S. pombe基因sds22+对于中位转变至关重要,它编码了一种富含白的重复蛋白,可积极调节蛋白质酸酶-1蛋白
1Department of Biophysics, Faculty of Science, Kyoto University, Japan.
Cell
|January 11, 1991
概括
一个新的基因,sds22+,对于裂变酵母的细胞分裂周期至关重要,特别是从元相过渡到异相. 它增强了蛋白酸酶1 (PP1) 的活性,但当PP1水平高时,它是不可缺少的.
科学领域:
- 细胞生物学 细胞生物学
- 分子生物学分子生物学
- 遗传学 是一个遗传学.
背景情况:
- 裂变酵母具有两种1型蛋白酸酶 (PP1).
- dis2+基因编码了一个PP1,其突变基因dis2-11在线粒分裂中有缺陷.
- 分解需要精确调节蛋白质脱化.
研究的目的:
- 描述一个高剂量抑制剂,sds22+,它补充了dis2-11突变.
- 研究sds22+在线粒分裂中的功能及其与PP1的关系.
- 确定sds22+蛋白的结构和功能性质.
主要方法:
- 基因克隆和sds22+的基因测序.
- 基因分析包括基因破坏和高剂量补充.
- 生物化学分化以确定蛋白质定位.
- 对野生型和突变菌株细胞周期进展的分析.
主要成果:
- sds22+编码了一种新型的30kd蛋白,富含白氨酸的重复,局部存在于不溶性核部分.
- sds22+对于基相/亚相过渡至关重要,其破坏会导致线粒体的停止.
- 高剂量的PP1基因抑制sds22+无表型,表明功能相互作用.
- sds22+产品增强了PP1依赖的脱化,但并没有取代PP1的功能.
结论:
- sds22+ 是一个必需的基因,在裂变酵母中需要进行线粒性进展.
- sds22+蛋白可能作为PP1的调节子单元或辅因子,增强其活性.
- sds22+ 促进了PP1依赖性去化事件在中期线粒分裂期间.
相关概念视频
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