Project description:Nucleosomal chromatin persists in the mature sperm of Drosophila melanogaster. Paternal epigenetic marks of repression and active transcription are found within many genes essential for embryogenesis. These marks are delivered at fertilization and are subsequently maintained in the early embryo.
Project description:In this study we use a combination of proteomics Label-Free quantification methods to monitor protein expression changes over a time course of more than 20 hours of embryo development in Drosophila melanogaster.
Project description:A spectral library was built for Drosophila melanogaster. The spectral library allows reproducible quantification for thousands of peptides per SWATH-MS analysis.
Proteins from Drosophila melanogaster embryo, adult flies were digested with trypsin using in-gel digestion and the peptides were fractionated by high-pH reverse phase chromatography. HRM peptides were spiked into the peptides mixture and each fraction was injected on a Sciex TripleTOF 6600 mass spectrometer fitted with microflow set-up.
The resulting .wiff files were analysed using MaxQuant and Spectronaut.
Project description:Drosophila melanogaster is a well-studied genetic model organism with several large-scale transcriptome resources. Here we investigate 7,952 proteins during the fly life cycle from embryo to adult and also provide a high-resolution temporal time course proteome of 5,458 proteins during embryogenesis. We use our large scale data set to compare transcript/protein expression, uncovering examples of extreme differences between mRNA and protein abundance. In the embryogenesis proteome, the time delay in protein synthesis after transcript expression was determined. For some proteins, including the transcription factor lola, we monitor isoform specific expression levels during early fly development. Furthermore, we obtained firm evidence of 268 small proteins, which are hard to predict by bioinformatics. We observe peptides originating from non-coding regions of the genome and identified Cyp9f3psi as a protein-coding gene. As a powerful resource to the community, we additionally created an interactive web interface (http://www.butterlab.org) advancing the access to our data.
Project description:Drosophila melanogaster is a well-studied genetic model organism with several large-scale transcriptome resources. Here we investigate 7,952 proteins during the fly life cycle from embryo to adult and also provide a high-resolution temporal time course proteome of 5,458 proteins during embryogenesis. We use our large scale data set to compare transcript/protein expression, uncovering examples of extreme differences between mRNA and protein abundance. In the embryogenesis proteome, the time delay in protein synthesis after transcript expression was determined. For some proteins, including the transcription factor lola, we monitor isoform specific expression levels during early fly development. Furthermore, we obtained firm evidence of 268 small proteins, which are hard to predict by bioinformatics. We observe peptides originating from non-coding regions of the genome and identified Cyp9f3psi as a protein-coding gene. As a powerful resource to the community, we additionally created an interactive web interface (http://www.butterlab.org) advancing the access to our data.