在开花植物基因调节中招募,重新连接和深度保护
Leo A Baumgart1, Sharon I Greenblum2, Abraham Morales-Cruz2
1Joint Genome Institute, Lawrence Berkeley National Laboratory, US Department of Energy, Berkeley, CA, USA. lbaumgart@lbl.gov.
Nature plants
|July 15, 2025
概括
研究人员在10种植物物种中绘制了转录因子结合点 (TFBS) 地图. 他们发现保存的TFBS对基因调节和发育作用至关重要,揭示了植物进化的洞察力.
科学领域:
- 植物生物学 植物生物学
- 基因组学就是基因组学.
- 进化生物学是进化的生物学.
背景情况:
- 转录因子 (TFs) 通过与特定的DNA序列 (TFBSs) 结合来调节基因表达.
- 了解TF约束和监管演变对于植物适应至关重要,但目前的方法在规模和范围上是有限的.
- 现有的TFBS预测往往缺乏实验验证,大规模的绑定地图很少,特别是在多种物种之间.
研究的目的:
- 开发一种可扩展的试验,用于全基因组的转录因子结合位点 (TFBS) 映射.
- 为跨多种植物物种的众多TF创建TFBS综合图谱.
- 研究TFBS在开花植物中的进化动态和功能意义.
主要方法:
- 为全基因组TFBS映射开发一个可扩展的试验.
- 测试的应用产生了近3000个TFBS地图,用于360个TFs.
- 分析了TFBS在1亿5千万年前的10种植物物种的保护和功能.
- 与单核RNA测序数据的整合,将TFBS与基因表达和发育角色联系起来.
主要成果:
- TF正统学家在远处的物种中表现出保留的结合偏好.
- 在进化时间尺度上,TFBS的广泛增加和减少发生.
- 保存的TFBS在功能调节区域中富含,并与细胞类型特定的基因表达相关.
- 古老的监管模块被重新用于适应,这有助于草的成功.
结论:
- 这项研究为了解TF结合的演变和功能提供了一个强大的框架.
- 保存的TFBS作为TF活动和发展角色的可靠标记.
- 监管要素的演变,包括TFBS动态,是植物适应和多样化的关键驱动因素.
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