Project description:Using a pooled (n=10) zebrafish liver DNA, we generated base-resolution DNA methylation maps to document epigenetic landscape in zebrafish genome. Here we generated single-nucleotide resoultion DNA methylation map of zebrafish pooled liver sample using Reduced Representation Bisulfite Sequencing (RRBS)
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:BmN4 cells are cultured cells derived from Bombyx mori ovaries and widely used to study transposon silencing by PIWI-interacting RNAs (piRNAs). A high-accurate genome sequence of BmN4 cells is required to analyze the piRNA pathway using RNA-seq. The genome sequence of BmN4 cells was assembled using Pacific Biosciences (PacBio) HiFi and Oxford Nanopore technology Ultralong (ONT-UL) reads. Microscopic observation and image analysis showed that BmN4 cells were octoploid on average, and the number of chromosomes per cell was highly variable. We concluded the haplotype-resolved assembly of such a complex genome would be difficult; therefore, we assembled a consensus genome sequence. RNA-seq analysis of Siwi knockdown cells also revealed that Siwi-piRISC may target Countdown (Cd), an LTR retrotransposon. By comparing the consensus genome sequence with the reads, we identified differences between haplotypes, particulary structural variants, suggesting that some transposons, including Countdown, increased their copy number in BmN4 cells.
Project description:In this study, we have applied ChIP-Seq to identify putative regulatory elements throughout the zebrafish genome. For this purpose we identified sequences within the zebrafish genome that associate with H3K4me1 and H3K4me3, which are epigenetic modifications known to be associated with active cis-regulatory elements in other species. Determination of H3K4me1- and H3K4me3-binding sites in the zebrafish genome.
Project description:The proteome of human brain synapses is highly complex and mutated in over 130 diseases. This complexity arose from two whole genome duplications early in the vertebrate lineage. Zebrafish are used in modelling human diseases, however its synapse proteome is uncharacterised and whether the teleost-specific genome duplication (TSGD) influenced complexity is unknown. We report the first characterisation of the proteomes and ultrastructure of central synapses in zebrafish and analyse the importance of the TSGD. The TSGD increased overall synapse proteome complexity. The Post Synaptic Density (PSD) proteome of zebrafish had lower complexity than mammals and a highly conserved set of ~1000 proteins is shared across vertebrates. PSD ultrastructural features were also conserved. Lineage-specific proteome differences indicate vertebrate species evolved distinct synapse types and functions. The datasets are a resource for a wide range of studies and have important implications for the use of zebrafish in modelling human synaptic diseases.
Project description:Using a pooled (n=10) zebrafish liver DNA, we generated base-resolution DNA methylation maps to document epigenetic landscape in zebrafish genome.
Project description:Analysis of the binding sites of Hif-1α in both wild-type and von Hippel Lindau mutant zebrafish lines at 4dpf by ChIP linked next generation sequencing. The von Hippel Lindau mutant displays a systemic hypoxic response under normoxic conditions. Results show the extent of Hif-1α binding to the genome, and provide a basis for analysis of the transcriptional response to genetically induced hypoxia in zebrafish. Analysis of the DNA binding sites of Hif-1α in both wild-type and von Hippel Lindau mutant zebrafish lines at 4dpf. The von Hippel Lindau mutant displays a systemic hypoxic response under normoxic conditions. Results show the extent of Hif-1α binding to the genome, and provide a basis for analysis of the dependency of the transcriptional response on Hif-1α in conditions of genetically induced hypoxia in zebrafish.
Project description:In this study, we have applied ChIP-Seq to identify putative regulatory elements throughout the zebrafish genome. For this purpose we identified sequences within the zebrafish genome that associate with H3K4me1 and H3K4me3, which are epigenetic modifications known to be associated with active cis-regulatory elements in other species.