蛋白质语言模型识别了阶段分离中涉及的无序,保存的动机.
Yumeng Zhang1, Jared Zheng2, Bin Zhang1
1Department of Chemistry, Massachusetts Institute of Technology, Cambridge, United States.
eLife
|October 20, 2025
概括
内在无序区域 (IDR) 对于无膜有机体的形成至关重要. 进化分析揭示了IDR中保存的氨基酸,这表明选择的功能单元保持稳定的器官结构.
科学领域:
- 生物化学 生化学
- 分子生物学分子生物学
- 进化生物学 进化生物学
背景情况:
- 内在无序区域 (IDR) 对于蛋白相分离和无膜有机体 (MLO) 的形成至关重要.
- IDRs中的突变可以破坏分子相互作用,导致改变相位行为和疾病.
- 了解IDRs的进化约束,可以了解基于序列的相位分离.
研究的目的:
- 研究IDR中氨基酸的进化保存.
- 在IDR中使用蛋白质语言模型绘制残留水平突变耐受性景观.
- 为了将进化约束与IDRs在相隔和MLO形成中的作用相关联.
主要方法:
- 利用ESM2蛋白语言模型来预测残留水平的突变耐受性.
- 分析了多个序列对齐以确认进化约束.
- 在IDR中检查了保存的氨基酸,包括"贴纸"和"间隔器".
主要成果:
- 参与相分离的IDR显示出显著的氨基酸保存.
- 突变约束的ESM2预测与直接序列分析一致.
- 保存的氨基酸往往形成连续序列的图案,充当"贴纸"和"间隔器".
结论:
- 在IDR中保存的图案可能是稳定的MLO形成的进化选择下的功能单位.
- 在蛋白质语言模型的帮助下,进化分析揭示了相分离的分子语法.
- 这项研究强调了蛋白质序列,进化和IDRs的生物物理特性之间的相互作用.
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