2014
DOI: 10.1126/science.1250778
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A mutually assured destruction mechanism attenuates light signaling in Arabidopsis

Abstract: Following light-induced nuclear translocation, phytochrome photoreceptors interact with and induce rapid phosphorylation and degradation of bHLH transcription factors, such as PHYTOCHROME-INTERACTING FACTOR 3 (PIF3), to regulate gene expression. Concomitantly this interaction triggers feedback reduction of phytochrome B (phyB) levels. Light-induced phosphorylation of PIF3 is necessary for the degradation of both proteins. We report that this PIF3 phosphorylation induces, and is necessary for, recruitment of LR… Show more

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Cited by 236 publications
(299 citation statements)
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“…7). These data suggest that, unlike PIF3 and phyB 23 , PIF1 and phyA may not be co-degraded through the CUL4 COP1-SPA E3 ubiquitin ligase complexes.…”
Section: Cop1mentioning
confidence: 89%
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“…7). These data suggest that, unlike PIF3 and phyB 23 , PIF1 and phyA may not be co-degraded through the CUL4 COP1-SPA E3 ubiquitin ligase complexes.…”
Section: Cop1mentioning
confidence: 89%
“…Plates were wrapped in aluminium foil at 21°C for 6 days in the dark before being The relative abundance of PIF1 and PIF3 levels in cop1 and spa mutants also highlights the differences in the mechanisms of PIF regulation. PIF3 has been shown to be unstable in the cop1-4 and spa123 triple-mutant backgrounds in the dark 23,24,31 , suggesting that COP1 and SPA proteins are necessary for the stability of PIF3 in the dark. In contrast, while PIF1 level is also lower in cop1-4 compared with wild type, PIF1 is much more abundant in the spaQ mutants compared with wild type in the dark (Fig.…”
Section: Discussionmentioning
confidence: 99%
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