报告时间:2016年10月9日(星期日)上午10:15-12:00
报告地点:能源楼会议中心二号会议室
报告人:黄超兰 研究员
国家蛋白质科学中心
报告摘要:
T-cell receptor-CD3 complex (TCR) is one of the most versatile signaling machines, which contains in total twelve different phosphorylatable tyrosines from six immunoreceptor tyrosine-based activation motif (ITAM) in the cytoplasmic domains of CD3 chains to orchestrate T cell responses under different stimulations. However, no systematic and absolutely quantitative study has been conducted to investigate the phosphorylation program of the twelve tyrosines. Here, we developed a new Quantitative Reference-Guided Target Mass Spectrometry method to address this question, in which different reference peptide samples and different immunoprecipitated TCR samples from stimulated T cells were labeled by 10*TMT and mixed together. We found that although different tyrosines may be phosphorylated in similar kinetics, they were phosphorylated in distinct amounts by absolute quantification, even two tyrosines from the same ITAM. Different stimulation will also induce totally different phosphorylation program. To study the mechanism under the phosphorylation program, additional biochemistry, structure biology and cell biology assays were performed, and we found that a novel electrostatic interaction between CD3ε and LCK kinase played an important role. This study thus provides a systematic and mechanistic explanation to the versatile TCR signal. Besides, the Quantitative Reference-Guided Target Mass Spectrometry method can be generally applied to all other proteins or complexes.
报告人简介:
黄超兰,研究员,国家蛋白质科学中心,上海(NCPSS)主任助理,质谱系统主任,技术部负责人。具备良好的经验和创新的技术发展的能力和远见,是中心战略规划和人员管理的全方位技能的科学家。
2002年获得香港大学研究院化学系博士学位,2003-2005年在香港大学化学系支志明教授组从事研究助理,2006年成为美国斯克里普斯研究所John Yates教授实验室博士后、实验室主管,后被录用为研究所职位科学家(等同终身助理教授),两年后为高级职位科学家(等同终身副教授);同时为美国国家研究资源中心(酵母资源中心(YRC),华盛顿大学)及斯克里普斯研究所“生理蛋白质组学中心”首席科学家。在高水平杂志上出版近50余篇学术论文,如Science、Nature Method、PLoS Biology、PNAS和Molecular Cell等。在蛋白质翻译后修饰的定量研究领域尤其出色。
2013年1月回国,参与中科院国家蛋白质科学中心建设,任职质谱系统主任、中心主任助理,并负责整个中心的技术部门管理工作。任职以来完成了把系统建立成国内外一流的平台的任务,高效地促进了生命科学领域的发展,并组建了一支精良的技术研发队伍。2014年6月至今,质谱系统已执行课题超过300个,并有12篇学术论文发表或正在投审在著名国际期刊上,如Science、Nature Immunology、PNAS和Molecular Cell等,以共同通讯作者发表两篇文章在EMBOJ和Scientific Report上。H-index为22。2014年获选为“中科院引进杰出技术人才”,获得中科院先导B追加经费。
报告联系人:1810组 张丽华(9720)