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Recognition of DNA damage by PCNA-containing replication complex

Reactome ID: R-HSA-110314

中文名称

PCNA 复合物介导的 DNA 损伤识别

通路描述

PCNA 复合物介导的 DNA 损伤识别
受损的双链 DNA (dsDNA) 无法成功作为模板被复制 DNA 聚合酶 delta (POLD) 和 epsilon (POLE) 复合物使用 (Hoege et al. 2002)。当由 PCNA、RPA、RFC 和 POLD 或 POLE 组成的复制复合物在 DNA 损伤位点停滞时,PCNA 被 RAD18 结合 UBE2B 的单泛素化。POLD 或 POLE 从单泛素化 PCNA 解离,而 Y 家族 DNA 聚合酶 - REV1、POLH (DNA 聚合酶 eta)、POLK (DNA 聚合酶 kappa) 和 POLI (DNA 聚合酶 iota) 通过其泛素结合和 PCNA 结合基序结合单泛素化 PCNA,导致聚合酶转换并启动跨损伤合成 (TLS) (Hoege et al. 2002, Friedberg et al. 2005)。
英文描述
Recognition of DNA damage by PCNA-containing replication complex Damaged double strand DNA (dsDNA) cannot be successfully used as a template by replicative DNA polymerase delta (POLD) and epsilon (POLE) complexes (Hoege et al. 2002). When the replication complex composed of PCNA, RPA, RFC and POLD or POLE stalls at a DNA damage site, PCNA becomes monoubiquitinated by RAD18 bound to UBE2B (RAD6). POLD or POLE dissociate from monoubiquitinated PCNA, while Y family DNA polymerases - REV1, POLH (DNA polymerase eta), POLK (DNA polymerase kappa) and POLI (DNA polymerase iota) - bind monoubiquitinated PCNA through their ubiquitin binding and PCNA binding motifs, resulting in a polymerase switch and initiation of translesion synthesis (TLS) (Hoege et al. 2002, Friedberg et al. 2005).

所含基因

30 个基因