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TitleProtective human antibodies against a conserved epitope in pre- and postfusion influenza hemagglutinin.
Journal, issue, pagesProc Natl Acad Sci U S A, Vol. 121, Issue 1, Page e2316964120, Year 2024
Publish dateJan 2, 2024
AuthorsJoel Finney / Annie Park Moseman / Susan Kong / Akiko Watanabe / Shengli Song / Richard M Walsh / Masayuki Kuraoka / Ryutaro Kotaki / E Ashley Moseman / Kevin R McCarthy / Dongmei Liao / Xiaoe Liang / Xiaoyan Nie / Olivia Lavidor / Richard Abbott / Stephen C Harrison / Garnett Kelsoe /
PubMed AbstractPhylogenetically and antigenically distinct influenza A and B viruses (IAV and IBV) circulate in human populations, causing widespread morbidity. Antibodies (Abs) that bind epitopes conserved in both ...Phylogenetically and antigenically distinct influenza A and B viruses (IAV and IBV) circulate in human populations, causing widespread morbidity. Antibodies (Abs) that bind epitopes conserved in both IAV and IBV hemagglutinins (HAs) could protect against disease by diverse virus subtypes. Only one reported HA Ab, isolated from a combinatorial display library, protects against both IAV and IBV. Thus, there has been so far no information on the likelihood of finding naturally occurring human Abs that bind HAs of diverse IAV subtypes and IBV lineages. We have now recovered from several unrelated human donors five clonal Abs that bind a conserved epitope preferentially exposed in the postfusion conformation of IAV and IVB HA2. These Abs lack neutralizing activity in vitro but in mice provide strong, IgG subtype-dependent protection against lethal IAV and IBV infections. Strategies to elicit similar Abs routinely might contribute to more effective influenza vaccines.
External linksProc Natl Acad Sci U S A / PubMed:38147556 / PubMed Central
MethodsEM (single particle)
Resolution4.98 Å
Structure data

42149

8udg

EMDB-42149, PDB-8udg:
S1V2-72 Fab bound to EHA2 from influenza B/Malaysia/2506/2004
Method: EM (single particle) / Resolution: 4.98 Å

Source
  • influenza b virus (b/malaysia/2506/2004)
  • homo sapiens (human)
KeywordsVIRAL PROTEIN/IMMUNE SYSTEM / immunoglobulin / complex / hemagglutinin / VIRAL PROTEIN / VIRAL PROTEIN-IMMUNE SYSTEM complex

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