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Updated: Jul 16, 2026

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Spatiotemporal Analysis of Cytokinetic Events in Fission Yeast
Published on: February 20, 2017
酵母中的内细胞分裂:证据表明,一个小的GTP结合蛋白 (Ypt7p) 的参与
H Wichmann1, L Hengst, D Gallwitz
1Max Planck Institute for Biophysical Chemistry, Department of Molecular Genetics, Germany.
Cell
|December 24, 1992
概括
酵母中的YPT7基因编码了一种GTP结合蛋白,这对真空蛋白质运输至关重要. 它的缺失导致碎片化的真空孔和受损的激素降解,这表明它在内体运输中发挥了作用.
科学领域:
- 分子生物学分子生物学
- 细胞生物学 细胞生物学
- 酵母遗传学 酵母遗传学
背景情况:
- 拉斯相关蛋白质的Ypt家族参与细胞内运输.
- 拉布7是Ypt蛋白的哺乳动物同类物,涉及到内体体贩运.
研究的目的:
- 来自Saccharomyces cerevisiae的YPT7基因的克隆和特征.
- 研究Ypt7蛋白在酵母细胞过程中的功能,特别是真空传输.
主要方法:
- 在S. cerevisiae中基因克隆和破坏.
- 对真空分子形态和蛋白质运输的分析.
- 对α因子费洛蒙吸收和降解的测定.
主要成果:
- 克隆的YPT7基因编码了208个氨基酸GTP结合蛋白,与哺乳动物Rab7.7相同.
- YPT7基因的破坏没有影响细胞生长,但导致了碎片化的真空孔.
- 突变者在真空蛋白质成熟中表现出缺陷,并严重抑制了内细胞化费洛蒙的降解.
结论:
- Ypt7p在酵母体内类似内分泌体的区间之间的蛋白质运输中发挥着重要作用.
- 这些发现突显了Ypt/Rab蛋白在膀性贩运通路中的保存功能.
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