中文摘要
泛素-蛋白酶体通路和细胞凋亡对生命活动极其重要,它们的异常会导致癌症、心血管疾病、神经退行性疾病等人类重大疾病。在本项目的研究过程中,1) 我们发现新的蛋白酶体亚单位hRpn13可促进蛋白酶体中的去泛素化酶UCH37的去泛素化活性,从而调节蛋白酶体对细胞内底物蛋白质的降解。同时,我们发现干扰hRpn13的正常功能可导致细胞凋亡。这些结果已以通讯作者发表于EMBO J。2)发现泛素连接酶Nrdp1不仅可促进细胞凋亡,而且参与细胞周期的调控(已投稿)。3)发现Nrdp1的相互作用蛋白NIP可在细胞凋亡启动时与Nrdp1形成复合物。利用NIP基因敲除的小鼠细胞发现NIP为Nrdp1介导其底物降解所必需(撰写中)。4) 发现在睾丸中存在特异亚基组成和活性的蛋白酶体新类型; 发现一个新的、精子和精细胞特有的蛋白酶体亚单位(撰写中)。5) 参与发现调节蛋白质降解或细胞凋亡的新机制,结果发表在Mol Cell等4个重要国际刊物。6)在国际刊物发表两篇特邀综述。7)主持编写了专著《泛素介导的蛋白质降解》。8)参与组织国际会议一次。上述成果对于研究泛素-蛋白酶体通路及其调控细胞凋亡的机理具有重要意义。
英文摘要
The ubiquitin-proteasome pathway and apoptosis are critical to life, and their dysfunction would lead to severe human diseases, such as cancer, cardiovascular disorders, and neurodegenerative diseases. In this project, (1) we discovered that the new proteasome subunit, hRpn13, regulated the degradation of cellular proteins by promoting deubiquitinating activity of UCH37. Meanwhile, we showed that interference of the function of hRpn13 led to apoptosis. These results were published in EMBO J. (2006), where the PI was a corresponding author. (2) Demonstrated that Nrdp1 regulated cell cycle progression in addition to promoting apoptosis (manuscript submitted). (3) Showed that the Nrdp1-interacting protein (NIP) might complex with Nrdp1 during the initiation of apoptosis and was required for degradation of the substrates of Nrdp1 by using mouse NIP-deficient cells (manuscript in preparation). (4) Discovered two novel types of proteasomes in mammalian testes,which were composed of distinct subunits and possessed distinct proteolytic activities, and discovered a novel sperm- and spermatid-specific proteasomal subunit (manuscript in preparation). (5) Participated in the multiple studies that led to improved understanding of proteolysis and apoptosis, and the results for these studies were published (Tcherpakov et al
结题摘要
泛素-蛋白酶体通路和细胞凋亡对生命活动极其重要,它们的异常会导致癌症、心血管疾病、神经退行性疾病等人类重大疾病。在本项目的研究过程中,1) 我们发现新的蛋白酶体亚单位hRpn13可促进蛋白酶体中的去泛素化酶UCH37的去泛素化活性,从而调节蛋白酶体对细胞内底物蛋白质的降解。同时,我们发现干扰hRpn13的正常功能可导致细胞凋亡。这些结果已以通讯作者发表于EMBO J。2)发现泛素连接酶Nrdp1不仅可促进细胞凋亡,而且参与细胞周期的调控(已投稿)。3)发现Nrdp1的相互作用蛋白NIP可在细胞凋亡启动时与Nrdp1形成复合物。利用NIP基因敲除的小鼠细胞发现NIP为Nrdp1介导其底物降解所必需(撰写中)。4) 发现在睾丸中存在特异亚基组成和活性的蛋白酶体新类型; 发现一个新的、精子和精细胞特有的蛋白酶体亚单位(撰写中)。5) 参与发现调节蛋白质降解或细胞凋亡的新机制,结果发表在Mol Cell等4个重要国际刊物。6)在国际刊物发表两篇特邀综述。7)主持编写了专著《泛素介导的蛋白质降解》。8)参与组织国际会议一次。上述成果对于研究泛素-蛋白酶体通路及其调控细胞凋亡的机理具有重要意义。
