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Valerie Ann Perez¹, David W Sanders¹, Ayde Mendoza-Oliva¹

¹Center for Alzheimer's and Neurodegenerative Diseases, Peter O'Donnell Jr. Brain Institute, University of Texas Southwestern Medical Center, Dallas, United States.

|June 30, 2023

概括

J域蛋白DnaJC7特别结合tau,防止神经退行性疾病中的有毒蛋白质聚合. 它的J域对刺激Hsp70活动至关重要,突出了病调节的关键机制.

科学领域:

神经生物学神经生物学神经生物学
分子生物学分子生物学
蛋白质生物化学蛋白质生物化学

背景情况:

神经退行性陶病是由于有毒的陶蛋白积累而产生的.
像Hsp70s和J域蛋白 (JDPs) 这样的伴侣蛋白调节蛋白质折叠,包括tau.
参与协调tau折叠和聚合的具体JDP在很大程度上是未知的.

研究的目的:

研究JDPs在调节细胞内聚的作用.
为了确定DnaJC7与tau的相互作用是特定的还是其他JDP共享的.
阐明DnaJC7抑制陶聚合的机制.

主要方法:

在细胞模型中进行蛋白质组学分析,以识别与相互作用的蛋白质.
细胞测试以评估JDP淘汰对tau聚合和播种的影响.
位点定向突变发生,以评估DnaJC7的J域和基质结合位点的功能重要性.

主要成果:

发现DnaJC7与不溶性合物共同净化,并与合物同位化.
淘汰DnaJC7导致总体清除降低,细胞内种植增加.
在DnaJC7的J域或基质结合部位的突变取消了其对tau聚合的保护功能.

结论:

DnaJC7 通过与 Hsp70.0 的合作,专门调节 tau 聚合.
DnaJC7的J域对于刺激Hsp70 ATPase活性至关重要,这对其抗聚合功能至关重要.
与疾病相关的DnaJC7突变损害了它调节陶聚合的能力,这表明它是一个潜在的治疗标.

关键词:

在 DnaJC7 中使用.J域蛋白质是J域蛋白质的组成部分.氨基化物氨基化物生物化学生物化学陪伴者 (chaperones) 是指一个陪伴者.化学生物学化学生物学人类人类人类人类人类人类人类神经科学神经科学播种播种播种播种知道的知道的知道的

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