首页> 外文期刊>Journal of Molecular Biology >THE KIN28 GENE IS REQUIRED BOTH FOR RNA POLYMERASE II MEDIATED TRANSCRIPTION AND PHOSPHORYLATION OF THE RPB1P CTD
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THE KIN28 GENE IS REQUIRED BOTH FOR RNA POLYMERASE II MEDIATED TRANSCRIPTION AND PHOSPHORYLATION OF THE RPB1P CTD

机译:RNA聚合酶II介导RPB1P CTD的转录和磷酸化均需要KIN28基因

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摘要

Kin28p, associated with cyclin Ccl1p, is a putative cyclin-dependent kinase (CDK) of the p34(cdc2) family in Saccharomyces cerevisiae. Search for mutations co-lethal (syn mutations) with a kin28 thermosensitive mutation (kin28-ts3) has uncovered genetic interactions between gene KIN28 and genes RAD3, SIN4, STI1 and CDC37. The genetic interaction between KIN28 and the CDC37 cell division cycle gene suggests that a connection exists between the activity of CDK-Kin28p and cell-cycle progression. Both RAD3 and SIN4 gene products are implicated in the RNA polymerase II transcription process. Here we show that RNA polymerase II transcription is drastically reduced in a kin28-ts mutant, at restrictive temperature. This impairment correlates with a markedly decreased phosphorylation of the C-terminal domain (CTD) of the largest subunit of RNA polymerase II (Rpb1p). Thus, the Kin28 gene product is required in vivo for RNA polymerase II phosphorylation and transcriptional activity as recently suggested by experiments using an in vitro reconstituted system. [References: 68]
机译:Kin28p,与细胞周期蛋白Ccl1p相关,是啤酒酵母中p34(cdc2)家族的一种假定的细胞周期蛋白依赖性激酶(CDK)。寻找同致命的突变(同突变)与kin28热敏突变(kin28-ts3)已发现基因KIN28与基因RAD3,SIN4,STI1和CDC37之间的遗传相互作用。 KIN28和CDC37细胞分裂周期基因之间的遗传相互作用表明CDK-Kin28p的活性与细胞周期进程之间存在联系。 RAD3和SIN4基因产物均与RNA聚合酶II转录过程有关。在这里我们显示,在限制性温度下,kin28-ts突变体中RNA聚合酶II转录急剧减少。这种损伤与RNA聚合酶II(Rpb1p)最大亚基的C末端结构域(CTD)的磷酸化明显降低有关。因此,Kin28基因产物在体内是RNA聚合酶II磷酸化和转录活性所必需的,正如最近使用体外重构系统进行的实验所表明的那样。 [参考:68]

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