净化了一种新型类型的涂层囊泡,通过戈尔吉堆调解生物合成蛋白质的运输
V Malhotra1, T Serafini, L Orci
1Department of Biology Princeton University, New Jersey 08544.
Cell
|July 28, 1989
概括
研究人员净化了参与蛋白质运输的新型戈尔吉衍生涂层囊泡. 这些囊泡与涂有克拉的囊泡不同,它们是使用一种新方案分离出来的,该方案涉及ATP,细胞醇和GTP gamma S.
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:
- 非克拉特林涂层的囊泡介导了Golgi水箱之间的蛋白质运输,并可能从ER到Golgi.
- 了解这些囊泡的组成和功能对于阐明细胞内贩运途径至关重要.
研究的目的:
- 开发和描述一套用于参与戈尔吉运输的非克拉涂层囊泡的净化方案.
- 为了描述这些净化的囊泡的聚化合物组成.
主要方法:
- 在GTP gamma S的存在下用ATP和细胞醇化戈尔吉膜,以积累囊泡.
- 使用高度盐从戈尔吉水箱中分离涂层囊泡.
- 通过差异和密度梯度离心净化戈尔吉衍生的涂层囊泡.
主要成果:
- 建立了一种方法来净化Golgi衍生的涂层囊泡.
- 这些囊泡在特定条件下 (ATP,细胞醇,GTP gamma S) 积聚,从而抑制囊泡融合.
- 与细胞质,戈尔吉膜和克拉涂层囊泡相比,纯化的囊泡表现出明显的聚化合物组成.
结论:
- 描述的方案有效地净化了Golgi衍生的涂层囊泡.
- 这些囊泡代表着一个独特的群体,参与Golgi内部和潜在的ER-to-Golgi运输.
- 它们独特的多签名表明它们在蛋白质贩运中扮演了专门的角色.
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