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A preliminary study on mechanisms of fission yeast Dnt1 participating in accurate chromosome segregation and efficient G2/M transition

Abstract

在裂殖酵母中,Dnt1主要定位在核仁里,在有丝分裂后期还定位在纺锤体上。本实验室之前的研究发现,Dnt1对于纺锤体检验点的沉默是必需的;另外Dnt1通过下调Wee1蛋白水平调控细胞G2/M转换以及胞质分裂。 本研究通过对染色体分离情况的精确观察,我们发现Dnt1与Monopolin蛋白(Pcs1/Mde4)、AuroraB激酶Ark1分别通过不同途径防止姊妹染色体的merotelicorientation,在染色体准确分离过程中起着重要作用。利用nda3-KM311cdc13-GFPark1-as3纺锤体检验点沉默筛选系统,我们进一步确认Dnt1与SAC的关键组分Bub3在不同的通路上调控检...In the fission yeast Schizosaccharomyces pombe, Dnt1 mainly localizes in the nucleolus, and it also appear on the spindle at anaphase. Our previous studies found that Dnt1 positively regulates G2/M transition and cytokinesis by down-regulating protein levels of Wee1 kinase, Dnt1 is also required for the spindle checkpoint silencing. In this study, by observing chromosome segregation defects duri...学位:理学硕士院系专业:生命科学学院_细胞生物学学号:2162013115252

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