对于Wntless从内分体到Golgi的逆向贩运,需要EYA蛋白质复合体
Hilal Ahmad Reshi1, Raghavender Medishetti2, Aishwarya Ahuja3
1Laboratory of Cell Death & Cell Survival, Centre for DNA Fingerprinting and Diagnostics (CDFD), Uppal, Hyderabad 500039, India; Graduate Studies, Regional Centre for Biotechnology, Faridabad 121001, India.
Developmental cell
|June 13, 2024
概括
眼睛缺失 (EYA) 蛋白和SCAMP3对于Wntless (WLS) 从内分泌体到跨戈尔吉网络 (TGN) 的逆向传输至关重要,确保Wnt分泌. 这一途径对发育至关重要,并与听力损失突变有关.
科学领域:
- 细胞生物学 细胞生物学
- 分子生物学分子生物学
- 发展生物学 发展生物学
背景情况:
- 从内分体到跨戈尔吉网络 (TGN) 的 Wntless (WLS) 的逆向传输对于 Wnt 在发育过程中的分泌是必不可少的.
- 控制WLS逆行贩运的分子机制仍然不完全理解.
研究的目的:
- 确定参与WLS向TGN逆行运输的新型分子参与者.
- 阐明眼睛缺席 (EYA) 蛋白和SCAMP3在WLS贩运和Wnt分泌中的作用.
主要方法:
- 利用人类细胞系进行分子分析.
- 雇用了包括C. elegans,Drosophila melanogaster和斑马鱼在内的模型生物来研究进化保护.
- 研究了蛋白质复合体的形成,蛋白质-蛋白质相互作用和细胞贩运途径.
主要成果:
- 鉴定出眼睛缺失 (EYA) 蛋白质作为人类细胞中WLS逆向转运到TGN的关键调节者.
- 证明了EYA-分泌载体关联膜蛋白3 (SCAMP3) 轴在脊椎动物中得到保护.
- 表明EYAs在早期内分泌体上与逆转激素形成复合体,并招募SCAMP3,这对内分泌体-TGN融合至关重要.
- 观察到EYA或SCAMP3的损失会影响WLS运输和Wnt分泌.
- 发现与听力损失相关的EYA突变破坏了EYA-逆转蛋白复合体的形成和Wnt信号激活.
结论:
- EYA复合体是WLS从内分泌体到TGN的逆向贩运途径的一个新组成部分.
- EYA-SCAMP3轴在Wnt分泌中发挥着保留和必不可少的作用.
- 功能障碍的EYA复合体会影响Wnt信号,并与听力损失的发病有关.
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