4IUJ

Structure of Polymerase acid protein (PA) from Influenzavirus A Influenza A virus A, WILSON-SMITH/1933 (H1N1)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Free: 0.201 
  • R-Value Work: 0.174 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structural analysis of H1N1 and H7N9 influenza A virus PA in the absence of PB1.

Moen, S.O.Abendroth, J.Fairman, J.W.Baydo, R.O.Bullen, J.Kirkwood, J.L.Barnes, S.R.Raymond, A.C.Begley, D.W.Henkel, G.McCormack, K.Tam, V.C.Phan, I.Staker, B.L.Stacy, R.Myler, P.J.Lorimer, D.Edwards, T.E.

(2014) Sci Rep 4: 5944-5944

  • DOI: 10.1038/srep05944
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Influenza A viruses cause the respiratory illness influenza, which can be mild to fatal depending on the strain and host immune response. The flu polymerase acidic (PA), polymerase basic 1 (PB1), and polymerase basic 2 (PB2) proteins comprise the RNA ...

    Influenza A viruses cause the respiratory illness influenza, which can be mild to fatal depending on the strain and host immune response. The flu polymerase acidic (PA), polymerase basic 1 (PB1), and polymerase basic 2 (PB2) proteins comprise the RNA-dependent RNA polymerase complex responsible for viral genome replication. The first crystal structures of the C-terminal domain of PA (PA-CTD) in the absence of PB1-derived peptides show a number of structural changes relative to the previously reported PB1-peptide bound structures. The human A/WSN/1933 (H1N1) and avian A/Anhui1/2013 (H7N9) strain PA-CTD proteins exhibit the same global topology as other strains in the absence of PB1, but differ extensively in the PB1 binding pocket including a widening of the binding groove and the unfolding of a β-turn. Both PA-CTD proteins exhibited a significant increase in thermal stability in the presence of either a PB1-derived peptide or a previously reported inhibitor in differential scanning fluorimetry assays. These structural changes demonstrate plasticity in the PA-PB1 binding interface which may be exploited in the development of novel therapeutics.


    Organizational Affiliation

    1] Seattle Structural Genomics Center for Infectious Disease (SSGCID) [2] Beryllium, 7869 NE Day Road West, Bainbridge Island, WA 98110, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Polymerase acidic protein
A
464Influenza A virus (strain A/Wilson-Smith/1933 H1N1)Mutation(s): 0 
Gene Names: PA
EC: 3.1.-.-
Find proteins for P15659 (Influenza A virus (strain A/Wilson-Smith/1933 H1N1))
Go to UniProtKB:  P15659
Experimental Data & Validation

Experimental Data

Unit Cell:
Length (Å)Angle (°)
a = 68.800α = 90.00
b = 68.800β = 90.00
c = 395.650γ = 120.00
Software Package:
Software NamePurpose
XSCALEdata scaling
REFMACrefinement
PHASERphasing
PDB_EXTRACTdata extraction
XDSdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2013-02-06
    Type: Initial release
  • Version 1.1: 2014-08-20
    Type: Database references
  • Version 1.2: 2017-11-15
    Type: Refinement description