在多位酸化之前和之后的内在无序蛋白质的构造性质的序列决定因素
Erik W Martin1, Alex S Holehouse2, Christy R Grace1
1Department of Structural Biology, St. Jude Children's Research Hospital , 263 Danny Thomas Place, Memphis, Tennessee 38105, United States.
Journal of the American Chemical Society
|November 4, 2016
概括
细胞信号中的内在无序蛋白区域 (IDR) 即使在多位化后也保持灵活性. 生物物理研究表明酸化不会改变Ash1的IDR
科学领域:
- 生物化学
- 分子生物学
- 生物物理
背景情况:
- 细胞信号依赖于内在无序的蛋白质区域 (IDR).
- 多站点化调节了IDR功能.
- 在IDR中的形态变化对于它们的生物作用至关重要.
研究的目的:
- 量化Ash1内在无序区域 (IDR) 的构造性质.
- 调查多位化对Ash1 IDR形状的影响.
- 将序列特征与IDR形态动态相关联.
主要方法:
- 生物物理研究
- 分子模拟
- 序列模式的分析
主要成果:
- 非化Ash1 IDR呈现出膨胀,卷状的形状.
- Ash1的多位化不会改变整体形状性质.
- 形状的变化是由普罗林和充电残留物影响的补偿局部和远程接触解释的.
结论:
- 由于依赖序列的补偿效应,Ash1 IDR的形状对多位酸化不敏感.
- 控制Ash1 IDR行为的序列特征可能适用于其他多站点化IDR.
- 这些发现为细胞信号通路中的IDRs调节提供了洞察力.
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