QQ客服 官方微博 反馈留言

	Isolation and functional characterization of P-TEFb-associated factors that control general and HIV-1 transcriptional elongation
	Chen, RuichuanLiu ; Chen RC(陈瑞川) ; Min Liu ; Zhang, Kai ; Zhou, Qiang
	2010-04-10
关键词	HIV-1 transcription Tat-transactivation P-TEFb P-TEFb-associated factors Affinity-purification
英文摘要	Originally identified as a factor crucial for RNA polymerase (Pol)11 transcriptional elongation of cellular genes, the P-TEFb kinase was subsequently shown to also serve as a specific host co-factor required for HIV-1 transcription. Recruited by either the bromodomain protein Brd4 to cellular promoters for general transcription or the HIV-1 Tat protein to the viral LTR for activated HIV-1 transcription, P-TEFb stimulates the processivity of Pol II through phosphorylating the C-terminal domain of Pol II and a pair of negative elongation factors, leading to the synthesis of full-length transcripts. However, abundant evidence indicates that P-TEFb does not act alone in the cell and that all of its known biological functions are likely mediated through the interactions with various regulators. Although a number of P-TEFb-associated factors have already been identified, there are likely more yet to be discovered. Given that P-TEFb plays an essential role in HIV-1 transcription, a major challenge facing the field is to identify all the P-TEFb-associated factors and determine how they may modulate Tat-transactivation and HIV-1 replication. Described here is a set of experimental procedures that have not only enabled us to isolate and identify several P-TEFb-associated factors, but also provided the means to characterize their biochemical functions in HIV-1 transcriptional control. In light of the recent demonstrations that transcriptional elongation plays a much more important role in controlling metazoan gene expression than previously thought, the techniques presented here will also be useful for analyzing Pol II elongation of cellular genes. (C) 2010 Elsevier Inc. All rights reserved.; National Institutes of Health[R01AI41757-11, R01AI41757-11S1]; UC Cancer Research Coordinating Committee[027342]; National Natural Science Foundation of China[30670408, 30930046, 30470371]; Natural Science Foundation of Fujian[2008J0108]
语种	英语
出版者	ACADEMIC PRESS INC ELSEVIER SCIENCE
内容类型	期刊论文
源URL	[http://dx.doi.org/doi:10.1016/j.ymeth.2010.04.005]
专题	生命科学－已发表论文
推荐引用方式 GB/T 7714	Chen, RuichuanLiu,Chen RC,Min Liu,et al. Isolation and functional characterization of P-TEFb-associated factors that control general and HIV-1 transcriptional elongation[J],2010.
APA	Chen, RuichuanLiu,陈瑞川,Min Liu,Zhang, Kai,&Zhou, Qiang.(2010).Isolation and functional characterization of P-TEFb-associated factors that control general and HIV-1 transcriptional elongation..
MLA	Chen, RuichuanLiu,et al."Isolation and functional characterization of P-TEFb-associated factors that control general and HIV-1 transcriptional elongation".(2010).

个性服务

查看访问统计

相关权益政策

暂无数据

收藏/分享

除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。