Excess Single-Stranded DNA Inhibits Meiotic Double-Strand Break Repair
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چکیده
منابع مشابه
Excess Single-Stranded DNA Inhibits Meiotic Double-Strand Break Repair
During meiosis, self-inflicted DNA double-strand breaks (DSBs) are created by the protein Spo11 and repaired by homologous recombination leading to gene conversions and crossovers. Crossover formation is vital for the segregation of homologous chromosomes during the first meiotic division and requires the RecA orthologue, Dmc1. We analyzed repair during meiosis of site-specific DSBs created by ...
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The controlled fragmentation of chromosomes by DNA double-strand breaks (DSBs) initiates meiotic recombination, which is essential for meiotic chromosome segregation in most eukaryotes. This chapter describes a straightforward microarray-based approach to measure the genome-wide distribution of meiotic DSBs by detecting the single-stranded DNA (ssDNA) that transiently accumulates at DSB sites d...
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The integrity of genomic DNA is crucial for its function. And yet, DNA in living cells is inherently unstable. It is subject to mechanical stress and to many types of chemical modification that may lead to breaks in one or both strands of the double helix. Within the cell, reactive oxygen species generated by normal respiratory metabolism can cause double-strand breaks, as can stalled DNA repli...
متن کاملMapping of Meiotic Single-Stranded DNA Reveals Double-Strand-Break Hotspots near Centromeres and Telomeres
BACKGROUND Every chromosome requires at least one crossover to be faithfully segregated during meiosis. At least two levels of regulation govern crossover distribution: where the initiating DNA double-strand breaks (DSBs) occur and whether those DSBs are repaired as crossovers. RESULTS We mapped meiotic DSBs in budding yeast by identifying sites of DSB-associated single-stranded DNA (ssDNA) a...
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ژورنال
عنوان ژورنال: PLoS Genetics
سال: 2007
ISSN: 1553-7404
DOI: 10.1371/journal.pgen.0030223