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Dec
28
Drosophila melanogaster is an important non-mammalian model system that has had a critical role in basic biological discoveries, such as identifying chromosomes as the carriers of genetic information and uncovering the role of genes in development. However, despite the fact that Drosophila melanogaster is one of the most well studied genetic model organisms, its genome still contains unannotated coding and non-coding genes, transcripts, exons and RNA editing sites.
Full discovery and annotation are pre-requisites for understanding how the regulation of transcription, splicing and RNA editing directs the development of this complex organism. So the authors set out to provide a high-resolution view of transcriptome dynamics throughout development and used RNA-Seq, tiling microarrays and cDNA sequencing to explore the transcriptome in 30 distinct developmental stages
They identified 111,195 new elements, including thousands of genes, coding and non-coding transcripts, exons, splicing and editing events, and inferred protein isoforms that previously eluded discovery using established experimental, prediction and conservation-based approaches. These data substantially expand the number of known transcribed elements in the Drosophila genome.
Graveley BR, Brooks AN, Carlson JW, Duff MO, Landolin JM, Yang L, Artieri CG, van Baren MJ, Boley N, Booth BW, Brown JB, Cherbas L, Davis CA, Dobin A, Li R, Lin W, Malone JH, Mattiuzzo NR, Miller D, Sturgill D, Tuch BB, Zaleski C, Zhang D, Blanchette M, Dudoit S, Eads B, Green RE, Hammonds A, Jiang L, Kapranov P, Langton L, Perrimon N, Sandler JE, Wan KH, Willingham A, Zhang Y, Zou Y, Andrews J, Bickel PJ, Brenner SE, Brent MR, Cherbas P, Gingeras TR, Hoskins RA, Kaufman TC, Oliver B, Celniker SE. (2010) The developmental transcriptome of Drosophila melanogaster. Nature [Epub ahead of print]. [abstract]
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Daines B, Wang H, Wang L, Li Y, Han Y, Emmert D, Gelbart W, Wang X, Li W, Gibbs R, Chen R. (2010) The Drosophila melanogaster transcriptome by paired-end RNA sequencing. Genome Res [Epub ahead of print].
This is a very interesting paper….although i was kind of confused in understanding how spatially and temporally expressed transcriptomes can be identified by this approach and again what could be the possible reasons of Drosophila transcriptome being more compact than other species.
Great work!