来自Drosophila的一种进化保存的环素同类物拯救了缺乏G1环素的酵母
1Department of Biochemistry and Biophysics, University of California, San Francisco 94143.
Cell
|September 20, 1991
概括
研究人员确定了两个可恢复酵母细胞循环功能的多索菲拉基因. 一个基因是cdc2基因的同类基因,另一个基因是新型的环林C蛋白,影响酵母细胞大小.
科学领域:
- * 分子生物学 * 分子生物学
- * 遗传学 遗传学 是一个
- * 细胞循环调节 * 细胞循环调节
背景情况:
- *细胞循环是真核细胞的一个基本过程,由循环素和循环素依赖激酶 (CDK) 调节.
- 由于其保存的遗传通路,Saccharomyces cerevisiae (酵母菌) 作为研究细胞循环控制的模型生物.
- * Drosophila melanogaster (果) 与酵母具有显著的遗传同源性,使其成为比较研究的宝贵工具.
研究的目的:
- * 识别和描述参与细胞循环调节的多索菲拉基因.
- * 为了研究新型Drosophilacyclin家族成员的功能.
- * 探索旋内的进化保护区域及其与其他瘤基因的潜在同质性.
主要方法:
- * Drosophila cDNA克隆的分离和表征.
- * 在缺乏CLN功能的Saccharomyces cerevisiae中进行功能救援实验.
- * 序列同质性分析和循环蛋白中保存区域的比较.
主要成果:
- * 隔离了两个DrosophilacDNA克隆,这些克隆可以拯救缺乏CLN功能的酵母.
- * 一个克隆被确定为cdc2基因的Drosophila同类.
- *第二个克隆编码了一种新型的环林C蛋白,与人类对应物高度同源,当过度表达时会诱导异常小的酵母细胞大小.
结论:
- * Drosophila 具有像 cdc2.2 这样的关键细胞循环调节者的同类.
- *发现了一种新型的Drosophila cyclin C,在酵母中功能性保存,并影响细胞大小.
- * 旋中保存的区域表明了与ras瘤基因的进化联系和潜在的同质性.
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