6U2S

Structure-based discovery of a novel small-molecule inhibitor of methicillin-resistant S. aureus


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.50 Å
  • R-Value Free: 0.188 
  • R-Value Work: 0.162 
  • R-Value Observed: 0.164 

Starting Model: experimental
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Ligand Structure Quality Assessment 


This is version 1.3 of the entry. See complete history


Literature

Structure-based discovery of a small-molecule inhibitor of methicillin-resistantStaphylococcus aureusvirulence.

Liu, J.Kozhaya, L.Torres, V.J.Unutmaz, D.Lu, M.

(2020) J Biol Chem 295: 5944-5959

  • DOI: https://doi.org/10.1074/jbc.RA120.012697
  • Primary Citation of Related Structures:  
    6U2S, 6U33, 6U3F, 6U3T, 6U3Y, 6U49, 6U4P

  • PubMed Abstract: 

    The rapid emergence and dissemination of methicillin-resistant Staphylococcus aureus (MRSA) strains poses a major threat to public health. MRSA possesses an arsenal of secreted host-damaging virulence factors that mediate pathogenicity and blunt immune defenses. Panton-Valentine leukocidin (PVL) and α-toxin are exotoxins that create lytic pores in the host cell membrane. They are recognized as being important for the development of invasive MRSA infections and are thus potential targets for antivirulence therapies. Here, we report the high-resolution X-ray crystal structures of both PVL and α-toxin in their soluble, monomeric, and oligomeric membrane-inserted pore states in complex with n -tetradecylphosphocholine (C 14 PC). The structures revealed two evolutionarily conserved phosphatidylcholine-binding mechanisms and their roles in modulating host cell attachment, oligomer assembly, and membrane perforation. Moreover, we demonstrate that the soluble C 14 PC compound protects primary human immune cells in vitro against cytolysis by PVL and α-toxin and hence may serve as the basis for the development of an antivirulence agent for managing MRSA infections.


  • Organizational Affiliation

    Public Health Research Institute, Department of Microbiology, Biochemistry, and Molecular Genetics, New Jersey Medical School, Rutgers University, Newark, New Jersey 07103.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Bi-component leukocidin LukED subunit D301Staphylococcus aureusMutation(s): 0 
Gene Names: lukNFlukDBTN44_02870EP54_14125EQ90_10595ER624_13605HMPREF3211_01500NCTC10654_01892NCTC13131_06007RK64_09800
Membrane Entity: Yes 
UniProt
Find proteins for Q2FXB1 (Staphylococcus aureus (strain NCTC 8325 / PS 47))
Explore Q2FXB1 
Go to UniProtKB:  Q2FXB1
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ2FXB1
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.50 Å
  • R-Value Free: 0.188 
  • R-Value Work: 0.162 
  • R-Value Observed: 0.164 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 149.202α = 90
b = 37.769β = 119.8
c = 77.914γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
PDB_EXTRACTdata extraction
HKL-2000data reduction
HKL-2000data scaling
PHASERphasing

Structure Validation

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Ligand Structure Quality Assessment 


Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Human Genome Research Institute (NIH/NHGRI)United States--

Revision History  (Full details and data files)

  • Version 1.0: 2020-03-25
    Type: Initial release
  • Version 1.1: 2020-04-01
    Changes: Database references
  • Version 1.2: 2020-05-13
    Changes: Database references
  • Version 1.3: 2023-10-11
    Changes: Data collection, Database references, Refinement description