Transcription and replication: far relatives make uneasy bedfellows.

Area of Science:

• Molecular Biology
• Genetics
• Genomics

Background:

• Genomic stability is crucial for cellular and organismal fitness.
• Enzymatic DNA transactions, including transcription, pose risks to DNA helix stability.
• The convergence of transcription and replication increases the likelihood of genomic alterations.

Purpose of the Study:

• To review the threats transcription poses to genome stability.
• To highlight recent findings on DNA damage in transcription-associated mutagenesis (TAM) in mammalian cells.
• To discuss the implications of TAM for human health, disease, and carcinogenesis.

Main Methods:

• Literature review and synthesis of recent research.
• Focus on DNA damage mechanisms in transcription-associated mutagenesis.
• Analysis of TAM's role in mammalian systems.

Main Results:

• Transcription can directly threaten genomic integrity.
• DNA damage plays a significant role in transcription-associated mutagenesis.
• TAM is implicated in various diseases, notably cancer.

Conclusions:

• Transcription-induced DNA damage is a major source of mutations.
• Understanding TAM mechanisms is crucial for addressing genomic instability and disease.
• An updated nomenclature for TAM forms is proposed.