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Ammonium persulfate (APS)

Company: Fisher Scientific
Catalog#: A2050010.0
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Electrophoretic Mobility Shift Assay of in vitro Phosphorylated RNA Polymerase II Carboxyl-terminal Domain Substrates
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2020-06-20
[Abstract]  Eukaryotic RNA polymerase II transcribes all protein-coding mRNAs and is highly regulated. A key mechanism directing RNA polymerase II and facilitating the co-transcriptional processing of mRNAs is the phosphorylation of its highly repetitive carboxyl-terminal domain (CTD) of its largest subunit, RPB1, at specific residues. A variety of techniques exist to identify and quantify the degree of CTD phosphorylation, including phosphorylation-specific antibodies and mass spectrometry. Electrophoretic mobility shift assays (EMSAs) have been utilized since the discovery of CTD phosphorylation and continue to represent a simple, direct, and widely applicable approach for qualitatively monitoring CTD phosphorylation. We present a standardized method for EMSA analysis of recombinant GST-CTD ... [摘要]  [摘要 ] 真核RNA聚合酶II转录所有编码蛋白质的mRNA,并且受到高度调节。指导RNA聚合酶II并促进mRNA的共转录加工的关键机制是其高度重复的羧基末端结构域(CTD)的磷酸化。最大的亚基RPB1位于特定残基。存在多种鉴定和定量CTD磷酸化程度的技术,包括磷酸化特异性抗体和质谱法。自发现CTD磷酸化和本文提出了一种标准化的方法,用于EMSA分析被多种CTD激酶磷酸化的重组GST-CTD底物的EMSA方法,以及在变性/还原和还原条件下分析样品的策略。提供了半本地条件。此方法表示简单,直接,以及使用分子生物学实验室通用的设备监测重组底物中CTD磷酸化的可重现方法,该设备可轻松应用于下游分析,包括免疫印迹和质谱分析。

[背景 ] 真核生物RNA聚合酶II(RNAPII)产生所有蛋白质编码的mRNA,小核,小核仁,和许多微小RNA (杰罗尼莫等,2013;梅菲尔德。等,2016) 。各种机制中规范RNAPII活动要赋予特异性基因表达和促进生物处理工艺。在这些是直接翻译后修饰中RNAPII自己在形式的磷酸化(梅菲尔德等,2016) ,脯氨酰异构(梅菲尔德等,2015) ,甲基化(迪亚斯等人,2015年)和乙酰化(交银施罗德等,2013) 。一些研究最多的修饰是磷酸化的C端结构域RNAPII最大的亚基RPB1中(CTD) ...

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