Conditional Expression of RNA Polymerase II in Mammalian Cells

Conditional Expression of RNA Polymerase II in Mammalian Cells
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RNA 聚合酶 II 在哺乳动物细胞中的条件表达

DOI:
--
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发表时间:
2000
影响因子:
4.8
通讯作者:
D. Eick
D. Eick
中科院分区:
生物学2区
文献类型:
--
作者:
M. Meininghaus;Rob D. Chapman;M. Horndasch;D. Eick

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哺乳动物RNA聚合酶II大亚基的羧基末端结构域(CTD)含有52个重复的七肽,其是多种激酶的靶标。过度磷酸化的CTD招募了mRNA加帽、剪接和3 '加工的重要因子。然而,CTD在体内转录过程中的作用尚不清楚。我们在B细胞中有条件地表达了几乎完全缺失CTD(LS*Δ5)的α-鹅膏蕈碱抗性大亚基。这些细胞在α-鹅膏蕈碱存在下细胞基因的整体转录有缺陷。此外,pol Ⅱ携带LS*Δ5不能转录到hsp 70 A和c-fos基因启动子近端的暂停位点。结果表明,CTD已经需要启动子近端暂停和成熟的mRNA之前发生的步骤。
The carboxyl-terminal domain (CTD) of the large subunit of mammalian RNA polymerase II contains 52 repeats of a heptapeptide that is the target of a variety of kinases. The hyperphosphorylated CTD recruits important factors for mRNA capping, splicing, and 3′-processing. The role of the CTD for the transcription process in vivo, however, is not yet clear. We have conditionally expressed an α-amanitin-resistant large subunit with an almost entirely deleted CTD (LS*Δ5) in B-cells. These cells have a defect in global transcription of cellular genes in the presence of α-amanitin. Moreover, pol II harboring LS*Δ5 failed to transcribe up to the promoter-proximal pause sites in thehsp70A and c-fos gene promoters. The results indicate that the CTD is already required for steps that occur before promoter-proximal pausing and maturation of mRNA.
DOI: 10.1101/gad.6.11.2201
发表时间: 1992-11-01
影响因子: 10.5
作者:
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发表时间: 1998-02-01
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针对麦芽 RNA 聚合酶 II 制备的单克隆抗体与真核 RNA 聚合酶 II 的七肽重复序列反应,抑制体内和体外转录。
DOI: --
发表时间: 1989
期刊: The Journal of biological chemistry
影响因子: --
作者:
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