在混乱区域的突变可以通过创建dieleucine动机引起疾病
Katrina Meyer1, Marieluise Kirchner1, Bora Uyar2
1Proteome Dynamics, Max Delbrück Center for Molecular Medicine in the Helmholtz Association (MDC), Robert-Rössle-Str. 10, 13125 Berlin, Germany.
Cell
|September 11, 2018
概括
内在无序区域 (IDR) 的突变可以通过增加克拉结合引起疾病,从而导致蛋白质错位. 这项研究确定了获得的氨酸基因作为驱动这些"氨酸病变"的关键机制.
科学领域:
- 分子生物学
- 遗传学
- 细胞生物学
背景情况:
- 本质上无序区域 (IDR) 的错觉突变与各种疾病有关,但它们的致病机制尚不清楚.
- 了解IDR突变如何影响蛋白质相互作用对于破译疾病病因至关重要.
研究的目的:
- 通过基于的蛋白质查来研究蛋白质IDR中的突变对蛋白质相互作用的影响.
- 阐明IDR中突变的致病性背后的分子机制,特别是跨膜蛋白.
主要方法:
- 基于的蛋白质查,以确定IDR突变的蛋白质相互作用.
- 使用适应蛋白 (AP) 的体外相互作用测试.
- 细胞错位化研究和敲击实验 (例如,AP-2).
- 在IDR中对引起疾病的变体进行系统分析.
主要成果:
- 在GLUT1,ITPR1和CACNA1H异常细胞区域的突变增加了克拉结合.
- 这些突变产生了氨酸基因, 已知是克拉依赖性贩运的媒介.
- 突变的GLUT1 (SLC2A1) 蛋白错位于细胞内,与AP相互作用.
- 击败AP-2恢复了突变GLUT1的正常局部化和葡萄糖运输.
- 在已知致病变体的跨膜蛋白质中观察到显著的获得dieleucine基因的过度表现.
结论:
- 通过破坏正常的蛋白质流通,在跨膜蛋白的IDR中获得的dieleucine基因可能会引起疾病.
- 这种机制被称之为"脱类病变",解释了以前与各种疾病相关的几种突变的致病性.
- 针对迪勒因中介的克拉依赖性贩运,为迪勒因病提供潜在的治疗策略.
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