Arabidopsis PHYTOCHROME INTERACTING FACTOR Proteins Promote Phytochrome B Polyubiquitination by COP1 E3 Ligase in the Nucleus[C][W]

摘要

This work identifies COP1 as the ubiquitin E3 ligase for not only phytochrome B but also other members of the stable phytochrome family and shows that PIF transcription factors enhance phyB ubiquitination by COP1 in vitro. It provides a molecular mechanism for the termination of red light signal transduction.