Shohei Nosaki, Nobutaka Mitsuda, Shingo Sakamoto, Kazuki Kusubayashi, Ayumi Yamagami, Yuqun Xu, Thi Bao Chau Bui, Tohru Terada, Kenji Miura, Takeshi Nakano, Masaru Tanokura, Takuya Miyakawa
BRZ-INSENSITIVE-LONG 1 (BIL1)/BRASSINAZOLE-RESISTANT 1 (BZR1) and its homologues are plant-specific transcription factors that convert the signalling of the phytohormones brassinosteroids (BRs) to transcriptional responses, thus controlling various physiological processes in plants. Although BIL1/BZR1 upregulates some BR-responsive genes and downregulates others, the molecular mechanism underlying the dual roles of BIL1/BZR1 is still poorly understood. Here we show that BR-responsive transcriptional repression by BIL1/BZR1 requires the tight binding of BIL1/BZR1 alone to the 10 bp elements of DNA fragments containing the known 6 bp core-binding motifs at the centre...
December 15, 2022: Nature Plants