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Polymerase switching on the C-strand of the telomere

Reactome ID: R-HSA-174411

中文名称

干扰素α/β信号通路

通路描述

I 型干扰素(IFNs)由多种基因组成,包括 IFNα(IFNA)、β(IFNB)、ω、ε和κ。在人类中,IFNA 基因由超过 13 个亚家族基因组成,而 IFNB 基因仅有一个。IFNA/B 蛋白家族中的大复合物均结合到同一个受体上,该受体由两条不同的链组成:IFNAR1 和 IFNAR2。IFNA/B 刺激 IFNAR 受体复合物导致形成两个转录激活复合物:IFNA 激活因子(AAF),它是 STAT1 和 IFN 刺激基因因子 3(ISGF3)的二聚体;AAF 通过结合 GAS(IFNG 激活位点)激活 IRF-1 基因,而 ISGF3 则激活多种干扰素诱导基因,包括 IRF3 和 IRF7。
英文描述
Polymerase switching on the C-strand of the telomere After the primers are synthesized on the G-Rich strand, Replication Factor C binds to the 3'-end of the initiator DNA to trigger polymerase switching. The non-processive nature of pol alpha catalytic activity and the tight binding of Replication Factor C to the primer-template junction presumably lead to the turnover of the pol alpha:primase complex. After the Pol alpha-primase primase complex is displaced from the primer, the proliferating cell nuclear antigen (PCNA) binds to form a "sliding clamp" structure. Replication Factor C then dissociates, and DNA polymerase delta binds and catalyzes the processive synthesis of DNA.

所含基因

26 个基因