Function
Positive regulator of brassinosteroid (BR) signaling. Transcription factor that activates target gene expression by binding specifically to the DNA sequence 5'-CANNTG-3'(E box) through its N-terminal domain. Can bind individually to the promoter as a homodimer or synergistically as a heterodimer with BIM1, BIM2 or BIM3. The C-terminal domain is probably involved in transcriptional activation (PubMed:12007405, PubMed:15680330, PubMed:18467490, PubMed:19170933). Recruits the transcription elongation factor IWS1 to control BR-regulated gene expression (PubMed:20139304). Forms a trimeric complex with IWS1 and ASHH2/SDG8 to regulate BR-regulated gene expression (PubMed:24838002). Promotes quiescent center (QC) self-renewal by cell divisions in the primary root. Binds to the E-boxes of the BRAVO promoter to repress its expression (PubMed:24981610).
Sequence
MTSDGATSTSAAAAAAAMATRRKPSWRERENNRRRERRRRAVAAKIYTGLRAQGNYNLPKHCDNNEVLKALCSEAGWVVEEDGTTYRKGHKPLPGDMAGSSSRATPYSSHNQSPLSSTFDSPILSYQVSPSSSSFPSPSRVGDPHNISTIFPFLRNGGIPSSLPPLRISNSAPVTPPVSSPTSRNPKPLPTWESFTKQSMSMAAKQSMTSLNYPFYAVSAPASPTHHRQFHAPATIPECDESDSSTVDSGHWISFQKFAQQQPFSASMVPTSPTFNLVKPAPQQLSPNTAAIQEIGQSSEFKFENSQVKPWEGERIHDVAMEDLELTLGNGKAHS