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玉米中可转移元素的监管潜力
Kerry L Bubb1, Morgan O Hamm1, Thomas W Tullius2
1Department of Genome Sciences, University of Washington, Seattle, USA.
bioRxiv : the preprint server for biology
|July 19, 2024
概括
长读测序揭示了可转移元素 (TE) 如何影响植物基因调节. 在TEs的新型表观遗传模式显示了它们在基因促进和放大中的作用.
科学领域:
- 植物基因组学 植物基因组学
- 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:
- 植物基因组富含可转移元素 (TE),这些元素可以影响基因调节.
- 简读测序限制了对单个测试实验及其监管作用的研究.
研究的目的:
- 通过使用长读测序,全面地绘制可访问的染色体区域 (ACR) 和CpG甲基化在整个玉米基因组.
- 研究可移植元素 (TE) 的监管潜力和表观遗传特征.
主要方法:
- 使用长读色氨酸纤维测序 (Fiber-seq) 进行了测序.
- 在玉米基因组中分析可访问的染色体区域 (ACR) 和CpG甲基化模式.
主要成果:
- 纤维测量确定了玉米基因组中的ACR和CpG甲基化.
- 年轻的TE表现出明显的ACR模式,随着年龄的增长而改变.
- 在TE增强剂中发现了一种新的植物特异性表观遗传特征,即同时超CpG甲基化和染色质可访问性.
- TE ACRs被重新定型为基因促进体,TEs可以驱动基因放大.
- 一个独特的表观遗传特征 (hypo-5mCpG甲基化和扩散色素可访问性) 将TEs引导到特定的基因组位置.
结论:
- 长期阅读 Fiber-seq 提供了对 TE及其在工厂中的监管作用的全面了解.
- 可转移元素具有显著的调节潜力,通过独特的表观遗传机制影响基因表达,放大和基因组组织.
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