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Updated: Jun 1, 2025

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氨基酸-mTOR通路相关的转录因子GATAβ4调节了Bombyx mori中的储存蛋白的表达
Jiamin Yan1, Haonan Dong1, Yuanyuan Sun1
1Integrative Science Center of Germplasm Creation in Western China (CHONGQING) Science City, Biological Science Research Center, Southwest University, Chongqing 400715, China.
International journal of biological macromolecules
|January 17, 2025
概括
营养信号调节昆虫储存蛋白 (SP) 的表达. 这项研究确定了BmGATAβ4作为一个关键的转录因子,将氨基酸和mTOR信号连接到Bombyx mori中的SP上调.
科学领域:
- 昆虫分子生物学 昆虫分子生物学
- 营养信号通道的营养信号通道.
- 基因调节 基因调节
背景情况:
- 储存蛋白 (SPs) 对于昆虫的发育和变形至关重要.
- 特别是在对营养的反应中,SP表达的调节机制尚未完全理解.
- 之前,FoxO被确定为Bombyx mori.中的SPs的负调节剂.
研究的目的:
- 阐明Bombyx mori.中储存蛋白 (SP) 表达的调节机制.
- 确定关键的转录因子和参与营养介导的SP调节的信号通路.
主要方法:
- 在体外脂肪体培养以评估氨基酸和拉巴胺对BmSP表达的影响.
- 在BmE细胞中过度表达GATA家族转录因子.
- 在Bombyx mori幼虫的体内研究.
- 路西法酶记者测定,电泳运动转移测定 (EMSA) 和染色体免疫沉 (ChIP).
主要成果:
- 氨基酸调高了BmSP的表达,而拉帕米辛则在体外和体内调低了它的表达.
- BmGATAβ4被确定为BmSP表达的显著正调节者.
- 氨基酸-mTOR信号通路调节了BmGATAβ4的表达.
- BmGATAβ4直接与BmSP1促进体上的GATA类CRE 1-1和CRE 2-2位点结合.
结论:
- BmGATAβ4充当关键的转录因子,将营养物质的可用性 (氨基酸和mTOR信号) 与Bombyx mori.的储存蛋白质表达联系起来.
- 这项研究为控制昆虫中营养蛋白调节的分子机制提供了新的见解.
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