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DAF-16 Target Genes That Control C. elegans Life-Span and Metabolism
Siu Sylvia Lee,1
Scott Kennedy,1
Andrew C. Tolonen,2
Gary Ruvkun1*
Abstract:
Signaling from the DAF-2/insulin receptor to the DAF-16/FOXOtranscription factor controls longevity, metabolism, and developmentin disparate phyla. To identify genes that mediate the conservedbiological outputs of daf-2/insulin-like signaling, we usedcomparativegenomics to identify 17 orthologous genes from Caenorhabditisand Drosophila, each of which bears a DAF-16 binding site inthe promoter region. One-third of these DAF-16 downstream candidategenes were regulatedby daf-2/insulin-like signaling in C. elegans,and RNA interference inactivation of the candidates showed thatmany of these genes mediate distinct aspects of daf-16 function,including longevity, metabolism, anddevelopment.
1 Department of Molecular Biology, Massachusetts General Hospital, Department of Genetics, Harvard Medical School, 50 Blossom Street, Boston, MA 02114, USA. 2 Department of Biology, Massachusetts Institute of Technology, 15 Vassar Street, Building 48-424, Cambridge, MA 02139, USA.
* To whom correspondence should be addressed. E-mail: ruvkun{at}molbio.mgh.harvard.edu
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