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基于分子对接技术的拟南芥植酸酶的水解特性
Authors
丁君辉
周敏
+5 more
彭晓赟
徐文忠
王若仲
萧浪涛
袁凡
Publication date
1 January 2019
Publisher
Doi
Cite
Abstract
采用生物信息学、同源建模、分子对接等方法,对拟南芥植酸酶(ATMINPP)的功能结构及其与植酸的分子对接模式进行了预测。结果表明:ATMINPP由487个氨基酸组成,其二级结构由18个α螺旋、6个β折叠、伸展片段和无规则卷曲等4个主要部分构成;保守半胱氨酸在螺旋结构之间形成4个二硫键;ATMINPP蛋白有2个结构域(α/β–结构域和α–结构域),活性位点位于2个结构域的中间;对接时,带负电的植酸结合在ATMINPP带正电的亲水性口袋内;保守序列RHGARYP中的His 66对植酸氢键所结合的磷酸基团进行亲核攻击,形成中间复合物,中间复合物水解得到磷酸和磷酸肌醇衍生物,His 343为解离基团氧原子提供质子,使得磷酸基团解离
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Last time updated on 09/06/2022