Hairpin Capture of DNA End Structures reveals chromosomal DNA end structure with single nucleotide resolution

ABSTRACT: The structure of broken DNA ends is a critical determinant of the pathway used for DNA double strand break (DSB) repair. Here, we develop an approach, hairpin capture of DNA end structures (HCoDES), which elucidates chromosomal DNA end structures at single nucleotide resolution. HCoDES defines structures of physiologic DSBs generated by the RAG endonuclease, as well as those generated by nucleases widely used for genome editing. Analysis of G1-phase cells deficient in H2AX or 53BP1 reveals DNA ends that are frequently resected to form long single-stranded overhangs that can be repaired by mutagenic pathways. In addition to 3’ overhangs, many of these DNA ends unexpectedly form long 5’ single-stranded overhangs. The divergence in DNA end structures resolved by HCoDES suggests that H2AX

ORGANISM(S): Mus musculus

SUBMITTER: Jacqueline Payton 

PROVIDER: E-GEOD-62534 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress