homoserine lactone autoinducer ...

    Bacteria use a cell-cell communication process called quorum sensing to coordinate collective behaviors. Quorum sensing relies on production and group-wide detection of extracellular signal molecules called autoinducers. Here, we probe the activity of the Pseudomonas aeruginosa LasR quorum-sensing receptor using synthetic agonists based on the structure of the native homoserine lactone autoinducer. The synthetic compounds range from low to high potency, and agonist activity tracks with the ability of the agonist to stabilize the LasR protein. Structural analyses of the LasR ligand binding domain complexed with representative synthetic agonists reveal two modes of ligand binding, one mimicking the canonical autoinducer binding arrangement, and the other with the lactone head group rotated approximately 150°. Iterative mutagenesis combined with chemical synthesis reveals the amino acid residues and the chemical moieties, respectively, that are key to enabling each mode of binding. Simultaneous alteration of LasR residues Thr75, Tyr93, and Ala127 converts low-potency compounds into high-potency compounds and converts ligands that are nearly inactive into low-potency compounds. These results show that the LasR binding pocket displays significant flexibility in accommodating different ligands. The ability of LasR to bind ligands in different conformations, and in so doing, alter their potency as agonists, could explain the difficulties that have been encountered in the development of competitive LasR inhibitors.


    Related Citations: 
    • Structural determinants driving homoserine lactone ligand selection in thePseudomonas aeruginosaLasR quorum-sensing receptor.
      McCready, A.R., Paczkowski, J.E., Henke, B.R., Bassler, B.L.
      (2019) Proc Natl Acad Sci U S A 116: 245

    Organizational Affiliation

    Howard Hughes Medical Institute , Chevy Chase , Maryland 20815 , United States.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Transcriptional regulator LasRA, B162Pseudomonas aeruginosa UCBPP-PA14Mutation(s): 1 
Gene Names: lasRPA14_45960
UniProt
Find proteins for A0A0H2Z901 (Pseudomonas aeruginosa (strain UCBPP-PA14))
Explore A0A0H2Z901 
Go to UniProtKB:  A0A0H2Z901
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
K4G (Subject of Investigation/LOI)
Query on K4G

Download Ideal Coordinates CCD File 
C [auth A], D [auth B]3-oxo-N-[(3S)-2-oxooxolan-3-yl]tetradecanamide
C18 H31 N O4
YQFJJDSGBAAUPW-INIZCTEOSA-N
 Ligand Interaction
Binding Affinity Annotations 
IDSourceBinding Affinity
K4G BindingDB:  6MVM EC50: min: 10, max: 15 (nM) from 2 assay(s)
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.265 
  • R-Value Work: 0.213 
  • R-Value Observed: 0.223 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 44.881α = 90
b = 70.774β = 90.15
c = 53.817γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
HKL-3000data reduction
HKL-3000data scaling
PHENIXphasing

Structure Validation

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Ligand Structure Quality Assessment  



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United States5R37GM065859
National Science Foundation (NSF, United States)United StatesMCB-1713731
Howard Hughes Medical Institute (HHMI)United States--

Revision History  (Full details and data files)

  • Version 1.0: 2019-01-16
    Type: Initial release
  • Version 1.1: 2019-10-09
    Changes: Data collection, Database references
  • Version 1.2: 2019-11-20
    Changes: Author supporting evidence