Control of structure-specific endonucleases during homologous recombination in eukaryotes.

Cédric Giaccherini, Pierre-Henri Gaillard

Current opinion in genetics & development 2021 Dec

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Structure-Specific Endonucleases (SSE) are specialized DNA endonucleases that recognize and process DNA secondary structures without any strict dependency on the nucleotide sequence context. This enables them to act virtually anywhere in the genome and to make key contributions to the maintenance of genome stability by removing DNA structures that may stall essential cellular processes such as DNA replication, transcription, repair and chromosome segregation. During repair of double strand breaks by homologous recombination mechanisms, DNA secondary structures are formed and processed in a timely manner. Their homeostasis relies on the combined action of helicases, SSE and topoisomerases. In this review, we focus on how SSE contribute to DNA end resection, single-strand annealing and double-strand break repair, with an emphasis on how their action is fine-tuned in those processes. Copyright © 2021 The Author(s). Published by Elsevier Ltd.. All rights reserved.

Citation

Cédric Giaccherini, Pierre-Henri Gaillard. Control of structure-specific endonucleases during homologous recombination in eukaryotes. Current opinion in genetics & development. 2021 Dec;71:195-205