确定"修改后的OPDA (mo-OPDA) "作为cis-OPDA的迈克尔添加物
Yuho Nishizato1, Yuki Muraoka1, Mai Morikawa2
1Graduate School of Science, Tohoku University, Sendai, Japan.
Bioscience, biotechnology, and biochemistry
|May 2, 2024
概括
发现植物激素前体cis-OPDA在JID1.1的酶性消化过程中形成了人工物 (cis-OPDA-2ME). 这种人工物不是真正的代谢物,表明一个未知的JID1机制调节植物中的cis-OPDA水平.
科学领域:
- 植物生物化学 植物生物化学
- 植物激素信号传递器
- 分子生物学分子生物学
背景情况:
- cis-(+) -12-Oxo-phytodienoic acid (cis-OPDA) 是一种关键的氧利,也是植物激素斯-l-异氨酸 (JA-Ile) 的前体.
- cis-OPDA 在植物对环境压力的反应中起着至关重要的作用.
- 此前已经证明,松酸诱导的二氧化酶1 (JID1) 可以将cis-OPDA转化为Arabidopsis thaliana的一种未识别代谢物 (mo-OPDA).
研究的目的:
- 为了阐明"改性OPDA (mo-OPDA) "代谢物的化学特征.
- 为了研究JID1影响Arabidopsis thaliana中cis-OPDA水平的机制.
主要方法:
- 超高性能液体色谱与三重四重质谱学 (UPLC-MS/MS) 结合使用用于代谢物识别.
- 使用JID1的酶性消化实验在cis-OPDA上进行.
主要成果:
- "mo-OPDA"被确定为cis-OPDA-2ME,这是由迈克尔在cis-OPDA中添加2-mercaptoethanol而形成的结合物.
- 这种cis-OPDA-2ME合物是在JID1消化过程中产生的工件,而不是真正的内源代谢产物.
- 之前在JID1-过度表达 (JID1-OE) 谱系中减少cis-OPDA积累的发现仍然存在,这表明一种非特征的JID1-介导的调节途径.
结论:
- 之前识别的"mo-OPDA"是一种人工物 (cis-OPDA-2ME),是JID1活动分析期间实验条件所产生的.
- 一种未知的JID1依赖机制,与直接转化为cis-OPDA-2ME不同,负责调节Arabidopsis thaliana中的内源性cis-OPDA水平.
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