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

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Title
Degradation of phytochrome interacting factor 3 in phytochrome-mediated light signaling
Author(s)
E Park; J Kim; Y Lee; J Shin; E Oh; W I Chung; Jang Ryol Liu; G Choi
Bibliographic Citation
Plant and Cell Physiology, vol. 136, no. 8, pp. 968-975
Publication Year
2004
Abstract
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.
Keyword
ArabidopsisDegradationPhytochromePIF3Ubiquitination
ISSN
0032-0781
Publisher
Oxford Univ Press
DOI
http://dx.doi.org/10.1093/pcp/pch125
Type
Article
Appears in Collections:
1. Journal Articles > Journal Articles
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