来自Drosophila RNA聚合酶II位点的序列的分子克隆,通过P元素转位子标记进行P元素标记
Cell
|December 1, 1982
概括
研究人员在Drosophila melanogasterRNA聚合酶II中发现了由P元素插入引起的致命突变. 这一发现为克隆Drosophila中的特定基因提供了一种新方法.
科学领域:
- 分子生物学分子生物学
- 遗传学 遗传学 是一个
- 发展生物学 发展生物学
背景情况:
- 在Drosophila melanogaster中的RNA聚合酶II位点 (RpIIC4) 对于基因转录至关重要.
- 可转移的元素,如P元素,可以通过插入基因引起突变.
- 混合失生是一种与P元素活动相关的Drosophila中的现象.
研究的目的:
- 为了确定DrosophilaRNA聚合酶II位点中致命突变的遗传原因.
- 开发一种使用P元素插入克隆基因定义位点的新方法.
主要方法:
- 从RpII位点分离出一个含有P元素插入和侧面基因组DNA的兰巴菌体克隆.
- 混合P元素序列以确定插入和侧面区域.
- 分析聚烯染色体以确定突变的细胞遗传位置.
- 新的P元素插入的生成和反剂的分析.
主要成果:
- 在RpIIC4位点中发现了一种致命的突变,与P元素插入有关.
- 在RpII位点的10kB基因组DNA片段中发现了一个1.3kB的P元素插入.
- 非P序列杂交到聚烯染色体带10C,这是RPIIC4.4已知的位置.
- 致命突变的逆转者也显示出P元素序列在位点上的损失.
- 在位点内确定了多个P元素插入点.
结论:
- 插入P元素是DrosophilaRNA聚合酶II位点中致命突变的原因.
- 克隆Drosophila中的基因定义位置可以通过P元素突变和检索侧边DNA序列来实现.
- 这种方法为基因克隆和Drosophila的遗传分析提供了一个强大的工具.
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