Mass Spectrometry-based Analysis of Phosphorylation Pattern of RNA Polymerase II CTD by P-TEFb

Abstract

在真核细胞中,RNA聚合酶II(RNAPolII)负责大多数编码蛋白质mRNA和核内小RNA(snRNA)基因的转录,其碳端结构域(CTD)为RNA聚合酶II所特有,在结合转录循环和基因表达中扮演着重要的角色,转录循环过程中,TFIIH和P-TEFb是参与其磷酸化修饰调控的重要通用转录因子。其中,P-TEFb不仅是一种通用转录因子,同时也是艾滋病毒(HIV-1)转录复制过程中不可或缺的宿主转录因子之一。P-TEFb对CTD磷酸化模式的分析一直是研究热点。然而,CTD高度磷酸化状态及其七肽重复结构(YSPTSPS)等特性使其质谱分析面临巨大挑战。 本课题首先建立P-TEFb磷酸化RNA聚合酶I...The RNA polymerase II is responsible not only for transcription of thousands of protein-coding genes constituting the largest group of distinct individual genes in the eukaryotic genome, but also for genes encoding small noncoding RNAs (snRNA). Furthermore, it is found that the carboxyl-terminal domain (CTD) of RNA polymerase II is unique to this eukaryotic RNA polymerase. TFIIH and P-TEFb are imp...学位:医学硕士院系专业:药学院_药物分析学学号:3232014115342

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