Neural-specific elongation of 3′ UTRs during Drosophila development
Copyright policy )Neural-specific elongation of 3′ UTRs during Drosophila development
The 3′ termini of eukaryotic mRNAs influence transcript stability, translation efficiency, and subcellular localization. Here we report that a subset of developmental regulatory genes, enriched in critical RNA-processing factors, exhibits synchronous lengthening of their 3′ UTRs during embryogenesis. The resulting UTRs are up to 20-fold longer than those found on typical Drosophila mRNAs. The large mRNAs emerge shortly after the onset of zygotic transcription, with several of these genes acquiring additional, phased UTR extensions later in embryogenesis. We show that these extended 3′ UTR sequences are selectively expressed in neural tissues and contain putative recognition motifs for the translational repressor, Pumilio, which also exhibits the 3′ lengthening phenomenon documented in this study. These findings suggest a previously unknown mode of posttranscriptional regulation that may contribute to the complexity of neurogenesis or neural function.
- University of California, Berkeley United States
- Research Institute of Molecular Pathology Austria
Embryo, Nonmammalian, Base Sequence, Reverse Transcriptase Polymerase Chain Reaction, Molecular Sequence Data, Gene Expression Regulation, Developmental, RNA-Binding Proteins, Nervous System, DNA-Binding Proteins, Drosophila melanogaster, Animals, Drosophila Proteins, Nucleotide Motifs, 3' Untranslated Regions, In Situ Hybridization, Fluorescence
Embryo, Nonmammalian, Base Sequence, Reverse Transcriptase Polymerase Chain Reaction, Molecular Sequence Data, Gene Expression Regulation, Developmental, RNA-Binding Proteins, Nervous System, DNA-Binding Proteins, Drosophila melanogaster, Animals, Drosophila Proteins, Nucleotide Motifs, 3' Untranslated Regions, In Situ Hybridization, Fluorescence
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