Bogdanovic, O., Fernández-Miñán, A., Tena, J.J., de la Calle-Mustienes, E., and Gómez-Skarmeta, J.L. (2013) The developmental epigenomics toolbox: ChIP-seq and MethylCap-seq profiling of early zebrafish embryos. Methods (San Diego, Calif.). 62(3):207-15.
Genome-wide profiling of DNA methylation and histone modifications answered many questions as to how the genes are regulated on a global scale and what their epigenetic makeup is. Yet, little is known about the function of these marks during early vertebrate embryogenesis. Here we provide detailed protocols for ChIP-seq and MethylCap-seq procedures applied to zebrafish (Danio rerio) embryonic material at four developmental stages. As a proof of principle, we have profiled on a global scale a number of post-translational histone modifications including H3K4me1, H3K4me3 and H3K27ac. We demonstrate that these marks are dynamic during early development and that such developmental transitions can be detected by ChIP-seq. In addition, we applied MethylCap-seq to show that developmentally-regulated DNA methylation remodeling can be detected by such a procedure. Our MethylCap-seq data concur with previous DNA methylation studies of early zebrafish development rendering this method highly suitable for the global assessment of DNA methylation in early vertebrate embryos.
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