Sensitive mapping of recombination hotspots using sequencing-based detection of ssDNA.

Abstract:

:Meiotic DNA double-stranded breaks (DSBs) initiate genetic recombination in discrete areas of the genome called recombination hotspots. DSBs can be directly mapped using chromatin immunoprecipitation followed by sequencing (ChIP-seq). Nevertheless, the genome-wide mapping of recombination hotspots in mammals is still a challenge due to the low frequency of recombination, high heterogeneity of the germ cell population, and the relatively low efficiency of ChIP. To overcome these limitations we have developed a novel method--single-stranded DNA (ssDNA) sequencing (SSDS)--that specifically detects protein-bound single-stranded DNA at DSB ends. SSDS comprises a computational framework for the specific detection of ssDNA-derived reads in a sequencing library and a new library preparation procedure for the enrichment of fragments originating from ssDNA. The use of our technique reduces the nonspecific double-stranded DNA (dsDNA) background >10-fold. Our method can be extended to other systems where the identification of ssDNA or DSBs is desired.

journal_name

Genome Res

journal_title

Genome research

authors

Khil PP,Smagulova F,Brick KM,Camerini-Otero RD,Petukhova GV

doi

10.1101/gr.130583.111

subject

Has Abstract

pub_date

2012-05-01 00:00:00

pages

957-65

issue

5

eissn

1088-9051

issn

1549-5469

pii

gr.130583.111

journal_volume

22

pub_type

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