Journal
MICROBIOLOGY AND IMMUNOLOGY
Volume 64, Issue 4, Pages 304-312Publisher
WILEY
DOI: 10.1111/1348-0421.12773
Keywords
avian influenza virus; hemagglutinin; interspecies transmission; sialic acid receptor; sulfated glycans
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Funding
- Japan Agency for Medical Research and Development [JP17fm0108008, JP17fm0208026]
- Foundation for the National Institutes of Health [AI114730]
- Netherlands Organization for Scientific Research
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Avian influenza viruses (AIVs) recognize sialic acid linked alpha 2,3 to galactose (SA alpha 2,3Gal) glycans as receptors. In this study, the interactions between hemagglutinins (HAs) of AIVs and sulfated SA alpha 2,3Gal glycans were analyzed to clarify the molecular basis of interspecies transmission of AIVs from ducks to chickens. It was revealed that E190V and N192D substitutions of the HA increased the recovery of viruses derived from an H6 duck virus isolate, A/duck/Hong Kong/960/1980 (H6N2), in chickens. Recombinant HAs from an H6 chicken virus, A/chicken/Tainan/V156/1999 (H6N1), bound to sulfated SA alpha 2,3Gal glycans, whereas the HAs from an H6 duck virus did not. Binding preference of mutant HAs revealed that an E190V substitution is critical for the recognition of sulfated SA alpha 2,3Gal glycans. These results suggest that the binding of the HA from H6 AIVs to sulfated SA alpha 2,3Gal glycans explains a part of mechanisms of interspecies transmission of AIVs from ducks to chickens.
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