AUP1 调节NKCC2的内细胞网膜相关降解和多基化
Nadia Frachon1,2, Sylvie Demaretz1,2, Elie Seaayfan1,2
1Centre de Recherche des Cordeliers, INSERM, Sorbonne Université, Université de Paris, F-75006 Paris, France.
Cells
|March 13, 2024
概括
古代无处不在的蛋白1 (AUP1) 与脏NKCC2相互作用,通过ERAD途径增强其降解. 这一发现为产前巴特特综合征1型提供了潜在的治疗点.
科学领域:
- 腎臟病學 (nephrology) 是一種醫學.
- 分子生物学分子生物学
- 细胞生物学 细胞生物学
背景情况:
- 脏Na-K-2Cl共运输体NKCC2中的失活突变会导致产前巴特综合征 (BS) 1型,一种严重的失去盐的管状病变.
- 以前的研究将BS类型1与内分泌网膜相关降解 (ERAD) 途径联系起来.
研究的目的:
- 为了进一步描述参与NKCC2监管的ERAD机器.
- 在ERAD途径中识别NKCC2的新型相互作用体和调节体.
主要方法:
- 同免疫沉用于识别NKCC2相互作用体.
- 西方涂抹以评估蛋白质水平和无处不在.
- 细胞测试以评估蛋白质降解和ER保留.
- 使用蛋白酶和曼诺酶抑制剂 (MG132,基恩辛).
- 基因沉默 (敲击) 和主导负的方法来抑制AUP1功能.
主要成果:
- 古代无处不在的蛋白1 (AUP1) 被确定为ER居民NKCC2.2的新型相互作用者.
- AUP1增强了NKCC2的多基化和与ER相关的降解,类似于OS9.
- AUP1的共同表达降低了总NKCC2蛋白水平,这种效应被ERAD抑制剂消除了.
- 抑制AUP1会增加NKCC2蛋白水平,并降低其多比基化.
- 此外,AUP1还与相关的共载体NCC.相互作用并降低其调节.
- 在NKCC2折叠突变体上,AUP1的影响更为明显.
结论:
- 一个新的AUP1-介导的途径增强NKCC2的多基化和ERAD.
- AUP1作为对依赖的化物携带体的共同调节剂,包括NKCC2和NCC.
- 针对特定的ERAD组件,如AUP1,可能为产前巴特特综合征1型提供治疗策略.
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