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关于JULGI-SMXL4/5模块在血管精子中花发育的演变

Chanyoung Park¹, Hyun Seob Cho¹, Yookyung Lim²

¹Department of Life Sciences, Pohang University of Science and Technology, Pohang 37673, Korea.

Proceedings of the National Academy of Sciences of the United States of America

|March 7, 2025

概括

结合RNA的蛋白质JULGI通过控制MAX2-LIKE (SMXL) 基因的抑制剂来调节植物的发育. 在生苗中,JULGI将SMXL4/5与strigolactone信号解,使其能够独立地发育花.

科学领域:

植物分子生物学植物分子生物学
发展生物学发展生物学
植物生理学植物生理学

背景情况:

种子植物 (芽植物和体芽植物) 具有双面变异体,用于体/体生产,以及单足的生长架构.
MAX2-LIKE (SMXL) 抑制器基因对于花发育至关重要,并通过strigolactone信号来调节尾芽的生长.
一种RNA结合蛋白JULGI是SMXL4和SMXL5的唯一已知的调节剂,但它与strigolactone信号的相互作用尚不清楚.

研究的目的:

调查JULGI在SMXL4/5表达中的调节作用及其与血管精子中strigolactone信号传递的关系.
了解血管植物中JULGI和SMXL基因的进化保护和功能分歧.

主要方法:

在血管植物组织中对JULGI和SMXL基因表达的比较分析.
在阿拉比多普西斯突变物 (jul1 jul2, smxl4 smxl5) 中使用异质表达的功能性表征.
对SMXL蛋白稳定性的分析,以应对strigolactone模拟治疗.

主要成果:

朱尔吉直接调节苗中SMXL4/5的表达,将其与strigolactone信号脱.
血管精子SMXL4/5mRNA的5' UTR中的一种保存的富G元素作为负调节的JULGI标位.
血管精子SMXL4/5蛋白质缺乏降解动机,与祖先的SMXL不同,赋予了抵抗力,以抵抗杆菌素诱导的蛋白质体降解.

结论:

血管精子中的JULGI-SMXL4/5调节模块允许独立控制花发育.
在SMXL4/5中5' UTR的演变可能促进了血管精子中strigolactone信号通路的分歧.
这种监管创新有助于血管苗的适应性成功.

关键词:

血管精子是什么意思体的发育和发展.植物进化植物进化没有翻译过的地区.指蛋白质是一种指蛋白质.

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