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非正规的转录启动主要是组织特异性的,并且在古多类植物中以表观遗传学调节
Xutong Wang1,2,3, Jingbo Duan1,2, Chancelor B Clark1,2
1Department of Agronomy, Purdue University, West Lafayette, IN 47907, USA.
The Plant cell
|November 14, 2024
概括
替代转录启动 (ATI) 在真核生物中很普遍. 这项研究揭示了大豆基因编码序列中的ATI,受表观遗传因素的影响,并与组织特异性功能相关.
科学领域:
- 基因组学就是基因组学.
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
- 分子生物学分子生物学
背景情况:
- 替代转录启动 (ATI) 是真核生物中常见的基因表达调节剂.
- 全面影响,演变和ATI的监管仍然在很大程度上未被探索.
研究的目的:
- 通过使用高通量测序,在大豆组织中识别和分析转录起点 (TSS).
- 研究ATI在改变基因产品中的作用及其与基因组和表观基因组因素的关联.
主要方法:
- 用高通量测序 (STRIPE-seq) 对促进子元素的转录启动进行调查,对大豆 (Glycine max) 中的TSS进行全基因组识别和分析.
- 分析TSS集群/区域 (TSR) 的分布,与开放的读取框架的关联以及组织特异性的分析.
- 检查与内基ATI相关的表观遗传标记和核细胞定位.
主要成果:
- 在37,911个大豆基因中确定了193,579个TSS集群/区域 (TSR).
- 发现43.5%的TSR发生在正规促进子区域之外,影响24,131个基因的开放阅读框架.
- 在编码序列 (CDS) 中发现了6,845个ATI基因,表现出组织特异性和独特的表观遗传特征.
- 观察到重复的基因具有更多的TSR,较低的组织特异性和更强的净化选择.
结论:
- 在CDS中ATI是表观遗传调节,并有助于大豆的组织特异性基因功能.
- 基因组因素,如基因复制,影响ATI模式和进化.
- 这项研究强调了ATI在塑造古多类真核生物的基因表达和进化中的重要性.
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