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Shi, Yi; Zhang, Wei; Wang, Fei; Qi, Jianxun; Wu, Ying; Song, Hao; Gao, Feng; Bi, Yuhai; Zhang, Yanfang; Fan, Zheng; Qin, Chengfeng; Sun, Honglei; Liu, Jinhua; Haywood, Joel; Liu, Wenjun; Gong, Weimin; Wang, Dayan; Shu, Yuelong; Wang, Yu; Yan, Jinghua; Gao, George F.
Science (American Association for the Advancement of Science), 10/2013, Letnik: 342, Številka: 6155Journal Article
An avian-origin human-infecting influenza (H7N9) virus was recently identified in China. We have evaluated the viral hemagglutinin (HA) receptor-binding properties of two human H7N9 isolates, A/Shanghai/1/2013 (SH-H7N9) (containing the avian-signature residue Gln²²⁶) and A/Anhui/1/2013 (AH-H7N9) (containing the mammalian-signature residue Leu²²⁶). We found that SH-H7N9 HA preferentially binds the avian receptor analog, whereas AH-H7N9 HA binds both avian and human receptor analogs. Furthermore, an AH-H7N9 mutant HA (Leu²²⁶ → Gln) was found to exhibit dual receptor-binding property, indicating that other amino acid substitutions contribute to the receptor-binding switch. The structures of SH-H7N9 HA, AH-H7N9 HA, and its mutant in complex with either avian or human receptor analogs show how AH-H7N9 can bind human receptors while still retaining the avian receptor-binding property.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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Vir: Osebne bibliografije
in: SICRIS
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