Serveur d'exploration H2N2

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Structure, Receptor Binding, and Antigenicity of Influenza Virus Hemagglutinins from the 1957 H2N2 Pandemic

Identifieur interne : 000050 ( PascalFrancis/Curation ); précédent : 000049; suivant : 000051

Structure, Receptor Binding, and Antigenicity of Influenza Virus Hemagglutinins from the 1957 H2N2 Pandemic

Auteurs : RUI XU [États-Unis] ; Ryan Mcbride [États-Unis] ; James C. Paulson [États-Unis] ; Christopher F. Basler [États-Unis] ; Ian A. Wilson [États-Unis]

Source :

RBID : Pascal:10-0093482

Descripteurs français

English descriptors

Abstract

The hemagglutinin (HA) envelope protein of influenza viruses mediates essential viral functions, including receptor binding and membrane fusion, and is the major viral antigen for antibody neutralization. The 1957 H2N2 subtype (Asian flu) was one of the three great influenza pandemics of the last century and caused 1 million deaths globally from 1957 to 1968. Three crystal structures of 1957 H2 HAs have been determined at 1.60 to 1.75 Å resolutions to investigate the structural basis for their antigenicity and evolution from avian to human binding specificity that contributed to its introduction into the human population. These structures, which represent the highest resolutions yet recorded for a complete ectodomain of a glycosylated viral surface antigen, along with the results of glycan microarray binding analysis, suggest that a hydrophobicity switch at residue 226 and elongation of receptor-binding sites were both critical for avian H2 HA to acquire human receptor specificity. H2 influenza viruses continue to circulate in birds and pigs and, therefore, remain a substantial threat for transmission to humans. The H2 HA structure also reveals a highly conserved epitope that could be harnessed in the design of a broader and more universal influenza A virus vaccine.
pA  
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A03   1    @0 J. virol.
A05       @2 84
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A08 01  1  ENG  @1 Structure, Receptor Binding, and Antigenicity of Influenza Virus Hemagglutinins from the 1957 H2N2 Pandemic
A11 01  1    @1 RUI XU
A11 02  1    @1 MCBRIDE (Ryan)
A11 03  1    @1 PAULSON (James C.)
A11 04  1    @1 BASLER (Christopher F.)
A11 05  1    @1 WILSON (Ian A.)
A14 01      @1 Department of Molecular Biology, The Scripps Research Institute, 10550 North Torrey Pines Road @2 La Jolla, California 92037 @3 USA @Z 1 aut. @Z 3 aut. @Z 5 aut.
A14 02      @1 Department of Chemical Physiology, The Scripps Research Institute, 10550 North Torrey Pines Road @2 La Jolla, California 92037 @3 USA @Z 2 aut. @Z 3 aut.
A14 03      @1 Skaggs Institute for Chemical Biology, The Scripps Research Institute, 10550 North Torrey Pines Road @2 La Jolla, California 92037 @3 USA @Z 5 aut.
A14 04      @1 Department of Microbiology, Mount Sinai School of Medicine @2 New York, New York 10029 @3 USA @Z 4 aut.
A20       @1 1715-1721
A21       @1 2010
A23 01      @0 ENG
A43 01      @1 INIST @2 13592 @5 354000180869760060
A44       @0 0000 @1 © 2010 INIST-CNRS. All rights reserved.
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C01 01    ENG  @0 The hemagglutinin (HA) envelope protein of influenza viruses mediates essential viral functions, including receptor binding and membrane fusion, and is the major viral antigen for antibody neutralization. The 1957 H2N2 subtype (Asian flu) was one of the three great influenza pandemics of the last century and caused 1 million deaths globally from 1957 to 1968. Three crystal structures of 1957 H2 HAs have been determined at 1.60 to 1.75 Å resolutions to investigate the structural basis for their antigenicity and evolution from avian to human binding specificity that contributed to its introduction into the human population. These structures, which represent the highest resolutions yet recorded for a complete ectodomain of a glycosylated viral surface antigen, along with the results of glycan microarray binding analysis, suggest that a hydrophobicity switch at residue 226 and elongation of receptor-binding sites were both critical for avian H2 HA to acquire human receptor specificity. H2 influenza viruses continue to circulate in birds and pigs and, therefore, remain a substantial threat for transmission to humans. The H2 HA structure also reveals a highly conserved epitope that could be harnessed in the design of a broader and more universal influenza A virus vaccine.
C02 01  X    @0 002A05C10
C03 01  X  FRE  @0 Influenzavirus @2 NW @5 01
C03 01  X  ENG  @0 Influenzavirus @2 NW @5 01
C03 01  X  SPA  @0 Influenzavirus @2 NW @5 01
C03 02  X  FRE  @0 Récepteur biologique @5 05
C03 02  X  ENG  @0 Biological receptor @5 05
C03 02  X  SPA  @0 Receptor biológico @5 05
C03 03  X  FRE  @0 Antigénicité @5 06
C03 03  X  ENG  @0 Antigenicity @5 06
C03 03  X  SPA  @0 Antigenicidad @5 06
C03 04  X  FRE  @0 Hémagglutinine @5 07
C03 04  X  ENG  @0 Hemagglutinin @5 07
C03 04  X  SPA  @0 Hemoaglutinina @5 07
C07 01  X  FRE  @0 Orthomyxoviridae @2 NW
C07 01  X  ENG  @0 Orthomyxoviridae @2 NW
C07 01  X  SPA  @0 Orthomyxoviridae @2 NW
C07 02  X  FRE  @0 Virus @2 NW
C07 02  X  ENG  @0 Virus @2 NW
C07 02  X  SPA  @0 Virus @2 NW
N21       @1 060
N44 01      @1 OTO
N82       @1 OTO

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<div type="abstract" xml:lang="en">The hemagglutinin (HA) envelope protein of influenza viruses mediates essential viral functions, including receptor binding and membrane fusion, and is the major viral antigen for antibody neutralization. The 1957 H2N2 subtype (Asian flu) was one of the three great influenza pandemics of the last century and caused 1 million deaths globally from 1957 to 1968. Three crystal structures of 1957 H2 HAs have been determined at 1.60 to 1.75 Å resolutions to investigate the structural basis for their antigenicity and evolution from avian to human binding specificity that contributed to its introduction into the human population. These structures, which represent the highest resolutions yet recorded for a complete ectodomain of a glycosylated viral surface antigen, along with the results of glycan microarray binding analysis, suggest that a hydrophobicity switch at residue 226 and elongation of receptor-binding sites were both critical for avian H2 HA to acquire human receptor specificity. H2 influenza viruses continue to circulate in birds and pigs and, therefore, remain a substantial threat for transmission to humans. The H2 HA structure also reveals a highly conserved epitope that could be harnessed in the design of a broader and more universal influenza A virus vaccine.</div>
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