一个蛋白质组装-拆卸途径在体外,这可能与突触囊泡对接,激活和融合的连续步骤相对应
T Söllner1, M K Bennett, S W Whiteheart
1Program in Cellular Biochemistry and Biophysics, Memorial Sloan-Kettering Cancer Center, New York, New York 10021.
Cell
|November 5, 1993
概括
可溶性NSF附着蛋白 (SNAP) 受体 (SNAREs) 介导囊泡融合. 这项研究表明,SNAREs与synaptotagmin形成一个稳定的复合体,该复合体被α-SNAP所取代,调节融合.
科学领域:
- 细胞生物学 细胞生物学
- 分子生物学分子生物学
- 神经科学是一个神经科学.
背景情况:
- 该SNARE假设描述了由SNARE蛋白调解的囊泡融合.
- 合成素,SNAP-25 (t-SNARE) 和VAMP (v-SNARE) 是参与膜融合的关键SNARE.
- 这些SNARE与SNAP和NSF组装成20S聚变粒子.
研究的目的:
- 调查在没有NSF的情况下SNARE,synaptotagmin和alpha-SNAP的作用.
- 阐明SNARE复合体形成和解离的机制.
- 了解在膜融合中突触胺的调节作用.
主要方法:
- 对SNARE复合体形成的生物化学分析.
- 使用结合试验对蛋白质与蛋白质相互作用的研究.
- 对依赖ATP水解的复杂解离的研究.
主要成果:
- 合成素,SNAP-25和VAMP形成了一个独立于SNAP和NSF的稳定复合体.
- 这种SNARE复合体结合了synaptotagmin,它被α-SNAP所取代.
- 阿尔法-SNAP-SNARE复合体与NSF结合,而ATP水解将复合体解离.
结论:
- 交纳普托塔明作为紧剂,在没有信号的情况下防止融合.
- 阿尔法-SNAP与SNARE复合体的结合由NSF和ATP进行调节.
- 依赖NSF的ATP水解可能为双层聚变提供机械力.
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