非催化和催化TREHALOSE-6-PHOSPHATE SYNTHASES与RAMOSA3相互作用,以控制玉米的发展.
Thu M Tran1, Hannes Claeys1,2, María Jazmín Abraham-Juárez3
1Cold Spring Harbor Laboratory, 1 Bungtown Road, Cold Spring Harbor, NY 11724, USA.
bioRxiv : the preprint server for biology
|October 1, 2025
概括
在玉米中,非催化性三六酸盐合成酶 (TPS) 与催化性三六酸盐合成酶和三六酸盐酸酶 (TPP) 相互作用,通过形成刺激酶活性的蛋白质复合体来调节植物发育.
科学领域:
- 植物生物学 植物生物学
- 生物化学 生物化学
- 分子遗传学 分子遗传学
背景情况:
- 三醇-6-酸盐 (Tre6P) 是三醇生物合成的关键中间体.
- 植物TPS和TPP基因家族包含具有调节性,非催化功能的成员.
- 玉米突变型的ramosa3 (ra3) 呈现出花分支的增加,并编码了一个催化TPP.
研究的目的:
- 研究玉米中非催化性TPS蛋白的功能.
- 阐明植物发育中的TPS和TPP蛋白之间的相互作用.
- 了解三糖生物合成的调节机制.
主要方法:
- 玉米突变的遗传分析 (ra3,ZmTPS1,ZmTPS12,ZmTPS11,ZmTPS14). 这是一个非常好的方法.
- 蛋白相互作用研究 (共免疫沉).
- 在体外酶活性测定和AlphaFold结构预测.
主要成果:
- 非催化性玉米ZmTPS1与催化性TPP RA3和催化性TPS ZmTPS14相互作用.
- 在ZmTPS1和ZmTPS12中的突变增强了ra3突变表型.
- ZmTPS1刺激RA3和ZmTPS14的结合活性,形成一个功能复合体.
结论:
- 非催化性TPS蛋白在植物发育中起着至关重要的调节作用.
- 非催化TPS,催化TPS和TPP蛋白之间的复杂形成对于调节三糖生物合成和植物结构至关重要.
- 这些发现揭示了植物代谢途径中一种新的调节机制.
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