1. DNA recombination. Recombination initiation maps of individual human genomes.
- Author
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Pratto F, Brick K, Khil P, Smagulova F, Petukhova GV, and Camerini-Otero RD
- Subjects
- Alleles, Histone-Lysine N-Methyltransferase genetics, Histone-Lysine N-Methyltransferase metabolism, Humans, Male, Protein Binding, Spermatocytes, Telomere genetics, Chromosome Mapping, DNA Breaks, Double-Stranded, Genome, Human genetics, Genomic Instability, Homologous Recombination, Meiosis genetics
- Abstract
DNA double-strand breaks (DSBs) are introduced in meiosis to initiate recombination and generate crossovers, the reciprocal exchanges of genetic material between parental chromosomes. Here, we present high-resolution maps of meiotic DSBs in individual human genomes. Comparing DSB maps between individuals shows that along with DNA binding by PRDM9, additional factors may dictate the efficiency of DSB formation. We find evidence for both GC-biased gene conversion and mutagenesis around meiotic DSB hotspots, while frequent colocalization of DSB hotspots with chromosome rearrangement breakpoints implicates the aberrant repair of meiotic DSBs in genomic disorders. Furthermore, our data indicate that DSB frequency is a major determinant of crossover rate. These maps provide new insights into the regulation of meiotic recombination and the impact of meiotic recombination on genome function., (Copyright © 2014, American Association for the Advancement of Science.)
- Published
- 2014
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