酵母杆杆体的不对称的线粒分离
E A Vallen1, T Y Scherson, T Roberts
1Department of Molecular Biology, Lewis Thomas Laboratory, Princeton, New Jersey 08544-1014.
Cell
|May 1, 1992
概括
KAR1基因对酵母螺旋杆体 (SPB) 复制和核聚变至关重要. KAR1-β-galactosidase杂交物定位在SPB中,特定的区域决定了SPB和核外协会.
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:
- 酵母中的KAR1基因对于螺旋杆体 (SPB) 复制和核聚变过程至关重要.
- 了解KAR1的功能需要研究其细胞内的局部和相互作用.
- SPB重复是细胞周期中的一个关键事件,确保了适当的染色体分离.
研究的目的:
- 为了确定酵母细胞内KAR1蛋白的局部.
- 确定KAR1负责其定位到SPB和核包裹的特定区域.
- 阐明KAR1在SPB重复和核聚变中的作用.
主要方法:
- 构建和分析KAR1-β-galactosidase杂交蛋白质.
- 野生类型和突变酵母菌株 (ndc1) 中混合蛋白的微观局部化研究.
- 参与本地化和SPB重复的KAR1域的功能分析.
主要成果:
- KAR1-β-银酸酶混合体定位在SPB的外表上.
- 复制后,混合蛋白只与一个SPB结合,通常是进入芽的SPB.
- 在ndc1突变中,杂交只局限于"新"SPB.
- 确定了KAR1的两个不同的区域:一个用于SPB定位,另一个用于核包裹准.
- 这些本地化域与SPB重复所必需的功能域相关.
结论:
- KAR1 固定在核外上.
- 在细胞周期期间,KAR1可能与其他SPB成分相互作用.
- 已识别的本地化域对于KAR1在SPB重复中的作用至关重要.
相关概念视频
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02:27The Mitotic Spindle
The mitotic spindle—or spindle apparatus—is a eukaryotic, cytoskeletal structure made up of long protein fibers called microtubules. Formed during cell division, the spindle separates sister chromatids and moves them to opposite ends of a parental cell, where the now individual chromosomes are distributed to two daughter cell nuclei.
The bipolar configuration of the mitotic spindle facilitates chromosomal segregation, preparing the cell for division. One mechanism that ensures bipolar mitotic...
The bipolar configuration of the mitotic spindle facilitates chromosomal segregation, preparing the cell for division. One mechanism that ensures bipolar mitotic...
02:19The Spindle Assembly Checkpoint
The spindle assembly checkpoint is a molecular surveillance mechanism ensuring the fidelity of chromosome segregation during anaphase. The checkpoint monitors the completion of all the prerequisite steps before chromosome segregation to determine whether the segregation process should proceed or be delayed.
Many proteins function together to control the spindle assembly checkpoint. Mutations affecting these proteins may allow cells to proceed into anaphase prematurely, resulting in the...
Many proteins function together to control the spindle assembly checkpoint. Mutations affecting these proteins may allow cells to proceed into anaphase prematurely, resulting in the...