Project description:RNAseq analysis of the abdominal distal tip of four Drosophila species (Drosophila suzukii, Drosophila subpulchrella, Drosophila biarmipes and Drosophila melanogaster)
Project description:The loss of discrete morphological traits, the most common evolutionary transition, is typically driven by changes in expression of developmental genes. Mutations accumulating in regulatory elements of these genes can disrupt DNA binding sites for transcription factors patterning their spatial expression, or delete entire enhancers. Regulatory elements, however, may in principle be silenced through other mechanisms, including changes in chromatin accessibility, or the emergence of repressive elements. Here, we show that an increase in chromatin accessibility at the pigmentation gene yellow, combined with the gain of a repressor site, underlie the evolutionary loss of a spot pigmentation pattern on the wings of a Drosophila species. The evolutionary gain of accessibility of this repressive element is regulated by E93, a transcription factor governing the progress of metamorphosis. This convoluted evolutionary scenario contrasts with the classical parsimonious mutational paths generally envisioned and often documented for morphological losses. It illustrates for the first time how evolutionary changes in chromatin accessibility may directly contribute to morphological diversification. We profiled chromatin accessibility at selected stages in the pupal wings of D. melanogaster and D. biarmipes using ATAC-seq.
Project description:Mapping H3K9ac, H3K18ac and H3K27ac during Drosophila zygotic genome activation Mapping Gcn5 and Nejire in catalytic wild-type or catalytic dead rescue of Gcn5KD and NejireKD during Drosophila zygotic genome activation
Project description:Cmi (also known as Lpt) is the PHD finger domain-containing subunit of the Drosophila MLR COMPASS (Cmi-Trr) complex. ChIP-seq analysis of Cmi at different stages of Drosophila development suggests dynamic genome localization of the Cmi/MLR complex on enhancers and promoters during Drosophila development.
Project description:We profiled the genome wide binding of the Ubx protein in Drosophila halteres and identified its direct targets. Analysis of genome wide binding of Ubx helped us identify the role of high affinity motifs in target selection as well as Ubx mediated regulation of target genes in Drosophila halteres.
Project description:We have identified the protein binders of functionally distinct promoters from the Drosophila melanogaster genome using nuclear extracts prepared from Schneider S2 cells