• Methods Mol. Biol. · Jan 2018

    Low Input Whole-Genome Bisulfite Sequencing Using a Post-Bisulfite Adapter Tagging Approach.

    • Julian R Peat and Sébastien A Smallwood.
    • Epigenetics Programme, Babraham Institute, Babraham Research Campus, Cambridge, CB22 3AT, UK.
    • Methods Mol. Biol. 2018 Jan 1; 1708: 161-169.

    AbstractThe epigenetic mark 5-methylcytosine confers heritable regulation of gene expression that can be dynamically modulated during transitions in cell fate. With the development of high-throughput sequencing technologies, it is now possible to obtain comprehensive genome-wide maps of the mammalian DNA methylation landscape, but the application of these techniques to limited material remains challenging. Here, we present an optimized protocol to perform whole-genome bisulfite sequencing on low inputs (100-5000 somatic cells) using a post-bisulfite adapter tagging approach. In this strategy, bisulfite treatment is performed prior to library generation in order to both convert unmethylated cytosines and fragment DNA to an appropriate size. Then sequencing adapters are added by complementary strand synthesis using random tetramer priming, and libraries are subsequently amplified by PCR.

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