在RNA-蛋白相互作用的结合部位外的indel多态的结构效应是由选择形成的选择
Carlos Owusu-Ansah1, Elan Shatoff2,3, Ralf Bundschuh1,2,3,4,5
1Interdisciplinary Biophysics Graduate Program, The Ohio State University, Columbus, Ohio, United States of America.
PLoS computational biology
|October 21, 2025
概括
称为indels的基因组变异可以通过改变蛋白质结合部位之外的RNA结构来改变基因调节. 净化选择有利于自然的内接,导致较小的结合变化,特别是在HuR结合部位附近.
科学领域:
- 基因组学就是基因组学.
- 分子生物学分子生物学
- 生物信息学是一种生物信息学.
背景情况:
- 基因组变异通过改变基因调节来影响生物体的特征和健康状况.
- 在3'未翻译区域的变异影响RNA-蛋白结合和转录后基因调节.
研究的目的:
- 调查RNA-蛋白质结合位外的indel变异如何影响结合亲缘关系.
- 确定RNA二次结构在调解这些效应中的作用.
- 评估自然选择对结合地点附近的体变体的影响.
主要方法:
- 由indels引起的RNA二次结构变化的计算建模.
- 对与野生类型和内基突变RNA序列的蛋白质结合 afinities 的分析.
- 自然的英德尔多态与合成的英德尔多态的比较.
- 在HuR结合位点附近检查序列上下文弹性.
主要成果:
- 结合部位以外的印尔通过影响RNA结构显著改变蛋白质结合亲和力.
- 结合亲和力变化的大小随着长度的增加而增加,直到和点.
- 自然的indel多态表现出比合成indels更小的结合亲和力变化,表明净化选择.
- 这种选择性压力在HuR结合部位附近更强,这些部位对内基因突变的弹性增加.
结论:
- 印德尔变体可以通过以距离为媒介的结构效应来调节RNA-蛋白相互作用.
- 净化选择通过过出破坏性indel变异来维持功能性RNA-蛋白相互作用.
- 了解这些机制对于解释基因组变异的功能影响至关重要.
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