LWD–TCP complex activates the morning gene CCA1 in Arabidopsis

Abstract

TheArabidopsisCCA1 transcription factor is a core regulator of the circadian clock. Here, the authors show that the LWD1 protein, in complex with the TCP20 or TCP22 transcription factors, acts as a co-activator of CCA1 expression contributing to elevated CCA1 expression at dawn.