返回搜索

RNA Polymerase I Transcription Initiation

Reactome ID: R-HSA-73762

中文名称

RNA 聚合酶 I 转录起始

通路描述

在起始阶段,双链 DNA 必须解链,转录开始。SL1 形成并与 UBF-1 和 rDNA 启动子相互作用。正是这个平台将活跃的 RNA 聚合酶 I 招募到 SL1:磷酸化 UBF-1:rDNA 启动子复合物上。哺乳动物 rRNA 基因前面有一个由 SL1 复合物识别的终止子。这种 SL1 调节的基线 Pol I 转录机器的乙酰化具有功能后果,表明可逆的乙酰化可能是调节 rDNA 转录的一种方式。
英文描述
RNA Polymerase I Transcription Initiation During initiation the double-stranded DNA must be melted and transcription begins. SL1 forms and interacts with UBF-1 and the rDNA promoter. It is this platform that will recruit active RNA polymerase I to the SL1:phosphorlated UBF-1:rDNA promoter complex.Mammalian rRNA genes are preceded by a terminator element that is recognized by the SL1 complex. This SL1 modulated acetylation of the basal Pol I transcription machinery has functional consequences suggesting that the reversible acetylation may be one way to regulate rDNA transcription.

所含基因

47 个基因