University of Sussex
Browse
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

Download (7.54 MB)
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 Newbury
Ribonucleases 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 Research

ISSN

0305-1048

Publisher

Oxford University Press

Issue

1

Volume

44

Page range

267-280

Department affiliated with

  • Clinical and Experimental Medicine Publications

Full text available

  • Yes

Peer reviewed?

  • Yes

Legacy Posted Date

2016-01-12

First Open Access (FOA) Date

2016-01-12

First Compliant Deposit (FCD) Date

2016-01-12

Usage metrics

    University of Sussex (Publications)

    Categories

    No categories selected

    Licence

    Exports

    RefWorks
    BibTeX
    Ref. manager
    Endnote
    DataCite
    NLM
    DC