酸盐缺乏通过替代转录起点改变转录异型
Rodrigo S Reis1,2, Joaquín Clúa1, Aime Jaskolowski1
1Department of Plant Molecular Biology, University of Lausanne, Biophore Building, Lausanne, CH-1015, Switzerland.
The Plant journal : for cell and molecular biology
|August 21, 2024
概括
无机酸盐 (Pi) 的可用性调节了Arabidopsis中的替代转录起点 (TSS),影响了基因表达和植物发育. 这项研究揭示了Pi缺乏特别改变TSS使用,影响翻译和本地化,并突出了m6A阅读器在根生长中的作用.
科学领域:
- 植物分子生物学 植物分子生物学
- 基因规则 基因规则
- 植物生理学 植物生理学
背景情况:
- 替代转录起点 (TSS) 在真核生物中很常见,影响mRNA 5' UTR长度和蛋白质编码潜力.
- 植物激素治疗已经显示出对TSS使用的影响,但对营养素可用性的影响,如无机酸盐 (Pi),理解较少.
研究的目的:
- 调查无机酸盐 (Pi) 可用性在调节 Arabidopsis thaliana 替代转录起点 (TSS) 使用中的作用.
- 描述Pi调节的替代TSS对基因表达,翻译和亚细胞局部化的下游影响.
主要方法:
- 结合短读和长读RNA测序以识别和分析全长mRNA与替代TSS.
- 生物信息分析以识别在Pi缺乏下差异性TSS使用的基因.
- 功能分析评估替代TSS对蛋白质翻译,亚细胞局部化和根部发育的影响.
主要成果:
- 鉴定了45个基因在Pi缺乏下改变了TSS使用,与植物激素相比,Pi具有特定和明显的效果.
- 证明了替代的TSS影响翻译 (例如,RLB1中的上游开放阅读框架) 和亚细胞局部化 (例如,HO1和SQDG2中的塑过渡).
- 发现了一种新型的短非编码转录 (ALTECT4),由Pi缺陷下的ECT4位点中的替代TSS生成,涉及Pi响应和根介质细胞分裂中的m6A读者.
结论:
- 替代TSS的使用是植物对无机酸盐 (Pi) 缺乏的反应的一个重要的调节机制.
- Pi调节的替代TSS有助于调节基因功能,包括翻译,局部化和非编码RNAs的生成.
- 这项研究揭示了m6A阅读器在低Pi条件下调解主要根生长的新作用,与铁代谢和根介质系统活动有关.
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