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Annual Review of Genetics

Volume 48, 2014

Transcription-Associated Mutagenesis

Abstract

Transcription requires unwinding complementary DNA strands, generating torsional stress, and sensitizing the exposed single strands to chemical reactions and endogenous damaging agents. In addition, transcription can occur concomitantly with the other major DNA metabolic processes (replication, repair, and recombination), creating opportunities for either cooperation or conflict. Genetic modifications associated with transcription are a global issue in the small genomes of microorganisms in which noncoding sequences are rare. Transcription likewise becomes significant when one considers that most of the human genome is transcriptionally active. In this review, we focus specifically on the mutagenic consequences of transcription. Mechanisms of transcription-associated mutagenesis in microorganisms are discussed, as is the role of transcription in somatic instability of the vertebrate immune system.

Keyword(s): class-switch recombination, cytosine deamination, DNA damage, somatic hypermutation, topoisomerase
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2014-11-23
2024-04-29
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Transcription-Associated Mutagenesis
Annual Review of Genetics 48, 341 (2014); https://doi.org/10.1146/annurev-genet-120213-092015
/content/journals/10.1146/annurev-genet-120213-092015
/content/journals/10.1146/annurev-genet-120213-092015
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