Journal
SCIENCE
Volume 317, Issue 5839, Pages 825-828Publisher
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.1135165
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- Intramural NIH HHS [Z99 AI999999] Funding Source: Medline
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Influenza virus entry is mediated by the receptor binding domain (RBD) of its spike, the hemagglutinin (HA). Adaptation of avian viruses to humans is associated with HA specificity for alpha 2,6- rather than alpha 2,3-linked sialic acid (SA) receptors. Here, we define mutations in influenza A subtype H5N1 (avian) HA that alter its specificity for SA either by decreasing alpha 2,3- or increasing alpha 2,6- SA recognition. RBD mutants were used to develop vaccines and monoclonal antibodies that neutralized new variants. Structure-based modification of HA specificity can guide the development of preemptive vaccines and therapeutic monoclonal antibodies that can be evaluated before the emergence of human-adapted H5N1 strains.
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