基于序列的基因组H1后翻译修改效应的预测:影响与功能相关的特征
1Division of Medical Biology, Institute of Biology, Jan Kochanowski University in Kielce, Kielce, Poland.
Journal of biomolecular structure & dynamics
|February 14, 2024
概括
转化后的修改,如乙化和甲基化,显著改变了组织素H1蛋白特征,影响了溶解性,稳定性和结合亲和力. 这些修改对于理解基因素H1功能至关重要.
科学领域:
- 生物化学 生物化学
- 分子生物学分子生物学
- 遗传学 是一个遗传学.
背景情况:
- 基因组H1蛋白在染色质结构和基因调节中起着至关重要的作用.
- 已知转化后修饰 (PTMs) 调节了基因素活性,但它们对基因素H1物理化学和分子性质的具体影响仍然在很大程度上未被探索.
研究的目的:
- 调查常见的PTMs (乙化,甲基化,酸化,无处不在化) 如何影响基因组H1蛋白的特征.
- 分析这些修改对蛋白质溶解性,稳定性,折叠动力学,结合亲和力和内在结构障碍的影响.
主要方法:
- 利用基于不同蛋白质特征训练的基于序列的预测器.
- 分析了从UniProtKB/Swiss-Prot.获得的人类,动物,植物,真菌和原生物种的希斯H1序列.
- 通过用氨酸替换改性残留物来使用突变序列来评估特定PTMs的影响.
主要成果:
- 发现PTM可以增加蛋白质的溶解性和稳定性,加速折叠动力学,减弱结合亲和力.
- 修改也被证明可以保持更高程度的内在结构障碍.
- 在乙化,甲基化和泛化位点的有害突变比酸化位点的影响更大,这表明酸化具有更冗余的特性.
结论:
- PTM是影响 histone H1 蛋白质物理化学和分子性能的关键因素.
- 基因组H1的功能与其修饰状态密切相关,突出显示了PTMs在调节染色质动态中的重要性.
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