| Citation | Tepper RG, Ashraf J, Kaletsky R, Kleemann G, Murphy CT, Bussemaker HJ. PQM-1 complements DAF-16 as a key transcriptional regulator of DAF-2-mediated development and longevity. Cell, 2013. |
| PubMed ID | 23911329 |
| Short Description | PQM-1 complements DAF-16 as a key transcriptional regulator of DAF-2-mediated development and longevity. GEO Record: N.A. Platform: N.A. Download gene-centric, log2 transformed data: WBPaper00044005.ce.mr.csv |
| # of Conditions | 1 |
Full Description
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Reduced insulin/IGF-1-like signaling (IIS) extends C.elegans lifespan by upregulating stress response (class I) and downregulating other (class II) genes through a mechanism that depends on the conserved transcription factor DAF-16/FOXO. By integrating genome-wide mRNA expression responsiveness to DAF-16 with genome-wide invivo binding data for a compendium of transcription factors, we discovered that PQM-1 is the elusive transcriptional activator that directly controls development (class II) genes by binding to the DAF-16-associated element (DAE). DAF-16 directly regulates class I genes only, through the DAF-16-binding element (DBE). Loss of PQM-1 suppresses daf-2 longevity and further slows development. Surprisingly, the nuclear localization of PQM-1 and DAF-16 is controlled by IIS in opposite ways and was also found to be mutually antagonistic. We observe progressive loss of nuclear PQM-1 with age, explaining declining expression of PQM-1 targets. Together, our data suggest an elegant mechanism for balancing stress response and development. Experimental Details: WBPaper00044005:pqm-1(ok485)_vs_N2. |
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