Targeting DNA-Protein Crosslinks via Post-Translational Modifications

Area of Science:

• Molecular Biology
• Genetics
• Biochemistry

Background:

• DNA-protein crosslinks (DPCs) are cytotoxic DNA lesions that impede DNA replication and transcription.
• Cellular mechanisms exist to counteract DPCs, involving protein degradation, crosslink resolution, or DNA incision.
• Understanding DPC sensing and targeted removal pathways is critical.

Purpose of the Study:

• To review current knowledge on mechanisms triggering DPC removal via post-translational modifications (PTMs).
• To focus on ubiquitylation, SUMOylation, and PARylation in DPC repair.
• To identify knowledge gaps and emerging hypotheses in DPC repair.

Main Methods:

• Literature review of DPC repair mechanisms.
• Focus on the role of PTMs in DPC removal.
• Analysis of ubiquitylation, SUMOylation, and PARylation pathways.

Main Results:

• DPC removal can be triggered by DNA replication via proteolysis.
• DPCs are also efficiently removed in the absence of DNA replication.
• PTMs, including ubiquitylation, SUMOylation, and PARylation, are essential for orchestrating DPC repair routes.

Conclusions:

• PTMs play versatile and essential roles in directing DPC removal pathways.
• Further research is needed to address current knowledge gaps and explore emerging hypotheses in DPC repair.
• The interplay between DNA replication and PTMs in DPC processing requires further elucidation.