ZNF212 promotes genomic integrity through direct interaction with TRAIP

Area of Science:

• Molecular Biology
• Genetics
• Cell Biology

Background:

• TRAIP is essential for DNA damage response (DDR), homologous recombination (HR), and interstrand crosslink (ICL) repair.
• The precise roles of TRAIP in mammalian DNA repair pathways remain incompletely elucidated.

Purpose of the Study:

• To identify novel binding partners of TRAIP involved in DNA repair.
• To elucidate the function of ZNF212 in the DDR, HR, and ICL repair pathways.

Main Methods:

• Co-immunoprecipitation to identify TRAIP binding partners.
• Immunofluorescence microscopy to assess colocalization at DNA damage sites.
• siRNA-mediated depletion and epistatic analysis in mammalian cells and mouse embryonic stem cells (mESCs).

Main Results:

• ZNF212 was identified as a novel TRAIP binding partner that colocalizes with TRAIP at DNA damage sites.
• Recruitment of TRAIP and ZNF212 to DNA damage sites is mutually dependent.
• ZNF212 functions epistatically to TRAIP in DDR and HR-mediated repair.
• ZNF212 acts upstream of Neil3 and Fanconi anemia (FA) pathways in ICL repair.
• ZNF212 directly interacts with NEIL3, promoting its recruitment to ICL lesions.

Conclusions:

• ZNF212 is a novel component of the DDR, HR, and ICL repair pathways.
• ZNF212 functions in concert with TRAIP and NEIL3 to facilitate DNA repair.
• These findings expand our understanding of the molecular mechanisms governing genome stability.