替代拼接支了ALMT9传输器功能,用于果中真空子酸积累
Chunlong Li1,2, Srinivasan Krishnan3, Mengxia Zhang1
1Horticulture Section, School of Integrative Plant Science, Cornell University, Ithaca, NY, 14853, USA.
Advanced science (Weinheim, Baden-Wurttemberg, Germany)
|March 22, 2024
概括
果中的活性酸盐转运体9 (ALMT9) 的替代拼接产生了调节水果酸度的异型. 这一发现揭示了蛋白质相互作用如何控制酸积累和味道.
科学领域:
- 植物生物学 植物生物学
- 分子遗传学 分子遗传学
- 水果质量水果的质量.
背景情况:
- 水果的酸度,由真空酸决定,对于味道和风味至关重要.
- 激活酸转运体9 (ALMT9),也称为Ma1,是影响果酸度的关键遗传因素.
- 通过ALMT9在塑体中运输酸盐的确切机制尚不清楚.
研究的目的:
- 阐明ALMT9/Ma1在果酸度中的作用.
- 调查替代拼接在ALMT9-介导的酸盐运输中的作用.
- 了解ALMT9异型之间的相互作用及其对酸积累的影响.
主要方法:
- 在"皇家加拉"果中,ALMT9编码序列 (Ma1α) 的过度表达.
- 分析替代拼接变体及其表达水平.
- 研究ALMT9异型之间的蛋白质-蛋白质相互作用.
- 评估酸含量和水果酸度.
主要成果:
- 过度表达Ma1α降低了水果酸度,表明了复杂的调节机制.
- 替代拼接产生两种异型:Ma1α (全长) 和Ma1β (较短).
- Ma1β与Ma1α异构,在特定值 (Ma1β/Ma1α ≥1/8) 以上协同增强酸盐运输.
- 过度表达Ma1α诱导了MYB73介导的反抑制,使Ma1β低于值,从而降低了酸盐积累.
- 共同过度表达Ma1α和Ma1β,或基因组Ma1,相应地增加了两种异构体,并增强了水果酸度.
结论:
- 替代拼接对于调节果酸度中的ALMT9功能至关重要.
- Ma1α和Ma1β异型之间的相互作用为控制酸盐运输提供了一种新的机制.
- 了解这些分子机制可以为改善水果质量的育种策略提供信息.
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