一种类似于SNARE的蛋白质,是通过戈尔吉综合体运输所需的
D K Banfield1, M J Lewis, H R Pelham
1MRC Laboratory of Molecular Biology, Cambridge, UK.
Nature
|June 29, 1995
概括
研究人员发现了参与分泌途径的新酵母蛋白. 与v-SNARE相似的蛋白质Sft1p对于戈尔吉装置内的运输至关重要,这表明单个t-SNARE可以调节多个步骤.
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:
- 细胞分泌途径涉及连续的膜结合的部分.
- 运输气囊介于这些隔间之间的货物运输.
- 可溶性NSF附着蛋白受体 (SNAREs) 对于囊泡向和融合至关重要.
研究的目的:
- 为了识别在分泌途径内参与囊泡运输的新型蛋白质.
- 为了研究酵母膜蛋白与Sed5p相互作用的功能,一个ER-Golgi t-SNARE.
主要方法:
- 在酵母菌中的基因相互作用研究.
- 蛋白质结构相似性分析.
- 在细胞内运输中识别的蛋白质的功能分析.
主要成果:
- 鉴定出两种酵母膜蛋白与Sed5p.有遗传相互作用.
- 一个已识别的蛋白质Sft1p在结构上与v-SNAREs相似.
- Sft1p对于早期和后期的戈尔吉区间之间的运输至关重要.
结论:
- 一个t-SNARE (Sed5p) 可以调节分泌途径中的多个运输步骤.
- Sft1p是SNARE的候选人,涉及到戈尔吉内运输.
- 这项研究为Golgi贩运的分子机制提供了新的见解.
相关概念视频
Golgi Apparatus
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Once a transport vesicle has recognized its target organelle, the vesicular membrane needs to fuse with the target membrane to unload the cargo. Transmembrane proteins called SNAREs present on organelle membranes and their vesicles, mediate vesicle fusion.
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SNAREs exist in pairs that symmetrically interact and catalyze the fusion of the lipid bilayers in vesicle and target organelle. v-SNARE in the vesicle membrane are single polypeptide chains that bind to a complementary t-SNARE, composed of 2...
Golgi Apparatus
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One of the first identified Golgi matrix proteins was GM130, a rod-like protein located in the cis-Golgi. Subsequently, many Golgi...
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Protein Translocation Machinery on the ER Membrane
The translocon complex situated on the ER membrane is the main gateway for the protein secretory pathway. It facilitates the transport of nascent peptides into the ER lumen and their insertion into the ER membrane.
Sec61 protein conducting channel
In eukaryotes, the translocon complex comprises a core heterotrimeric translocator channel called the Sec61 complex. This channel includes three transmembrane proteins, Sec61α, Sec61β, and Sec61γ, and is the largest subunit of the translocon complex.
Sec61 protein conducting channel
In eukaryotes, the translocon complex comprises a core heterotrimeric translocator channel called the Sec61 complex. This channel includes three transmembrane proteins, Sec61α, Sec61β, and Sec61γ, and is the largest subunit of the translocon complex.
Golgi Apparatus
Properly folded and assembled proteins are selectively packaged into vesicles that exit the ER. Motor proteins transport these vesicles to the Golgi apparatus for adding modifications that make these proteins functional at their destination.
The Golgi apparatus is a eukaryotic organelle that has a distinctive ribbon-like appearance. It is a primary sorting and dispatch station for cargo arriving from the ER. Newly arriving vesicles enter the cis face of the Golgi, closest to the ER, and are...
The Golgi apparatus is a eukaryotic organelle that has a distinctive ribbon-like appearance. It is a primary sorting and dispatch station for cargo arriving from the ER. Newly arriving vesicles enter the cis face of the Golgi, closest to the ER, and are...


