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Title: Vaccine-elicited antibody that neutralizes H5N1 influenza and variants binds the receptor site and polymorphic sites

Journal Article · · Proceedings of the National Academy of Sciences of the United States of America
 [1];  [2];  [2];  [2];  [3];  [4]
  1. Vanderbilt Univ. School of Medicine, Nashville, TN (United States). Dept. of Pathology, Microbiology and Immunology
  2. Vanderbilt Univ. School of Medicine, Nashville, TN (United States). Vanderbilt Vaccine Center
  3. Vanderbilt Univ. School of Medicine, Nashville, TN (United States). Dept. of Pathology, Microbiology and Immunology. Vanderbilt Vaccine Center
  4. Vanderbilt Univ. School of Medicine, Nashville, TN (United States). Dept. of Pathology, Microbiology and Immunology. Dept. of Pharmacology. Center for Structural Biology

Antigenic drift of circulating seasonal influenza viruses necessitates an international vaccine effort to reduce the impact on human health. A critical feature of the seasonal vaccine is that it stimulates an already primed immune system to diversify memory B cells to recognize closely related, but antigenically distinct, influenza glycoproteins (hemagglutinins). Influenza pandemics arise when hemagglutinins to which no preexisting adaptive immunity exists acquire the capacity to infect humans. Hemagglutinin 5 is one subtype to which little preexisting immunity exists and is only a few acquired mutations away from the ability to transmit efficiently between ferrets, and possibly humans. In this paper, we describe the structure and molecular mechanism of neutralization by H5.3, a vaccine-elicited antibody that neutralizes hemagglutinin 5 viruses and variants with expanded host range. H5.3 binds in the receptor-binding site, forming contacts that recapitulate many of the sialic acid interactions, as well as multiple peripheral interactions, yet is not sensitive to mutations that alter sialic acid binding. H5.3 is highly specific for a subset of H5 strains, and this specificity arises from interactions to the periphery of the receptor-binding site. Finally, H5.3 is also extremely potent, despite retaining germ line-like conformational flexibility.

Research Organization:
Vanderbilt Univ. School of Medicine, Nashville, TN (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); National Inst. of Health (NIH) (United States); Defense Threat Reduction Agency (DTRA) (United States); Michigan Economic Development Corporation (United States); Michigan Technology Tri-Corridor (United States)
Grant/Contract Number:
AC02-06CH11357; R01 AI106002; R21 AI092268; HHSN272200900047C; HDTRA1-10-1-0067; 085P1000817; T32 GM008320; RR026915
OSTI ID:
1214868
Journal Information:
Proceedings of the National Academy of Sciences of the United States of America, Vol. 112, Issue 30; ISSN 0027-8424
Publisher:
National Academy of Sciences, Washington, DC (United States)Copyright Statement
Country of Publication:
United States
Language:
ENGLISH
Citation Metrics:
Cited by: 22 works
Citation information provided by
Web of Science

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Subclade 2.2.1-Specific Human Monoclonal Antibodies That Recognize an Epitope in Antigenic Site A of Influenza A(H5) Virus HA Detected between 2015 and 2018 journal April 2019
Influenza Virus–Specific Human Antibody Repertoire Studies journal January 2019
Conformational Plasticity in Broadly Neutralizing HIV-1 Antibodies Triggers Polyreactivity journal May 2018
Identification of Antibodies Targeting the H3N2 Hemagglutinin Receptor Binding Site following Vaccination of Humans journal December 2019
Complementary recognition of the receptor-binding site of highly pathogenic H5N1 influenza viruses by two human neutralizing antibodies journal October 2018
Recombinant Influenza Vaccines: Saviors to Overcome Immunodominance journal January 2020
Isolation and Characterization of Human Monoclonal Antibodies That Recognize the Influenza A(H1N1)pdm09 Virus Hemagglutinin Receptor-Binding Site and Rarely Yield Escape Mutant Viruses journal November 2018
Broadening the H5N3 Vaccine Immunogenicity against H5N1 Virus by Modification of Neutralizing Epitopes journal December 2017