Degradation of phytochrome interacting factor 3 in phytochrome-mediated light signaling

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Plant photoreceptors regulate various developmental processes. Among the photoreceptors, phytochromes, red and far-red light receptors, regulate light responses through many signaling components, including phytochrome-interacting proteins. The functional relationships among phytochromes and their interacting proteins, however, have not been clearly established. Here, we sought to identify a functional relationship between phytochromes and phytochrome interacting factor 3 (PIF3). We demonstrate that PIF3 is polyubiquitinated rapidly and subsequently degraded in PHYA and PHYB-mediated light signaling. We also show that the degradation of PIF3 is mediated by the 26S proteasome. Our data indicate that light-stimulated phytochromes cause the degradation of their interacting protein, PIF3, by the 26S proteasome.
Publisher
Oxford Univ Press
Issue Date
2004-05
Language
English
Article Type
Article
Keywords

PLANT PHOTORECEPTORS PHYTOCHROME; ARABIDOPSIS SEEDLING DEVELOPMENT; COP9 SIGNALOSOME; TRANSCRIPTION-FACTOR; TRANSDUCTION; PROTEIN; DOMAIN; HY5; PHOTOMORPHOGENESIS; DESTABILIZATION

Citation

PLANT AND CELL PHYSIOLOGY, v.45, no.8, pp.968 - 975

ISSN
0032-0781
DOI
10.1093/pcp/pch125
URI
http://hdl.handle.net/10203/83049
Appears in Collection
BS-Journal Papers(저널논문)
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