Identification of determinants that mediate binding between Tembusu virus and the cellular receptor heat shock protein A9

文献类型： 外文期刊

第一作者： Zhao, Dongmin

作者： Zhao, Dongmin;Liu, Qingtao;Huang, Xinmei;Wang, Huili;Han, Kaikai;Yang, Jing;Bi, Keran;Liu, Yuzhuo;Zhang, Lijiao;Li, Yin

作者机构：

关键词： Tembusu virus; binding; envelope protein; heat shock protein A9

期刊名称：JOURNAL OF VETERINARY SCIENCE （ 影响因子：1.672； 五年影响因子：1.904 ）

ISSN： 1229-845X

年卷期： 2018 年 19 卷 4 期

页码：

收录情况： SCI

摘要： Heat shock protein A9 (HSPA9), a member of the heat shock protein family, is a putative receptor for Tembusu virus (TMUV). By using Western blot and co-immunoprecipitation assays, E protein domains I and II were identified as the functional domains that facilitate HSPA9 binding. Twenty-five overlapping peptides covering domain I and domain II sequences were synthesized and analyzed by using an HSPA9 binding assay. Two peptides showed the capability of binding to HSPA9. Dot blot assay of truncated peptides indicated that amino acid residues 19 to 22 and 245 to 252 of E protein constitute the minimal motifs required for TMUV binding to HSPA9. Importantly, peptides harboring those two minimal motifs could effectively inhibit TMUV infection. Our results provide insight into TMUV-receptor interaction, thereby creating opportunities for elucidating the mechanism of TMUV entry.

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