5DES

2009 H1N1 PA endonuclease domain


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.05 Å
  • R-Value Free: 0.233 
  • R-Value Work: 0.198 
  • R-Value Observed: 0.200 

Starting Model: experimental
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wwPDB Validation   3D Report Full Report


This is version 1.5 of the entry. See complete history


Literature

Identification and characterization of influenza variants resistant to a viral endonuclease inhibitor.

Song, M.S.Kumar, G.Shadrick, W.R.Zhou, W.Jeevan, T.Li, Z.Slavish, P.J.Fabrizio, T.P.Yoon, S.W.Webb, T.R.Webby, R.J.White, S.W.

(2016) Proc Natl Acad Sci U S A 113: 3669-3674

  • DOI: https://doi.org/10.1073/pnas.1519772113
  • Primary Citation of Related Structures:  
    5CCY, 5CGV, 5CL0, 5CZN, 5D2O, 5D42, 5D4G, 5D8U, 5D9J, 5DBS, 5DEB, 5DES

  • PubMed Abstract: 

    The influenza endonuclease is an essential subdomain of the viral RNA polymerase. It processes host pre-mRNAs to serve as primers for viral mRNA and is an attractive target for antiinfluenza drug discovery. Compound L-742,001 is a prototypical endonuclease inhibitor, and we found that repeated passaging of influenza virus in the presence of this drug did not lead to the development of resistant mutant strains. Reduced sensitivity to L-742,001 could only be induced by creating point mutations via a random mutagenesis strategy. These mutations mapped to the endonuclease active site where they can directly impact inhibitor binding. Engineered viruses containing the mutations showed resistance to L-742,001 both in vitro and in vivo, with only a modest reduction in fitness. Introduction of the mutations into a second virus also increased its resistance to the inhibitor. Using the isolated wild-type and mutant endonuclease domains, we used kinetics, inhibitor binding and crystallography to characterize how the two most significant mutations elicit resistance to L-742,001. These studies lay the foundation for the development of a new class of influenza therapeutics with reduced potential for the development of clinical endonuclease inhibitor-resistant influenza strains.


  • Organizational Affiliation

    Department of Infectious Diseases, St. Jude Children's Research Hospital, Memphis, TN 38105;


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Polymerase acidic protein187Influenza A virus (A/California/04/2009(H1N1))Mutation(s): 0 
Gene Names: PA
EC: 3.1
UniProt
Find proteins for C3W5S0 (Influenza A virus (strain swl A/California/04/2009 H1N1))
Explore C3W5S0 
Go to UniProtKB:  C3W5S0
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupC3W5S0
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.05 Å
  • R-Value Free: 0.233 
  • R-Value Work: 0.198 
  • R-Value Observed: 0.200 
  • Space Group: P 64 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 73.619α = 90
b = 73.619β = 90
c = 129.056γ = 120
Software Package:
Software NamePurpose
HKL-2000data scaling
REFMACrefinement
PDB_EXTRACTdata extraction
HKL-2000data reduction
PHASERphasing

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)United StatesR01AI098757
St. Jude Children's Research Hospital (ALSAC)United States--

Revision History  (Full details and data files)

  • Version 1.0: 2016-03-16
    Type: Initial release
  • Version 1.1: 2016-03-30
    Changes: Database references
  • Version 1.2: 2016-04-13
    Changes: Database references
  • Version 1.3: 2017-09-13
    Changes: Author supporting evidence, Database references, Derived calculations
  • Version 1.4: 2019-12-11
    Changes: Author supporting evidence
  • Version 1.5: 2023-09-27
    Changes: Data collection, Database references, Derived calculations, Refinement description