dbl-1/TGF-β and daf-12/NHR Signaling Mediate Cell-Nonautonomous Effects of daf-16/FOXO on Starvation-Induced Developmental Arrest
- Award ID(s):
- 1120206
- PAR ID:
- 10042631
- Date Published:
- Journal Name:
- PLOS Genetics
- Volume:
- 11
- Issue:
- 12
- ISSN:
- 1553-7404
- Page Range / eLocation ID:
- e1005731
- Format(s):
- Medium: X
- Sponsoring Org:
- National Science Foundation
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FOXO transcription factors regulate development, longevity, and stress-resistance across species. The C. elegans FOXO ortholog, daf-16, has three major isoforms with distinct promoters and N-termini. Different combinations of isoforms regulate different processes. Adverse environments can induce dauer diapause after the second larval molt. During dauer, daf-16 blocks specification of vulval precursor cells, including EGFR/Ras-mediated 1˚ fate specification and LIN-12/Notch-mediated 2˚ fate specification. Using isoform-specific mutants, we find that daf-16a and daf-16f are functionally redundant for the block to the expression of 1˚ fate markers. In contrast, all three isoforms contribute to blocking the expression of 2˚ fate markers.more » « less
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