Abstract:
:As influenza A viruses remain a major threat to human health worldwide, the discovery of broadly neutralizing monoclonal antibodies that recognize conserved epitopes would facilitate the development of antibody-based therapeutic strategies. Here we report that a VH4-4-encoded human mAb named 3E1 could neutralize H1 and H5 subtype viruses in vitro and protect mice against the H1N1 and H5N6 viruses by inhibiting the low pH-induced conformational rearrangement of haemagglutinin (HA), hence blocking membrane fusion. The crystal structures of 3E1 Fab in complex with HA of two H1N1 strains reveal that 3E1, with both heavy and light chains, binds to a conserved epitope of the HA stem region, comprising parts of the fusion peptide, the F subdomain and the outermost β-strand preceding helix A. Altogether, these data suggest the potential of 3E1 as a therapeutic drug against H1 and H5 subtype viruses.
journal_name
Nat Communjournal_title
Nature communicationsauthors
Wang W,Sun X,Li Y,Su J,Ling Z,Zhang T,Wang F,Zhang H,Chen H,Ding J,Sun Bdoi
10.1038/ncomms13577subject
Has Abstractpub_date
2016-12-02 00:00:00pages
13577issn
2041-1723pii
ncomms13577journal_volume
7pub_type
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