人类花朵异型hFWE3和hFWE4的膜结构和内化动态表明hFWE4的内细胞作用得到保护
Justin C Rudd1, Sibaprasad Maity1, James A Grunkemeyer1
1Department of Biomedical Sciences, Creighton University School of Medicine, Omaha, Nebraska, USA.
The Journal of biological chemistry
|June 22, 2023
概括
人类花 (hFWE) 蛋白对于细胞竞争至关重要. 这项研究揭示了hFWE3和hFWE4的结构和动态,显示了hFWE4
科学领域:
- 细胞生物学 细胞生物学
- 分子和结构生物学 分子和结构生物学
- 蛋白质贩运和蛋白质的动力学
背景情况:
- 人类花 (hFWE) 异型 (hFWE1-4) 是涉及细胞竞争的跨膜蛋白.
- 它们的功能依赖于C端尾的细胞外表,但它们的结构和定位尚不清楚.
- 关于正统的FWE蛋白质结构存在差异,对人类异形体的实验数据不存在.
研究的目的:
- 确定人类FWE3和hFWE4.4的结构,亚细胞局部化和内部化动态.
- 为这些关键异构体的膜拓和功能机制提供实验证据.
主要方法:
- 利用AlphaFold2和分子动力学来进行表位标记hFWE3和hFWE4.4的结构预测.
- 采用各种成像技术来分析亚细胞定位和膜呈现.
- 使用AP-2和dynamin-1依赖性试验研究了内部化途径.
主要成果:
- hFWE3定位在细胞内核中的N-和C-终端尾巴的内质网膜 (ER) 膜上.
- hFWE4显示了与血和内细胞囊泡 (Rab4,Rab5,Rab11) 的部分同位化.
- hFWE4在细胞表面短暂存在,并通过依赖AP-2和dynamin-1的途径快速内化.
结论:
- 这项研究阐明了hFWE3和hFWE4.4的独特亚细胞定位和膜拓.
- hFWE4的短暂细胞表面存在和快速内化表明它在内细胞过程中起作用.
- 这些发现有助于理解hFWE蛋白在细胞通信和动态中的保存功能.
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