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A型流感病毒M2通道蛋白开闭机制:His37和Trp41间的氢键及阳离子-π作用的计算研究 被引量:2

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摘要 A型流感病毒的M2蛋白为一四聚的离子通道.实验结果显示,通道的通透性可能与His37间的氢键网络,以及His37-Trp41间的阳离子-π作用网络有关.以4-甲基咪唑间的氢键网络模拟通道His37间的氢键作用,以质子化4-甲基咪唑和吲哚芳环体系来模拟His37和Trp41间的阳离子-π作用,用量子化学MP2/6-311G**方法开展计算研究.结果显示,氢键网络中咪唑环间的每个N—H…N氢键作用强度可达-6.2kcal.mol-1;阳离子-π作用网络中的每对阳离子-π作用最高可达-18.8kcal.mol-1(T-型作用构象)或-12.3kcal.mol-1(平行堆积型).因此,我们计算得到的作用能表明,通过pH调控氢键作用和阳离子-π作用网络进而调控M2通道的通透性是可能的.
出处 《中国科学(B辑)》 CSCD 北大核心 2008年第4期340-346,共7页 Science in China(Series B)
基金 国家自然科学基金(批准号:20572117) 上海市博士后科研资助计划(批准号:Y200-2-08)项目
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