对于正确的DNA损伤反应,需要PHRF1的PHD手指对Histone H3 N-终端进行识别
Kanishk Jain1, Pata-Eting Kougnassoukou Tchara2, Amanuel B Mengistalem3
1Department of Biochemistry, Molecular Biology, and Biophysics, University of Minnesota, Twin Cities, Minneapolis, MN, USA.
bioRxiv : the preprint server for biology
|November 28, 2024
概括
PHRF1蛋白与基因素H3结合,调节基因表达和DNA损伤反应. 破坏这种相互作用的突变会损害基因组完整性,突出显示PHRF1.
科学领域:
- 分子生物学分子生物学
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
- 人类疾病 人类疾病
背景情况:
- 植物宿主体 (PHD) 的手指对于通过基因组后翻译修饰 (PTMs) 调节基因表达和基因组完整性至关重要.
- 人体中存在100多种PHD指蛋白,但许多蛋白的功能,包括PHRF1,尽管与疾病相关,但人们对其了解甚少.
研究的目的:
- 为了全面分析缺乏特征的PHD指含有蛋白质PHRF1.1,
- 阐明PHRF1在激素相互作用,基因调节和DNA损伤反应 (DDR) 中的作用.
主要方法:
- 采用了生物化学,分子和细胞方法.
- 进行了RNA测序 (RNA-seq) 和蛋白质组分析.
- 用定位突变发生 (P221L) 来评估PHD手指的功能.
主要成果:
- PHRF1直接结合于组素H3的N端区域.
- PHRF1参与转录和RNA拼接调节.
- PHRF1在DNA损伤反应 (DDR) 中发挥着重要作用.
- 在PHRF1 PHD指中将普罗林221转变为白 (P221L) 取消了基因组结合,并未能挽救有缺陷的DDR.
结论:
- 在保持基因组完整性方面,PHRF1和基因素H3之间的相互作用至关重要.
- PHRF1的PHD手指对于其在DNA损伤反应中的功能至关重要.
- 这些发现提供了关于PHD手指对染色体生物学和疾病的贡献的见解.
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