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螺旋检查点的要求,在芽酵母中进行适当的染色体分离
M A Shonn1, R McCarroll, A W Murray
1Department of Biochemistry and Department of Physiology, University of California, San Francisco, CA 94143-0444, USA.
Science (New York, N.Y.)
|July 15, 2000
概括
旋转检查点确保了准确的染色体分离在半变化过程中. 在这个检查点的缺陷,特别是在半分裂I,增加染色体错分离,可能有助于像唐氏综合征这样的疾病.
科学领域:
- 细胞生物学 细胞生物学
- 遗传学 是一个遗传学.
- 分子生物学分子生物学
背景情况:
- 螺旋检查点对于防止细胞分裂期间发生质积分至关重要.
- 介质变化涉及两轮的分裂,在介质变化I中存在独特的分离挑战.
研究的目的:
- 为了研究螺旋检查点在化I和II染色体分离中的作用,在芽酵母.
- 为了确定影响染色体分离错误的因素,在缺少螺旋检查点功能的情况下.
主要方法:
- 在芽酵母中对螺旋检查点突变的表征.
- 介质分裂I和介质分裂II染色体分离精度的分析.
- 检查重组缺陷突变体 (spo11Δ) 检查点反应的研究.
主要成果:
- 染色体错误分离在介质分裂I增加与染色体长度在检查点突变.
- 延迟阿纳相发作阻止了螺旋检查点突变体中的非离合.
- 螺旋检查点对染色体连接到微管没有紧张而做出反应,如在spo11Δ突变体中所见.
结论:
- 螺旋检查点缺陷不成比例地影响了与变II相比,变I的准确性.
- 这些发现表明,轴心检查点功能障碍与诸如唐氏综合征之类的状状况之间存在潜在的联系.
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