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副黏病毒HN与F糖蛋白的结合作用域 被引量:2

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摘要 副黏病毒囊膜表面糖蛋白有两种,即与宿主受体结合的血凝素神经氨酸酶(HN)以及介导膜融合的融合糖蛋白(F).HN与受体的结合可激活F,使其发生构象变化,从而介导病毒囊膜与宿主细胞膜的膜融合,但HN与F蛋白相互结合的区域还不清楚.用基因工程方法获得禽副流感病毒-2(APIV-2)HN蛋白球状头部区域(globularheadregion,HNH)以及F蛋白两段七肽重复区域(heptadrepeat,HR)HR1与HR2三个纯化蛋白.蛋白质体外结合实验及质谱与圆二色谱的结果表明,HNH不仅可与HR2结合,还可与HR1结合,并且结合后的蛋白构象与各组成多肽的构象不同.结果表明,HNH可能是HN蛋白与F蛋白的结合作用域.在此基础上讨论了HN激活F并引致膜融合的分子机制,可为阻止病毒膜融合寻找新策略.
出处 《科学通报》 EI CAS CSCD 北大核心 2005年第20期2231-2234,共4页 Chinese Science Bulletin
基金 国家自然科学基金(批准号:30228025) 中国农业大学科研基金(批准号:2004009)资助项后.
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同被引文献16

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