Assessment of protein dynamics and DNA repair following generation of DNA double-strand breaks at defined genomic sites
| Autor: | Michael B. Kastan, Raymond J. Monnat, Elijahu Berkovich |
|---|---|
| Rok vydání: | 2008 |
| Předmět: |
Chromatin Immunoprecipitation
Endodeoxyribonucleases HMG-box DNA Repair DNA repair Genome Human Genetic Vectors Molecular Probe Techniques Biology ChIP-on-chip Molecular biology General Biochemistry Genetics and Molecular Biology ChIP-sequencing Chromatin Cell biology chemistry.chemical_compound chemistry Humans Human genome DNA Breaks Double-Stranded Chromatin immunoprecipitation DNA |
| Zdroj: | Nature protocols. 3(5) |
| ISSN: | 1750-2799 |
| Popis: | The formation of protein aggregates (foci) at sites of DNA double-strand breaks (DSBs) is mainly studied by immunostaining and is hence limited by the low resolution of light microscopy and the availability of appropriate and selective antibodies. Here, we describe a system using enzymatic creation of site-specific DNA DSBs within the human genome combined with chromatin immunoprecipitation (ChIP) that enables molecular probing of a DSB. Following induction of the I-PpoI enzyme and generation of DSBs, cellular DNA and proteins are crosslinked and analyzed by ChIP for specific proteins at the site of the break. The system allows the direct detection of protein and chromatin dynamics at the site of the break with high resolution, as well as direct measurement of DNA repair defects in human cells. Starting with fragmented chromatin, results can be achieved in 2-3 d. |
| Databáze: | OpenAIRE |
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