4WE4

The crystal structure of hemagglutinin from 1968 H3N2 influenza virus

Summary for 4WE4

• Entry DOI: 10.2210/pdb4we4/pdb
• Related: 4WE5 4WE6 4WE7 4WE8 4WE9 4WEA
• Descriptor: Hemagglutinin HA1 chain, Hemagglutinin HA2 chain, 2-acetamido-2-deoxy-beta-D-glucopyranose-(1-2)-alpha-D-mannopyranose-(1-6)-[alpha-D-mannopyranose-(1-3)]beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose, ... (10 entities in total)
• Functional Keywords: hemagglutinin, h3, influenza virus, viral protein
• Biological source: Influenza A virus; More
• Total number of polymer chains: 2
• Total formula weight: 59871.26

Authors

Yang, H.,Carney, P.J.,Chang, J.C.,Guo, Z.,Villanueva, J.M.,Stevens, J. (deposition date: 2014-09-09, release date: 2015-02-11, Last modification date: 2024-11-06)

Primary citation

Yang, H.,Carney, P.J.,Chang, J.C.,Guo, Z.,Villanueva, J.M.,Stevens, J.
Structure and receptor binding preferences of recombinant human A(H3N2) virus hemagglutinins.
Virology, 477C:18-31, 2015

PubMed Abstract: A(H3N2) influenza viruses have circulated in humans since 1968, and antigenic drift of the hemagglutinin (HA) protein continues to be a driving force that allows the virus to escape the human immune response. Since the major antigenic sites of the HA overlap into the receptor binding site (RBS) of the molecule, the virus constantly struggles to effectively adapt to host immune responses, without compromising its functionality. Here, we have structurally assessed the evolution of the A(H3N2) virus HA RBS, using an established recombinant expression system. Glycan binding specificities of nineteen A(H3N2) influenza virus HAs, each a component of the seasonal influenza vaccine between 1968 and 2012, were analyzed. Results suggest that while its receptor-binding site has evolved from one that can bind a broad range of human receptor analogs to one with a more restricted binding profile for longer glycans, the virus continues to circulate and transmit efficiently among humans.

PubMed: 25617824
DOI: 10.1016/j.virol.2014.12.024

Experimental method

X-RAY DIFFRACTION (2.351 Å)