SEC-10的C端域对外囊功能,顶端组织和细胞形态发生在Neurospora crassa中至关重要
Alfredo Figueroa-Meléndez1, Mónica E Cante-Paz1, Diego L Delgado-Álvarez1
1Department of Microbiology, Centro de Investigación Científica y de Educación Superior de Ensenada (CICESE), Ensenada, BC 22860, Mexico.
Molecular biology of the cell
|July 9, 2025
概括
这是一种SEC-10蛋白质.
科学领域:
- 细胞生物学 细胞生物学
- 菌类学 菌类学是指菌类学.
- 分子生物学分子生物学
背景情况:
- 外囊复合体对于真核细胞中囊泡分泌至关重要.
- 在 *Neurospora crassa* 中,顶端生长依赖于 Spitzenkörper (SPK) 进行分泌囊泡积累和与血膜 (PM) 融合.
- 外囊子单元SEC-10的定位以前是未知的.
研究的目的:
- 为了研究SEC-10在Neurospora crassa中的定位和功能.
- 确定SEC-10的N和C末端在外囊复合体组装和功能中的作用.
- 阐明SEC-10对形形态发生和极性的贡献.
主要方法:
- 绿色光蛋白 (GFP) 在N和C末端标记内源性SEC-10.
- 纳米解卷显微镜用于可视化外细胞部位.
- 一个 *sec-10* 淘汰突变的生成和分析.
- 质谱测量以评估外囊子单元相互作用.
- 对SEC-10进行序列分析.
主要成果:
- SEC-10的N端GFP标记保留了外囊功能,而C端标记导致了严重的生长和极性缺陷.
- 一种*sec-10*的淘汰突变是不可行的,证实了SEC-10在状体形态发生过程中的重要作用.
- 质谱学揭示了减少的外囊子单元相互作用与C端标记的SEC-10,表明复合组件受损.
- SEC-10的C端区域包含一个保存的,灵活的富含甘氨酸的循环.
结论:
- SEC-10 C-终端对于外囊的组装,稳定性和功能至关重要.
- 无障碍的SEC-10 C端对于外囊介导的囊泡结合和在等离子膜的融合是不可或缺的.
- SEC-10在调节 *Neurospora crassa* 中叶尖生长和极性方面发挥着至关重要的作用.
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