染色体重塑因子BrCHR39通过辅助信号在Brassica rapa中积极调节顶主导
Jiayin Liu1, Lanlan Yang1, Wei Zhu1
1Henan International Joint Laboratory of Crop Gene Resource and Improvements, School of Agricultural Sciences, Zhengzhou University, Zhengzhou 450001, China.
Plant & cell physiology
|July 11, 2025
概括
BrCHR39通过辅酶信号控制顶主导作用,积极调节植物生长. 沉默这个基因会损害生长,但是奥克辛的应用会恢复Brassica rapa的正常发育.
科学领域:
- 植物分子生物学 植物分子生物学
- 基因调节 基因调节
- 染色体重塑 染色体重塑 的方法
背景情况:
- SHPRH亚家族蛋白质是染色质重塑剂,已知在哺乳动物的DNA修复中起作用.
- 植物中SHPRH成员的功能在很大程度上尚未被探索.
- 之前,Brassica rapa中的BrCHR39被确定为具有功能意义的.
研究的目的:
- 为了研究BrCHR39在Brassica rapa中的功能.
- 阐明BrCHR39在植物发育和基因表达中的作用.
- 确定BrCHR39在顶端主导中的功能背后的分子机制.
主要方法:
- 对于BrCHR39基因沉默的RNA干扰 (RNAi).
- 转基因Brassica rapa线的表型分析.
- 对辅酶相关基因表达的分析.
- 外源性auxin应用实验. 外源性auxin应用实验.
- 蛋白质与蛋白质相互作用试验 (BrCHR39和Brask18).
主要成果:
- 通过RNAi介导的BrCHR39的淘汰导致顶主导性受损,半矮体,并增加了尾芽的增长.
- 抑制BrCHR39导致帕伦基马的细胞分裂减少,以及与auxin相关的基因的表达减少.
- 外源性奥克辛的应用在沉默植物中挽救了顶主导现象型.
- BrCHR39与BrASK18相互作用,表明它在辅酶信号传递中的作用.
结论:
- BrCHR39积极调节了Brassica rapa的顶峰主导地位.
- BrCHR39的功能通过辅酶信号通路进行介导.
- BrCHR39通过调节辅酶反应,在植物发育中发挥关键作用.
更多相关视频
相关概念视频
Cell Signaling in Plants
5.8K
Plant cells communicate to coordinate their cycle of growth, flowering and fruiting, and activities in roots, shoots, and leaves in response to the changing environmental conditions. Plant signaling is distinct from animal signaling. Plants primarily utilize enzyme-linked receptors, whereas the largest class of cell-surface receptors in animals are G-protein coupled receptors (GPCRs). Unlike animals, receptor tyrosine kinases are rare in plants. Instead, plants have a diverse class of...
5.8K
Chromatin Modification in iPS Cells
1.9K
Chromatin modification alters gene expression; therefore, scientists can add histone-modifying enzymes, histone variants, and chromatin remodeling complexes to somatic cells to aid reprogramming into pluripotent stem (iPS) cells.
Compact chromatin makes reprogramming difficult. Enzymes, such as histone demethylases and acetyltransferases, are often added during reprogramming to loosen the chromatin, making the DNA more accessible to transcription factors. Molecules that inhibit histone...
Compact chromatin makes reprogramming difficult. Enzymes, such as histone demethylases and acetyltransferases, are often added during reprogramming to loosen the chromatin, making the DNA more accessible to transcription factors. Molecules that inhibit histone...
1.9K
Chromatin Structure Regulates pre-mRNA Processing
7.2K
In eukaryotic cells, nascent mRNA transcripts need to undergo many post-transcriptional modifications to reach the cell cytoplasm and translate into functional proteins. For a long time, transcription and pre-mRNA processing were considered two independent events that occur sequentially in the cell. However, it has now been well established that transcription and pre-mRNA processing are two simultaneous processes that are precisely regulated inside the cell.
The chromatin structure, especially...
The chromatin structure, especially...
7.2K
Co-activators and Co-repressors
7.6K
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...
7.6K
Chromatin Position Affects Gene Expression
23.7K
Chromatin is the massive complex of DNA and proteins packaged inside the nucleus. The complexity of chromatin folding and how it is packaged inside the nucleus greatly influences access to genetic information. Generally, the nucleus' periphery is considered transcriptionally repressive, while the cell's interior is considered a transcriptionally active area.
Topologically Associated Domains (TADs)
The 3-dimensional positioning of chromatin in the nucleus influences the...
Topologically Associated Domains (TADs)
The 3-dimensional positioning of chromatin in the nucleus influences the...
23.7K
Inheritance of Chromatin Structures
6.6K
Epigenetics is the study of inherited changes in a cell's phenotype without changing the DNA sequences. It provides a form of memory for the differential gene expression pattern to maintain cell lineage, position-effect variegation, dosage compensation, and maintenance of chromatin structures such as telomeres and centromeres. For example, the structure and location of the centromere on chromosomes are epigenetically inherited. Its functionality is not dictated or ensured by the underlying...
6.6K


