Chapter title |
Precise Identification of DNA-Binding Proteins Genomic Location by Exonuclease Coupled Chromatin Immunoprecipitation (ChIP-exo).
|
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Chapter number | 11 |
Book title |
DNA-Protein Interactions
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Published in |
Methods in molecular biology, January 2015
|
DOI | 10.1007/978-1-4939-2877-4_11 |
Pubmed ID | |
Book ISBNs |
978-1-4939-2876-7, 978-1-4939-2877-4
|
Authors |
Matteau, Dominick, Rodrigue, Sébastien, Dominick Matteau, Sébastien Rodrigue |
Abstract |
DNA-binding proteins play a crucial role in all living organisms by interacting with various DNA sequences across the genome. While several methods have been used to study the interaction between DNA and proteins in vitro, chromatin immunoprecipitation followed by sequencing (ChIP-seq) has become the standard technique for identifying the genome-wide location of DNA-binding proteins in vivo. However, the resolution of standard ChIP-seq methodology is limited by the DNA fragmentation process and presence of contaminating DNA. A significant improvement of the ChIP-seq technique results from the addition of an exonuclease treatment during the immunoprecipitation step (ChIP-exo) that lowers background noise and more importantly increases the identification of binding sites to a level near to single-base resolution by effectively footprinting DNA-bound proteins. By doing so, ChIP-exo offers new opportunities for a better characterization of the complex and fascinating architecture that resides in DNA-proteins interactions and provides new insights for the comprehension of important molecular mechanisms. |
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