Drosophila melanogaster
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA268841 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| SRR1665030.fastq.gz | Fastqsanger.gz | |||
| SRR1665040.fastq.gz | Fastqsanger.gz | |||
| SRR1665031.fastq.gz | Fastqsanger.gz | |||
| SRR1665041.fastq.gz | Fastqsanger.gz | |||
| SRR1665032.fastq.gz | Fastqsanger.gz |
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Project description:In Drosophila, fibrillar flight muscles (IFMs) enable flight, while tubular muscles mediate other body movements. Here, we use RNA-sequencing and isoform-specific reporters to show that spalt major (salm) determines fibrillar muscle physiology by regulating transcription and alternative splicing of a large set of sarcomeric proteins. We identify the RNA binding protein Arrest (Aret, Bruno) as downstream of salm. Aret shuttles between cytoplasm and nuclei, and is essential for myofibril maturation and sarcomere growth of IFMs. Molecularly, Aret regulates IFM-specific transcription and splicing of various sarcomeric targets, including Stretchin and wupA (TnI), and thus maintains muscle fiber integrity. As Aret and its sarcomeric targets are evolutionarily conserved, similar principles may regulate mammalian muscle morphogenesis.
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Project description:To complement our existing data on developmental gene expression changes in flight muscle (IFM) development in Drosophila (GSE107247, GSE63707), we performed mRNA-Seq on dissected leg samples at three stages during pupal development (30, 50 and 72h APF). We further sequenced an additional timepoint at 24h APF for RNAi knockdown of aret (Bru1) in flight muscle. Comparison of splicing and expression profiles of sarcomeric genes allowed us to identify muscle-type specific differences in gene and isoform expression between fibrillar flight muscle and tubular leg muscle. We can further trace the dynamics of exon usage in sarcomere genes across the developmental timecourse, allowing us to identify events the switch during muscle differentiation and maturation.
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