MAC5A在转录和后转录层面双重功能地调节冷反应
Shuo Wang1, Zhiyin Meng2, Hua Liu1
1State Key Laboratory for Development and Utilization of Forest Food Resources, Zhejiang A&F University, Hangzhou 311300, China; Zhejiang Key Laboratory of Non-wood Forest Products Quality Regulation and Processing Utilization, Zhejiang A&F University, Hangzhou 311300, China.
Journal of advanced research
|January 6, 2026
概括
这项研究确定MAC5A是关键的RNA结合蛋白,通过调节转录和后转录水平的冷反应基因来增强植物的耐寒性.
科学领域:
- 植物生物学 植物生物学
- 分子遗传学 分子遗传学
- 基因调节 基因调节
背景情况:
- 植物对寒冷的反应主要在转录水平上进行研究,重点关注像CBF这样的转录因子.
- 在冷反应中RNA结合蛋白 (RBPs) 的转录后作用尚未得到充分探索.
- 跨物种保护的RBPs对于了解植物适应寒冷至关重要.
研究的目的:
- 在植物物种中识别保存的冷反应RBPs.
- 研究候选RBP,MAC5A在调节植物耐寒性的作用.
- 阐明MAC5A控制冷反应基因表达的分子机制.
主要方法:
- 综合分析多个物种的基因组和转录组,以找到保存的RBP.
- 产生和分析MAC5A功能丧失和过度表达突变.
- 对比转录组学和CUT&Tag-seq以识别MAC5A调节的替代拼接和基因表达.
- 微基因和双化酶试验用于验证拼接和调节功能的验证.
主要成果:
- 鉴定了保存的冷反应性RBP,重点是Arabidopsis MAC5A,一个拼接体组件.
- MAC5A功能丧失降低了结耐受性,而过度表达增强了它.
- MAC5A调节了众多冷反应基因的替代拼接,并通过独立的途径控制了其他冷反应基因的转录表达.
结论:
- MAC5A充当双重调节剂,通过转录和后转录机制控制冷反应.
- 由MAC5A调节的独特调节途径突出显示了冷应激反应的新方面.
- 需要进一步的研究,以了解这些调节途径在寒冷压力期间的协调.
相关概念视频
02:23Master Transcription Regulators
7.7K
Master transcription regulators are regulatory proteins that are predominantly responsible for regulating the expression of multiple genes. Often these genes work in concert to drive a complex process. Activation of a master transcription regulator can lead to a cascade of transcriptional activation necessary for that outcome. These regulators can directly bind to the regulatory sequences of the various genes involved, or they can indirectly regulate transcription by binding to regulatory...
7.7K
02:23Master Transcription Regulators
2.7K
2.7K
01:23Regulation of Expression at Multiple Steps
1.3K
The gene expression in cells is regulated at different stages: (i) transcription, (ii) RNA processing, (iii) RNA localization, and (iv) translation. Transcriptional regulation is mediated by regulatory proteins such as transcription factors, activators, or repressors—these control gene expression by initiating or inhibiting the transcription of genes. Once a precursor or pre-mRNA is produced, it undergoes post-transcriptional modification, including 5' capping, splicing, and the...
1.3K
02:04Co-activators and Co-repressors
8.4K
Gene transcription is regulated by the synergistic action of several proteins that form a complex at a gene regulatory site. This is observed in eukaryotes, where the regulation of gene expression is a complex process. Regulatory proteins in eukaryotes can broadly be classified into two types – regulators that bind directly to specific DNA sequences and co-regulators that associate with regulatory proteins but cannot directly bind to the DNA. These co-regulators are further divided into...
8.4K
02:04Co-activators and Co-repressors
3.0K
3.0K
02:24Regulation of Expression Occurs at Multiple Steps
3.9K
3.9K