The Ess1 prolyl isomerase: traffic cop of the RNA polymerase II transcription cycle.

The Ess1 prolyl isomerase: traffic cop of the RNA polymerase II transcription cycle.
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DOI:
10.1016/j.bbagrm.2014.02.001
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发表时间:
2014
影响因子:
4.7
通讯作者:
Hanes, Steven D.
Hanes, Steven D.
中科院分区:
生物学2区
文献类型:
--
作者:
Hanes, Steven D.

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β 1是一种脯氨酰异构酶,调节真核生物RNA聚合酶II的结构和功能。Rpb 1是RNA pol II的最大亚基,它通过催化Rpb 1羧基末端结构域(CTD)内pSer 5-Pro6键的顺式/反式转化,并在较小程度上催化pSer 2-Pro3键的顺式/反式转化而起作用。从酵母菌到人类的生物体中,α 1是保守的。在芽殖酵母中,BMP 1是生长所必需的,并且是有效转录起始和终止、RNA加工和隐蔽转录抑制所必需的。在哺乳动物中,PIN 1(称为Pin 1)在多种途径中发挥作用,包括转录,但它不是必需的。最近的研究表明,RIP 1协调CTD结合蛋白的结合和释放,CTD结合蛋白在RNA pol II复合物中起辅因子的作用。以这种方式,pol 1在写入(和阅读)所谓的CTD代码以促进成熟RNA pol II转录物(包括非编码RNA和mRNA)的产生中起着不可或缺的作用。
Ess1 is a prolyl isomerase that regulates the structure and function of eukaryotic RNA polymerase II. Ess1 works by catalyzing the cis/trans conversion of pSer5–Pro6 bonds, and to a lesser extent pSer2–Pro3 bonds, within the carboxy-terminal domain (CTD) of Rpb1, the largest subunit of RNA pol II. Ess1 is conserved in organisms ranging from yeast to humans. In budding yeast, Ess1 is essential for growth and is required for efficient transcription initiation and termination, RNA processing, and suppression of cryptic transcription. In mammals, Ess1 (called Pin1) functions in a variety of pathways, including transcription, but it is not essential. Recent work has shown that Ess1 coordinates the binding and release of CTD-binding proteins that function as co-factors in the RNA pol II complex. In this way, Ess1 plays an integral role in writing (and reading) the so-called CTD code to promote production of mature RNA pol II transcripts including non-coding RNAs and mRNAs.
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