Mechanism of early light signaling by the carboxy-terminal output module of Arabidopsis phytochrome B

Abstract

Plant phytochromes mediate the degradation of PIF transcription factors to transduce light signaling. Here, contrary to previous models, Qiu et al. show that degradation of PIF3 does not require the N-terminal photosensory module of PHYB but can instead be mediated by the C-terminal output module.