Harnessing DOT1L and RAP80: unveiling new insights into BRCA1-mediated DNA repair for cancer therapy

The article titled “DOT1L-mediated RAP80 methylation promotes BRCA1 recruitment to elicit DNA repair” was published in August 2024 in the Proceedings of the National Academy of Sciences (PNAS) by Tang et al. It presents significant advancements in understanding the mechanism of the DNA damage response (DDR), specifically in the context of BRCA1-mediated DNA repair. The authors discovered a novel role of DOT1L, a histone methyltransferase, in facilitating the recruitment of the BRCA1-A complex to DNA damage sites through the methylation of RAP80. This finding has profound implications for the development of new therapeutic strategies, particularly in overcoming resistance to radiotherapy in cancer treatment.