通过与PnMYB1的相互作用,PnMYB4在Panax notoginseng中负面调节氨酸生物合成
Jinhui Man1, Yue Shi2, Yuying Huang1
1School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing 102488, China.
Horticulture research
|August 11, 2023
概括
一种新型抑制剂,PNMYB4,可以控制Panax notoginseng中的氨酸产量. 抑制PnMYB4可以提高沙宁水平,为提高这种药用草药的疗效提供了一种新的策略.
科学领域:
- 植物分子生物学 植物分子生物学
- 自然产品生物合成 自然产品生物合成
- 药用化学 医学化学
背景情况:
- 来自Panax notoginseng的沙素对心血管和脑血管药物至关重要.
- 在P.notoginseng中调控沙素生物合成的调控网络在很大程度上仍然未被阐明.
研究的目的:
- 调查R2R3-MYB转录因子在P.notoginseng中调节沙素生物合成中的作用.
- 为了确定参与对萨波宁积累的转录控制的关键调节者.
主要方法:
- 在P.notoginseng calli中进行基因表达分析,其中有抑制的PnMYB4.
- 促进体结合测试以评估PnMYB4与目标基因的相互作用.
- 分析PnMYB4,PnMYB1和PnbHLH之间的蛋白质与蛋白质相互作用.
主要成果:
- PnMYB4 作为转录抑制剂,抑制了氨酸的积累.
- 抑制PnMYB4显著增加了沙宁含量和基因表达.
- PnMYB4直接与关键的氨酸生物合成基因 (PnSS,PnSE,PnDS) 的促进体结合.
- PnMYB4与激活剂PnMYB1竞争,以与PNBHLH结合,这是一个积极的调节器.
结论:
- 一个复杂的调节模块,包括正 (PnMYB1) 和负 (PnMYB4) MYB调节器,控制着氨酸的生物合成.
- 这项研究为改善P. notoginseng. 的沙素含量和治疗疗效提供了基础.
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