针对Glu-1的转录因子的高效全蛋白体识别:在小麦中对TaB3-2A1的功能验证的案例研究
Lina Xie1,2, Siyang Liu1, Yong Zhang1
1Institute of Crop Sciences, National Wheat Improvement Centre, Chinese Academy of Agricultural Sciences (CAAS), Beijing, China.
Plant biotechnology journal
|June 29, 2023
概括
研究人员确定了31种转录因子 (TFs),这些因子与小麦关键基因调节器 (CCRM1-1) 结合. 过度表达TaB3-2A1 TF减少了种子储存蛋白和增加了粉,为小麦改进提供了一个新的基因.
科学领域:
- 植物分子生物学 植物分子生物学
- 小麦遗传学 小麦遗传学
- 基因规则 基因规则
背景情况:
- 高分子量谷蛋白子单位 (HMW-GS) 对于小麦加工质量至关重要,主要在转录层面进行调节.
- 晶体调节模块CCRM1-1对于高体特异性Glu-1基因表达是必不可少的,但其相互作用的转录因子 (TFs) 是未知的.
研究的目的:
- 为了确定与CCRM1-1 cis-regulatory模块结合的TFs.
- 阐明确定TFs在调节小麦HMW-GS表达和代谢平衡中的作用.
主要方法:
- 开发了一种与液体染色体-质谱平台相结合的DNA下拉,用于在小麦中进行TF识别.
- 使用酵母单杂交和电泳性移动性转移试验来确认TF-DNA结合.
- 进行了交换活化测试,基因过度表达,转录组分析和单个样本分析.
主要成果:
- 确定了31个与CCRM1-1相互作用的TF,包括TaB3-2A1,已确认它与CCRM1-1结合.
- TaB3-2A1抑制了CCRM1-1驱动的转录,其过度表达减少了HMW-GS和其他种子储存蛋白,同时增加了粉含量.
- 转录组分析显示,TaB3-2A1通过降低储存蛋白质基因和上调粉合成基因来调节碳和代谢.
- 确定了两种TaB3-2A1单元型,其中Hap1与较低的蛋白质和较高的粉,植物高度和谷物重量相关,显示出积极选择的证据.
结论:
- TaB3-2A1作为HMW-GS表达的抑制剂,并整合了代谢途径,平衡了蛋白质和粉的合成.
- 已识别的TF和开发的平台为了解Glu-1基因调节提供了宝贵的资源.
- TaB3-2A1呈现出一个有前途的目标基因,通过育种计划提高小麦的质量和产量.
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