2JDQ

C-terminal domain of influenza A virus polymerase PB2 subunit in complex with human importin alpha5


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.2 Å
  • R-Value Free: 0.247 
  • R-Value Work: 0.206 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structure and Nuclear Import Function of the C- Terminal Domain of Influenza Virus Polymerase Pb2 Subunit

Tarendeau, F.Boudet, J.Guilligay, D.Mas, P.Bougault, C.Boulo, S.Baudin, F.Ruigrok, R.W.H.Daigle, N.Ellenberg, J.Cusack, S.Simorre, J.-P.Hart, D.J.

(2007) Nat.Struct.Mol.Biol. 14: 229

  • DOI: 10.1038/nsmb1212
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The trimeric influenza virus polymerase, comprising subunits PA, PB1 and PB2, is responsible for transcription and replication of the segmented viral RNA genome. Using a novel library-based screening technique called expression of soluble proteins by ...

    The trimeric influenza virus polymerase, comprising subunits PA, PB1 and PB2, is responsible for transcription and replication of the segmented viral RNA genome. Using a novel library-based screening technique called expression of soluble proteins by random incremental truncation (ESPRIT), we identified an independently folded C-terminal domain from PB2 and determined its solution structure by NMR. Using green fluorescent protein fusions, we show that both the domain and the full-length PB2 subunit are efficiently imported into the nucleus dependent on a previously overlooked bipartite nuclear localization sequence (NLS). The crystal structure of the domain complexed with human importin alpha5 shows how the last 20 residues unfold to permit binding to the import factor. The domain contains three surface residues implicated in adaptation from avian to mammalian hosts. One of these tethers the NLS-containing peptide to the core of the domain in the unbound state.


    Organizational Affiliation

    European Molecular Biology Laboratory (EMBL) Grenoble Outstation, 6 rue Jules Horowitz, BP181, 38042 Grenoble Cedex 9, France.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
IMPORTIN ALPHA-1 SUBUNIT
A, B
450Homo sapiensMutation(s): 0 
Gene Names: KPNA1 (RCH2)
Find proteins for P52294 (Homo sapiens)
Go to Gene View: KPNA1
Go to UniProtKB:  P52294
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
POLYMERASE BASIC PROTEIN 2
D, E
83Influenza A virus (strain A/Victoria/3/1975 H3N2)Mutation(s): 0 
Gene Names: PB2
Find proteins for P31345 (Influenza A virus (strain A/Victoria/3/1975 H3N2))
Go to UniProtKB:  P31345
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.2 Å
  • R-Value Free: 0.247 
  • R-Value Work: 0.206 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 94.970α = 90.00
b = 100.550β = 90.00
c = 151.840γ = 90.00
Software Package:
Software NamePurpose
XDSdata reduction
REFMACrefinement
XSCALEdata scaling
PHASERphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2007-02-27
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Advisory, Version format compliance