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通过Ca2+离子调节RGLG2-VWA

MeiLing Zhang¹, JiaXiang Zhang¹, Yan Liang¹

¹Department of Biochemistry and Molecular Biology, Binzhou Medical University, YanTai, ShanDong 264003, PR China.

Biochimica et biophysica acta. Proteins and proteomics

|September 21, 2023

概括

离子在全质上调节了Arabidopsis thaliana的E3无处不在联酶RGLG2. 该规则涉及其VWA领域的结构变化,影响激素信号和干旱反应.

科学领域:

植物分子生物学植物分子生物学
结构生物学是结构生物学.
生物化学生物化学

背景情况:

RGLG2是Arabidopsis thaliana中的E3泛素酶,参与激素信号传递和干旱调节.
VWA (Von Willebrand factor A) 域是各种蛋白质中发现的关键蛋白质模块,通常参与蛋白质-蛋白质相互作用.

研究的目的:

阐明RGLG2通过离子调节的结构基础.
了解RGLG2 VWA域在应对结合时的结构动态.

主要方法:

确定RGLG2 VWA域的两个晶体结构,代表开放和闭合的构造.
分析离子结合点及其对蛋白质结构的影响.

主要成果:

通过X射线结晶学确定了RGLG2 VWA域的两个不同的构造 (开放式和封闭式).
离子充当全调节剂,通过新离子结合部位1 (NCBS1) 稳定开放形状.
RGLG2 VWA域在其封闭的,低亲和度的状态中表现出独特的伪连接体结合.

结论:

离子在调节RGLG2 VWA域的构造和潜在的功能方面发挥着至关重要的作用.
鉴定的全调节机制提供了关于RGLG2如何将信号与其在植物激素信号和应激反应中的作用相结合的见解.
在植物生物学中,RGLG2 VWA域的独特结合特性可能代表了一种新的调节机制.

关键词:

离子的结合部位是离子的结合部位.封闭状态封闭状态规范性变化规范性变化开放状态开放状态 VWA 域名 VWA 域名

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