Project description:During development, the inherited DNA methylation patterns from the parental gametes needs to be remodeled into a state compatible with embryonic pluripotency. In Zebrafish, this remodeling is achieved by the maternal methylome becoming hypomethylated to match the paternal methylome. However, how this is achieved in medaka (another teleost fish) is currently not known. Moreover, how DNA methylation remodeling is impacted in hybrid organisms, and the effects this may have on their development, is also not known. Here we address these questions by generation whole genome bisulfite sequencing data for zebrafish, medaka and zebrafish medaka embryos.
Project description:We have improved the DamID method to make it applicable for vertebrate life specimens. We use iDamID-seq to profile the binding profile of the transcription factor Rx2 in medaka embryos at stage 22 of development. We compare two replicates of the fusion Dam-Rx2 against two replicates of the fusion Dam-GFP as control. Medaka embryos at 1-cell stage were injected with mRNA transcribed in vitro from one of the two Dam fusions. The embryos were allowed to grow in normal conditions up to stage 22. The genomic DNA was isolated and treated to extract only the DpnI fragments that had adenine methylation. These fragments were subjected to deep sequencing.
