Fig. 8: RAD18 facilitates the recruitment of Polη to the DNA damage sites within the nucleus.

A The ribbon diagram of RAD18, Polη, and ub-PCNA reproduced from PDB. B Protein-protein docking for RAD18-Polη, RAD18- ub-PCNA, and Polη-ub-PCNA was performed using HDOCK. C A positive correlation between RAD18 and Polη expression in female gynecological malignancies was obtained from the CorrelationAnalyzeR tool. D Co-immunoprecipitation of RAD18, ub-PCNA, and Polη was performed using Polη antibody. A representative western blot image validates the interaction between RAD18, ub-PCNA, and Polη. E Immunofluorescence staining of OVCAR3 adherent cells with RAD18 and Polη showed that Polη had reduced nuclear localization in the absence of RAD18 following cisplatin treatment.