在IV型多药ABC输送器中,核酸和基质结合点之间的双向通信
Victor Hugo Pérez Carrillo1, Margot Di Cesare2, Dania Rose-Sperling1
1Faculty of Chemistry and Earth Sciences, Institute of Organic Chemistry and Macromolecular Chemistry, Friedrich Schiller University Jena, Humboldtstraße 10, 07743, Jena, Germany.
Nature communications
|November 11, 2025
概括
研究人员在IV型ABC输送器中确定了一个关键的残留集群,该集群作为通信关. 这条链对于协调多药耐药中的ATP水解与基质运输至关重要.
科学领域:
- 生物化学 生物化学
- 分子生物学分子生物学
- 结构生物学 结构生物学
背景情况:
- ATP结合盒 (ABC) 运输器利用ATP来通过膜进行基质运输.
- 第四类ABC输送器,包括多药性耐药性 (MDR) ,具有核酸结合域 (NBD) 和跨膜域 (TMD),由细胞内域与合螺旋连接在一起.
- 在这些输送器中协调ATP水解和基质运输的精确机制在很大程度上是未知的.
研究的目的:
- 为了阐明在IV型ABC运输器中ATP水解和基质运输之间的功能协调.
- 确定参与NBD和TMD之间信号传导的关键分子组件.
主要方法:
- 在IV型细菌MDR载体BmrA.中保存的残留集群的局部定向突变发生.
- 功能性测试以评估运输活动和ATP水解.
- 核磁共振 (NMR) 光谱学. 核磁共振 (NMR) 光谱学. 核磁共振 (NMR) 光谱学. 核磁共振 (NMR) 光谱学.
- -交换质谱法 (HDX-MS). 交换质谱法 (HDX-MS). 交换质谱法 (HDX-MS). 交换质谱法 (HDX-MS). 交换质谱法 (HDX-MS). 交换质谱法 (HDX-MS). 交换质谱法 (HDX-MS). 交换质谱法.
- 照片诱导的电子转移光相关谱学 (PET-FCS).
主要成果:
- 在BmrA.中,在NBD/TMD接口的保存残留集群中,以W413为中心,被确定为BmrA.
- 转变W413从运输活动中脱离ATP水解,表明其关键作用.
- 已识别的集群作为双向通信链,通过合螺旋2在NBD和TMD之间传输信号.
- 基突变被证明会影响本地和全球蛋白质动力学,从而影响传递器活性.
结论:
- 这项研究揭示了一种新的全性通路,该通路对于多域ABC传送器中的功能合至关重要.
- 识别的通信链对于协调ATP水解与基质转位至关重要.
- 这些发现为广泛类型的基本膜载体的作用机制提供了基本的见解.
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