Protein Brassinazole-Resistant 2 (BZR2) Arabidopsis Thaliana Recombinant Protein

Encodes brassinosteroid (BR) signalling protein that accumulates in the nucleus as dephosphorylated form in response to BRs. Is phosphorylated by the BIN2 GSK3 kinase. It synergistically interacts with BIM1 to bind to E box sequences (CANNTG). The protein contains a nuclear localization signal (NLS), followed by a highly conserved amino-terminal domain (N) shared by all family members, a BIN2 phosphorylation domain (P), a PEST motif, involved in protein degradation in the absence of BR, and a carboxyl-terminal domain. BES1 can interact with the ELF6 and REF6 Jumonji N/C-domain containing proteins and may direct them to modify histone methylation upstream of some brassinosteroid responsive-genes. Works with BRAVO to regulate QC division in the root.

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).