ATR is a multifunctional regulator of male mouse meiosis

Meiotic cells undergo genetic exchange between homologs through programmed DNA double-strand break (DSB) formation, recombination and synapsis. In mice, the DNA damage-regulated phosphatidylinositol-3-kinase-like kinase (PIKK) ATM regulates all of these processes. However, the meiotic functions of t...

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Detalles Bibliográficos
Autores: Widger, Alexander, Mahadevaiah, Shantha K., Lange, Julian, Elinati, Elias, Zohren, Jasmin, Hirota, Takayuki|||0000-0002-8145-3225, Pacheco, Sarai|||0000-0002-3425-4901, Maldonado Linares, Andros|||0000-0001-8322-8390, Stanzione, Marcello, Ojarikre, Obah, Maciulyte, Valdone, De Rooij, Dirk G.., Tóth, Attila, Roig, Ignasi|||0000-0003-0313-3581, Keeney, Scott|||0000-0002-1283-6417, Turner, James M. A.
Tipo de recurso: artículo
Fecha de publicación:2018
País:España
Institución:Universitat Autònoma de Barcelona
Repositorio:Dipòsit Digital de Documents de la UAB
Idioma:inglés
OAI Identifier:oai:ddd.uab.cat:225203
Acceso en línea:https://ddd.uab.cat/record/225203
https://dx.doi.org/urn:doi:10.1038/s41467-018-04850-0
Access Level:acceso abierto
Palabra clave:Animals
Ataxia Telangiectasia Mutated Proteins
Cell Cycle Proteins
Chromosome Pairing
Chromosomes, Mammalian
DNA Breaks, Double-Stranded
In Situ Hybridization, Fluorescence
Male
Meiosis
Meiotic Prophase I
Mice, Inbred C57BL
Mice, Knockout
Mice, Transgenic
Nuclear Proteins
Rad51 Recombinase
Spermatocytes
Descripción
Sumario:Meiotic cells undergo genetic exchange between homologs through programmed DNA double-strand break (DSB) formation, recombination and synapsis. In mice, the DNA damage-regulated phosphatidylinositol-3-kinase-like kinase (PIKK) ATM regulates all of these processes. However, the meiotic functions of the PIKK ATR have remained elusive, because germline-specific depletion of this kinase is challenging. Here we uncover roles for ATR in male mouse prophase I progression. ATR deletion causes chromosome axis fragmentation and germ cell elimination at mid pachynema. This elimination cannot be rescued by deletion of ATM and the third DNA damage-regulated PIKK, PRKDC, consistent with the existence of a PIKK-independent surveillance mechanism in the mammalian germline. ATR is required for synapsis, in a manner genetically dissociable from DSB formation. ATR also regulates loading of recombinases RAD51 and DMC1 to DSBs and recombination focus dynamics on synapsed and asynapsed chromosomes. Our studies reveal ATR as a critical regulator of mouse meiosis.

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