RNA 聚合酶 III 从类型 2 启动子转录起始
中文名称
通路描述
类型 2 启动子可以招募 TFIIIC 而不需要 TFIIIA 的帮助,因为 TFIIIC 直接结合 A 盒和 B 盒。对于类型 1 启动子,这随后允许 Brf1-TFIIIB 和 RNA 聚合酶 III 的结合。重要的是,在酵母系统中,一旦 Brf1-TFIIIB 被招募到类型 1 或 2 启动子,TFIIIA 和/或 TFIIIC 可以用高盐或肝素处理从 DNA 上剥离。Brf1-TFIIIB 保持结合 DNA,足以引导多次转录。
英文描述
RNA Polymerase III Transcription Initiation From Type 2 Promoter The type 2 promoters can recruit TFIIIC without the help of TFIIIA because TFIIIC binds directly to the A and B boxes. As for the type 1 promoters, this then allows the binding of Brf1-TFIIIB and RNA polymerase III. Importantly, in the yeast system, once Brf1-TFIIIB has been recruited to type 1 or 2 promoters, TFIIIA and/or TFIIIC can be stripped from the DNA with high salt or heparin treatment. Brf1-TFIIIB remains bound to the DNA and is sufficient to direct multiple rounds of transcription .
所含基因
27 个基因