Nucl. Acids Res.-2016-Jones-267-80.pdf (7.54 MB)
RNA-seq reveals post-transcriptional regulation of Drosophila insulin-like peptide dilp8 and the neuropeptide-like precursor Nplp2 by the exoribonuclease Pacman/XRN1
journal contribution
posted on 2023-06-08, 23:57 authored by Chris JonesChris Jones, Amy L Pashler, Benjamin P Towler, Sophie R Robinson, Sarah NewburySarah NewburyRibonucleases are critically important in many cellular and developmental processes and defects in their expression are associated with human disease. Pacman/XRN1 is a highly conserved cytoplasmic exoribonuclease which degrades RNAs in a 5' - 3' direction. In Drosophila, null mutations in pacman result in small imaginal discs, a delay in onset of pupariation and lethality during the early pupal stage. In this paper, we have used RNA-seq in a genome-wide search for mRNAs misregulated in pacman null wing imaginal discs. Only 4.2% of genes are misregulated ±>2-fold in pacman null mutants compared to controls, in line with previous work showing that Pacman has specificity for particular mRNAs. Further analysis of the most upregulated mRNAs showed that Pacman post-transcriptionally regulates the expression of the secreted insulin-like peptide Dilp8. Dilp8 is related to human IGF-1, and has been shown to co-ordinate tissue growth with developmental timing in Drosophila. The increased expression of Dilp8 is consistent with the developmental delay seen in pacman null mutants. Our analysis, together with our previous results, show that the normal role of this exoribonuclease in imaginal discs is to suppress the expression of transcripts that are crucial in apoptosis and growth control during normal development.
Funding
Studentship - Robinson; WC003-14; BSMS; WC003-14
Studentship - Towler; WC003-11; BSMS; WC003-11
Epigenetic regulation of gene expression by the exoribonuclease pacman; G0056; BBSRC-BIOTECHNOLOGY & BIOLOGICAL SCIENCES RESEARCH COUNCIL; BB/I021345/1
History
Publication status
- Published
File Version
- Published version
Journal
Nucleic Acids ResearchISSN
0305-1048Publisher
Oxford University PressExternal DOI
Issue
1Volume
44Page range
267-280Department affiliated with
- Clinical and Experimental Medicine Publications
Full text available
- Yes
Peer reviewed?
- Yes
Legacy Posted Date
2016-01-12First Open Access (FOA) Date
2016-01-12First Compliant Deposit (FCD) Date
2016-01-12Usage metrics
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