【摘要】 WEB2基因编码产物为一种DNA解链酶。WEB2突变株经hydroxyurea阻断DNA合成后,经流式细胞仪检测DNA含量、纺锤体微管间接免疫 荧光染色及存活率测定,结果显示WEB2突变株表现S期检查点缺失。推测WEB2除了具有解链酶作用外,还参与酿酒酵母S期检查点调控机制,位于已建立的S期检查点信号传导通路模型上。本研究有助于加深对真核细胞检查点调控的了解,为研究肿瘤的发生机制提供线索。更多还原

【Abstract】 WEB2 gene encodes a DNA helicase. A WEB2 mutant was treated with Hydroxyurea. Facs analysis, spindle microtubule staining by indirect immunofluorescence and % survial indicate that the mutant is defect in S phase checkpoint. We propose that WEB2 has not only helicase activity, but a role in S phase checkpoint regulation. And WEB2 gene locates in S phase checkpoint signal transduction pathway in S. cerevisiae. The study should shed light on eukaryotic cell checkpoint regulation and the origin of cancer.更多还原