核因子-Y-多组复合抑制复合体2在小麦中动态调节粉和种子储存蛋白质生物合成
Jinchao Chen1,2, Long Zhao1,2, Haoran Li1
1Key Laboratory of Plant Cell and Chromosome Engineering, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China.
The Plant cell
|September 18, 2024
概括
研究人员确定了一种小麦核因子-Y (NF-Y) 复合体,该复合体调节了内的发育. 这种复合物与Polycomb抑制复合物2 (PRC2) 相互作用,控制粉和蛋白质水平,为提高谷物产量和质量提供了潜力.
科学领域:
- 植物分子生物学 植物分子生物学
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
- 谷物作物科学 谷物作物科学
背景情况:
- 谷物谷物中内的发展对于产量和质量至关重要,主要是通过粉和种子储存蛋白 (SSP) 的生产.
- 核因子-Y (NF-Y) 复合体是已知的转录调节剂,但它们在小麦内的发展和表观遗传控制中的特定作用尚未完全理解.
研究的目的:
- 为了识别和表征一种特定的NF-Y三基复合物,参与小麦内的发展.
- 阐明这种NF-Y复合物调节粉和SSP生物合成的分子机制.
- 为了研究NF-Y复合体,Polycomb抑制复合体2 (PRC2) 和控制基因表达的表观遗传修饰之间的相互作用.
主要方法:
- 在谷物填充过程中,在内精中表达高的小麦NF-Y三元复合体 (TaNF-YA3-D,TaNF-YB7-B,TaNF-YC6-B) 的鉴定.
- 基因淘汰实验以评估TaNF-YA3和TaNF-YC6对粉和蛋白质含量的影响.
- 与粉生物合成和蛋白质积累相关的基因表达的分析.
- 研究NF-Y成分,TASWN (PRC2亚单元) 和基因素修饰 (H3K27me3) 之间的相互作用.
- 分析TaNF-YB7-B的序列变化及其与粒度组成的相关性.
主要成果:
- 淘汰TaNF-YA3或TaNF-YC6降低了粉,但增加了质蛋白水平.
- TaNF-Y通过抑制TaNAC019间接抑制粉生物合成基因 (例如,TacAGPS1a,TaSuS2),并直接抑制gliadin和LMW-GS基因.
- 该TaNF-Y复合体与TaSWN (PRC2) 相互作用,以调解基于H3K27me3的目标基因表观遗传抑制.
- 在TaFIE (PRC2子单元) 中的突变和TaNF-YB7-B单元型的变异通过改变TaSWN相互作用和目标基因抑制来影响粉和SSP含量.
结论:
- 一个小麦NF-Y-PRC2复合体在表观遗传调节内体发育,平衡粉和蛋白质积累方面发挥着至关重要的作用.
- 了解这些复杂的分子机制为优化谷物产量和小麦质量提供了洞察力.
- 针对TaNF-Y复合体提供了一个潜在的作物改善策略.
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