2ZNL

Crystal structure of PA-PB1 complex form influenza virus RNA polymerase


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.262 
  • R-Value Work: 0.207 
  • R-Value Observed: 0.210 

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This is version 1.1 of the entry. See complete history


Literature

The structural basis for an essential subunit interaction in influenza virus RNA polymerase

Obayashi, E.Yoshida, H.Kawai, F.Shibayama, N.Kawaguchi, A.Nagata, K.Tame, J.R.H.Park, S.-Y.

(2008) Nature 454: 1127-1131

  • DOI: 10.1038/nature07225
  • Primary Citation of Related Structures:  
    2ZNL

  • PubMed Abstract: 
  • Influenza A virus is a major human and animal pathogen with the potential to cause catastrophic loss of life. The virus reproduces rapidly, mutates frequently and occasionally crosses species barriers. The recent emergence in Asia of avian influenza related to highly pathogenic forms of the human virus has highlighted the urgent need for new effective treatments ...

    Influenza A virus is a major human and animal pathogen with the potential to cause catastrophic loss of life. The virus reproduces rapidly, mutates frequently and occasionally crosses species barriers. The recent emergence in Asia of avian influenza related to highly pathogenic forms of the human virus has highlighted the urgent need for new effective treatments. Here we demonstrate the importance to viral replication of a subunit interface in the viral RNA polymerase, thereby providing a new set of potential drug binding sites entirely independent of surface antigen type. No current medication targets this heterotrimeric polymerase complex. All three subunits, PB1, PB2 and PA, are required for both transcription and replication. PB1 carries the polymerase active site, PB2 includes the capped-RNA recognition domain, and PA is involved in assembly of the functional complex, but so far very little structural information has been reported for any of them. We describe the crystal structure of a large fragment of one subunit (PA) of influenza A RNA polymerase bound to a fragment of another subunit (PB1). The carboxy-terminal domain of PA forms a novel fold, and forms a deep, highly hydrophobic groove into which the amino-terminal residues of PB1 can fit by forming a 3(10) helix.


    Organizational Affiliation

    Protein Design Laboratory, Yokohama City University, 1-7-29 Suehiro, Tsurumi, Yokohama 230-0045, Japan.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Polymerase acidic proteinA478Influenza A virus (A/Puerto Rico/8/1934(H1N1))Mutation(s): 0 
Gene Names: PA
EC: 3.1
Find proteins for P03433 (Influenza A virus (strain A/Puerto Rico/8/1934 H1N1))
Explore P03433 
Go to UniProtKB:  P03433
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
RNA-directed RNA polymerase catalytic subunitB81Influenza A virus (A/Puerto Rico/8/1934(H1N1))Mutation(s): 0 
Gene Names: PB1
EC: 2.7.7.48
Find proteins for P03431 (Influenza A virus (strain A/Puerto Rico/8/1934 H1N1))
Explore P03431 
Go to UniProtKB:  P03431
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.262 
  • R-Value Work: 0.207 
  • R-Value Observed: 0.210 
  • Space Group: P 32 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 101.957α = 90
b = 101.957β = 90
c = 115.023γ = 120
Software Package:
Software NamePurpose
REFMACrefinement
ADSCdata collection
HKL-2000data reduction
SCALEPACKdata scaling
SHELXDphasing
SOLVEphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2008-09-02
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance