4NKJ

Structure of influenza B virus hemagglutinin at membrane fusion pH


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.45 Å
  • R-Value Free: 0.268 
  • R-Value Work: 0.255 
  • R-Value Observed: 0.256 

wwPDB Validation   3D Report Full Report



Literature

Structural insights into the membrane fusion mechanism mediated by influenza virus hemagglutinin.

Ni, F.Chen, X.Shen, J.Wang, Q.

(2014) Biochemistry 53: 846-854

  • DOI: 10.1021/bi401525h
  • Primary Citation of Related Structures:  
    4NKJ

  • PubMed Abstract: 
  • Membrane fusion is involved in many fundamental cellular processes and entry of enveloped viruses into host cells. Influenza type A virus HA has long served as a paradigm for mechanistic studies of protein-mediated membrane fusion via large-scale str ...

    Membrane fusion is involved in many fundamental cellular processes and entry of enveloped viruses into host cells. Influenza type A virus HA has long served as a paradigm for mechanistic studies of protein-mediated membrane fusion via large-scale structural rearrangements induced by acidic pH. Here we report the newly determined crystal structure of influenza B virus HA2 in the postfusion state. Together with a large number of previously determined prefusion structures of influenza A and B virus HA and a postfusion structure of influenza A/H3N2 HA2, we identified conserved features that are shared between influenza A and B virus HA in the conformational transition and documented substantial differences that likely influence the detailed mechanisms of this process. Further studies are needed to dissect the effects of these and other structural differences in HA conformational changes and influenza pathogenicity and transmission, which may ultimately expedite the discovery of novel anti-influenza fusion inhibitors.


    Organizational Affiliation

    Verna and Marrs McLean Department of Biochemistry and Molecular Biology, Baylor College of Medicine , One Baylor Plaza, Houston, Texas 77030, United States.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Hemagglutinin HA2A157Influenza B virus (B/Texas/3394/2013)Mutation(s): 0 
Gene Names: HA
Find proteins for S5DRP1 (Influenza B virus)
Explore S5DRP1 
Go to UniProtKB:  S5DRP1
Protein Feature View
Expand
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.45 Å
  • R-Value Free: 0.268 
  • R-Value Work: 0.255 
  • R-Value Observed: 0.256 
  • Space Group: H 3 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 48.18α = 90
b = 48.18β = 90
c = 354.895γ = 120
Software Package:
Software NamePurpose
MAR345dtbdata collection
PHASESphasing
PHENIXrefinement
MOSFLMdata reduction
SCALAdata scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2014-04-02
    Type: Initial release