项目名称: GSK3β激酶调控SKAP蛋白磷酸化在有丝分裂中的功能研究
项目编号: No.31301121
项目类型: 青年科学基金项目
立项/批准年度: 2014
项目学科: 生物科学
项目作者: 王茜玮
作者单位: 中国科学技术大学
项目金额: 23万元
中文摘要: 在整个细胞复制周期的过程中,有丝分裂起承上起下的作用。如果其出现异常,可导致染色体不稳定性并促进肿瘤的发生和发展。SKAP是新近发现的一个定位于微管正末端的重要有丝分裂调控蛋白,我们已有的结果表明SKAP通过介导微管与动点之间的桥联,调控纺锤体的可塑性,但是其具体的分子机制及其可塑性的动态调控机理仍未完全明了。本项目拟通过一系列先进的技术手段,系统地评估GSK3β激酶调控SKAP蛋白磷酸化在有丝分裂期的功能;我们还将利用生物光子学探针的方法阐明GSK3β激酶活性在细胞周期进程中的时空动力学特征及其生理意义。此外,我们还将评估GSK3β磷酸化是否调节SKAP蛋白在细胞周期中的表达水平。相信本项目的顺利实施将会加深我们对细胞有丝分裂过程的认识,为相关疾病的病因学和可能的临床干预途径提供科学依据。
中文关键词: GSK3β;磷酸化;SKAP;IQGAP1;细胞迁移
英文摘要: Mitosis is the most dramatic, as well as critical event in the cell cycle. Errors in this process can lead to aneuploidy or genetic instability, fostering cell death or tumor development. SKAP is a newly defined microtubule plus end protein,our previous work showed that SKAP forms a link between kinetochore core complex KMN and dynamic spindle microtubules, and our studies indicated that SKAP represents an important function in regulating spindle plasticity. However, it still remains elusive as how is the mechanism underlying spatiotemporal regulation of SKAP. Using the combination of a series of newest technology,we aim to answer how GSK3β kinase regulate the function of SKAP during mitosis. And we will using a fluorescence resonance energy transfer-based reporter to exam the temporal dynamics of protein phosphorylation by GSK3βkinase during the whole cell cycle. In addition, we will evaluate whether phosphorylation regulates the expression level of SKAP during cell cycle. Taken together, we hope that the smooth implementation of the project will deepen our understanding of mitosis, and provide the scientific basis for disease etiology and possible clinical intervention approaches.
英文关键词: GSK3β;phosphorylation;SKAP;IQGAP1;cell migration