HRD1通过抑制SNAP29的液体-液体相分离来负面调节自溶酶体的形成
Wenyan Qu1, Di Chen2, Hongyu Zhao2
1School of Basic Medical Sciences and Biopharmaceutical Research Institute, Anhui Medical University, Hefei 230032, Anhui, P.R. China; Anhui Provincial Key Laboratory for Brain Bank Construction and Resource Utilization, Anhui Medical University, Hefei 230032, Anhui, P.R. China.
Cell reports
|January 30, 2026
概括
E3 泛基因酶 HRD1 通过控制 SNAP29 液态液态相分离 (LLPS) 来负面调节自溶酶体的形成. 缺少HRD1可以通过SNAP29凝聚和SNARE复合组合来增强自和自解酶体生物发生.
科学领域:
- 细胞生物学 细胞生物学
- 分子生物学分子生物学
- 生物化学 生物化学
背景情况:
- 自是一种关键的细胞过程,通过自溶酶体降解细胞质成分.
- 虽然SNARE蛋白调解了自解酶体生物发生,但其调节机制尚未完全理解.
- 了解这些调节剂是理解细胞平衡和疾病的关键.
研究的目的:
- 为了研究E3无素结合酶HRD1在调节自溶酶体形成中的作用.
- 要确定HRD1是否通过SNAP29.29的液态液态相分离 (LLPS) 调节SNARE组件.
- 阐明HRD1影响自胞体-溶解体融合的分子机制.
主要方法:
- 利用基于细胞的测试来评估HRD1缺乏细胞中的自活动和自解酶体形成.
- 通过共免疫沉和细胞局部化研究,研究了HRD1和SNAP29之间的相互作用.
- 进行了体外和体内实验来分析SNAP29凝结和SNARE复合组合.
- 研究了HRD1耗尽对SNAP29LLPS动态的影响.
主要成果:
- 缺少HRD1显著增强了自和促进了自解酶体的形成,以SNAP29-依赖的方式.
- 发现SNAP29在体外和体内都能形成SNARE复合体组合所必需的动态凝聚物.
- HRD1直接与SNAP29相互作用,并抑制其LLPS.
- HRD1的耗尽导致了加速的SNAP29凝结物形成和增强的SNARE复合体组装.
结论:
- HRD1的功能是作为自解酶体形成的负调节者.
- HRD1通过抑制SNAP29.9的液体-液体相分离 (LLPS) 来抑制自溶酶体生物发生.
- 通过HRD1对SNAP29 LLPS的这种调节调节了SNARE复合组合和自细胞-溶酶体融合效率.
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