Anke Geng, Jiahui Sun, Huanyin Tang, Yang Yu, Xiyue Wang, Jingyuan Zhang, Xiaona Wang, Xiaoxiang Sun, Xiaofang Zhou, Neng Gao, Rong Tan, Zhu Xu, Ying Jiang, Zhiyong Mao
Sirtuin 2 (SIRT2) regulates the maintenance of genome integrity by targeting pathways of DNA damage response and homologous recombination repair. However, whether and how SIRT2 promotes base excision repair (BER) remain to be determined. Here, we found that independent of its catalytic activity SIRT2 interacted with the critical glycosylase OGG1 to promote OGG1 recruitment to its own promoter upon oxidative stress, thereby enhancing OGG1 promoter activity and increasing BER efficiency. Further studies revealed that SIRT2 was phosphorylated on S46 and S53 by ATM/ATR upon oxidative stress, and SIRT2 phosphorylation enhanced the SIRT2-OGG1 interaction and mediated the stimulatory effect of SIRT2 on OGG1 promoter activity...
March 30, 2024: Nucleic Acids Research