5EFC

Structure of Influenza B Lee PB2 cap-binding domain bound to GTP


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.227 
  • R-Value Work: 0.183 
  • R-Value Observed: 0.185 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Molecular Basis of mRNA Cap Recognition by Influenza B Polymerase PB2 Subunit.

Xie, L.Wartchow, C.Shia, S.Uehara, K.Steffek, M.Warne, R.Sutton, J.Muiru, G.T.Leonard, V.H.Bussiere, D.E.Ma, X.

(2016) J Biol Chem 291: 363-370

  • DOI: 10.1074/jbc.M115.693051
  • Primary Citation of Related Structures:  
    5EFA, 5EFC, 5EF9

  • PubMed Abstract: 
  • Influenza virus polymerase catalyzes the transcription of viral mRNAs by a process known as "cap-snatching," where the 5'-cap of cellular pre-mRNA is recognized by the PB2 subunit and cleaved 10-13 nucleotides downstream of the cap by the endonuclease PA subunit ...

    Influenza virus polymerase catalyzes the transcription of viral mRNAs by a process known as "cap-snatching," where the 5'-cap of cellular pre-mRNA is recognized by the PB2 subunit and cleaved 10-13 nucleotides downstream of the cap by the endonuclease PA subunit. Although this mechanism is common to both influenza A (FluA) and influenza B (FluB) viruses, FluB PB2 recognizes a wider range of cap structures including m(7)GpppGm-, m(7)GpppG-, and GpppG-RNA, whereas FluA PB2 utilizes methylated G-capped RNA specifically. Biophysical studies with isolated PB2 cap-binding domain (PB2(cap)) confirm that FluB PB2 has expanded mRNA cap recognition capability, although the affinities toward m(7)GTP are significantly reduced when compared with FluA PB2. The x-ray co-structures of the FluB PB2(cap) with bound cap analogs m(7)GTP and GTP reveal an inverted GTP binding mode that is distinct from the cognate m(7)GTP binding mode shared between FluA and FluB PB2. These results delineate the commonalities and differences in the cap-binding site between FluA and FluB PB2 and will aid structure-guided drug design efforts to identify dual inhibitors of both FluA and FluB PB2.


    Organizational Affiliation

    Structural and Biophysical Chemistry, Global Discovery Chemistry, xiaolei.ma@novartis.com.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Polymerase basic protein 2A174Influenza B virus (B/Lee/1940)Mutation(s): 0 
Gene Names: PB2
UniProt
Find proteins for Q9QLL6 (Influenza B virus (strain B/Lee/1940))
Explore Q9QLL6 
Go to UniProtKB:  Q9QLL6
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GTP
Query on GTP

Download Ideal Coordinates CCD File 
B [auth A]GUANOSINE-5'-TRIPHOSPHATE
C10 H16 N5 O14 P3
XKMLYUALXHKNFT-UUOKFMHZSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
GTPKd:  14100   nM  Binding MOAD
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.227 
  • R-Value Work: 0.183 
  • R-Value Observed: 0.185 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 40.515α = 90
b = 46.93β = 90
c = 87.952γ = 90
Software Package:
Software NamePurpose
Aimlessdata scaling
PHENIXrefinement
PDB_EXTRACTdata extraction
PHASERphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

  • Deposited Date: 2015-10-23 
  • Released Date: 2015-11-18 
  • Deposition Author(s): Ma, X., Shia, S.

Revision History  (Full details and data files)

  • Version 1.0: 2015-11-18
    Type: Initial release
  • Version 1.1: 2015-11-25
    Changes: Database references
  • Version 1.2: 2016-01-13
    Changes: Database references