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来自Pisum sativum的三维溶液结构,动力学和结合的thioredoxin m的三维溶液结构和动力学

José L Neira¹, Martina Palomino-Schätzlein², Virginia Rejas³

¹IDIBE, Universidad Miguel Hernández, 03202 Elche, Alicante, Spain; Instituto de Biocomputación y Física de Sistemas Complejos (BIFI), Universidad de Zaragoza, 50018 Zaragoza, Spain.

International journal of biological macromolecules

|January 31, 2024

概括

我们确定了 pea thioredoxin m (TRX m) 的溶液结构,揭示了其典型的 TRX 折叠. 这个TRXm从低微分子范围的果糖-1,6-双酶 (FBPase) 结合一个.

科学领域:

生物化学生物化学
结构生物学结构生物学
植物科学植物科学

背景情况:

铁素 (TRXs) 是重要的小蛋白质,调节细胞的氧化还原平衡.
了解TRX结构-功能关系对于破译氧化还原信号通路至关重要.
Pea thioredoxin m (TRX m) 在植物代谢调节中起作用.

研究的目的:

为了确定来自Pisum sativum (豆) 的TRX m的溶液结构.
研究 pea TRX m 与一种由果糖-1,6-双酶 (FBPase) 衍生而来的酸之间的结合相互作用.

主要方法:

核磁共振 (NMR) 光谱学,包括核过度修复效应 (NOE) 约束,用于确定3D结构.
使用光和NMR定位实验来研究蛋白质-的结合亲和力.
对残留动态和交叉峰值强度的分析提供了对约束效应的见解.

主要成果:

阐明了 pea TRX m 的溶液结构,表现出特有的 TRX 折叠,其中有一个中心的 β 片和周围的 α 螺旋.
活动地点附近的残留物和特定环节显示出显著的动态贡献.
TRX m与微分子亲和度低的FBPase的片段结合,这种结合影响了通过NMR观察到的TRX m的整体结构.

结论:

确定的结构为 pea TRX m.提供了高分辨率模型.
结合FBPase与TRXm的结合亲和力比完整的FBPase更弱,这表明完整的蛋白质中存在额外的调节元素.
这项研究增强了我们对植物中铁素介导调节的理解.

关键词:

光是一种光效应.果糖-1,6-双酸盐酸酶是什么这就是NMR的NMR.这是一种类.蛋白质与蛋白质的相互作用提奥雷多克辛 (Thioredoxin) 是一种强毒素.

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