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Brd4-P-TEFb and SECs complexs cooperatively regulate RNA Pol II pause release via different recruitment pathways

Abstract

真核基因转录调控是细胞基因表达调控网络的基础,细胞内编码蛋白的基因和核内小RNA(snRNA)的转录是由RNA聚合酶II(RNAPolII)负责的。RNAPolII控制的转录由前起始复合物组装、转录起始、启动子清理、转录延伸、转录终止等5步依次协同完成。正性转录延伸因子b(P-TEFb)发现之前,研究人员一直认为转录前起始复合物组装和转录起始是转录调控的关键步骤。随着人们对P-TEFb在转录调控方面研究的深入,发现转录延伸同样受到严密及精细的调控,是基因转录的限速步骤。 最近的研究表明:RNAPolII在启动子区附近暂停(RNAPolIIpromoter-proximalpausing)的调...Regulation of transcription is fundamental to the control of cellular gene expression program. In eukaryotic cells, the transcription of protein coding genes and most snRNA is controlled by RNA polymerase II. The RNA Pol II transcription cycle is comprised of multiple sequencal and cooperative steps, including pre-initiation complex assembly(PIC), initiation, promoter clearance, elongation and ter...学位:理学博士院系专业:生命科学学院_生物化学与分子生物学学号:2162011015395

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