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Title 

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

Authors 

E ParkJ KimY LeeJ ShinE OhW I ChungJang Ryol LiuG Choi

Publisher 

Oxford University Press (OUP)

Issue Date 

2004

Citation 

Plant and Cell Physiology, vol. 136, no. 8, pp. 968-975

Keywords 

arabidopsisdegradationphytochromePIF3ubiquitinationbasic helix loop helix transcription factorPIF3 protein, arabidopsislightbasic helix-loop-helix transcription factors

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.

ISSN 

0032-0781

Appears in Collections

1. Journal Articles > Journal Articles

Registered Date

2019-05-02


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