Plant Transcription Factor Database
Previous version: v3.0
Brassica rapa
BBR-BPC Family
Species TF ID Description
XP_009101921.1BBR-BPC family protein
XP_009104251.1BBR-BPC family protein
XP_009109516.1BBR-BPC family protein
XP_009110521.1BBR-BPC family protein
XP_009110522.1BBR-BPC family protein
XP_009110523.1BBR-BPC family protein
XP_009116701.1BBR-BPC family protein
XP_009116702.1BBR-BPC family protein
XP_009116703.1BBR-BPC family protein
XP_009116704.1BBR-BPC family protein
XP_009116705.1BBR-BPC family protein
XP_009116706.1BBR-BPC family protein
XP_009117885.1BBR-BPC family protein
XP_009117886.1BBR-BPC family protein
XP_009127598.1BBR-BPC family protein
XP_009133026.1BBR-BPC family protein
XP_009137623.1BBR-BPC family protein
XP_009138239.1BBR-BPC family protein
XP_009138854.1BBR-BPC family protein
XP_009138855.1BBR-BPC family protein
XP_009138856.1BBR-BPC family protein
XP_009138857.1BBR-BPC family protein
XP_009138858.1BBR-BPC family protein
XP_009138859.1BBR-BPC family protein
XP_009138860.1BBR-BPC family protein
XP_009138877.1BBR-BPC family protein
XP_009139486.1BBR-BPC family protein
XP_009140266.1BBR-BPC family protein
XP_009148851.1BBR-BPC family protein
XP_009148852.1BBR-BPC family protein
BBR/BPC Family Introduction

We identified BASIC PENTACYSTEINE1 (BPC1) as a regulator of the homeotic Arabidopsis thaliana gene SEEDSTICK (STK), which controls ovule identity, and characterized its mechanism of action. A combination of tethered particle motion analysis and electromobility shift assays revealed that BPC1 is able to induce conformational changes by cooperative binding to purine-rich elements present in the STK regulatory sequence. Analysis of STK expression in the bpc1 mutant showed that STK is upregulated. Our results give insight into the regulation of gene expression in plants and provide the basis for further studies to understand the mechanisms that control ovule identity in Arabidopsis.

Kooiker M, Airoldi CA, Losa A, Manzotti PS, Finzi L, Kater MM, Colombo L.
BASIC PENTACYSTEINE1, a GA binding protein that induces conformational changes in the regulatory region of the homeotic Arabidopsis gene SEEDSTICK.
Plant Cell. 2005 Mar;17(3):722-9. Epub 2005 Feb 18.
PMID: 15722463

BBR is nuclear targeted and is a characterized nuclear localization signal (NLS) sequence, a DNA-binding domain extended up to 90 aa at the C-terminus and a putative N-terminal activation domain. The corresponding gene has no introns and is ubiquitously expressed in barley tissues. In co-transfection experiments, BBR activates (GA/TC)8-containing promoters, and its overexpression in tobacco leads to a pronounced leaf shape modification. BBR has properties of a GAGA-binding factor, but the corresponding gene has no sequence homology to Trl and Psq of Drosophila, which encode functionally analogous proteins. In Arabidopsis, (GA/TC)8 repeats occur particularly within 1500 bp upstream of gene start codons included in some homeodomain genes of different classes. The data presented suggest that expression of the barley BKn3 is regulated, at least in part, by the binding of the transcription factor BBR to GA/TC repeats.

Santi L, Wang Y, Stile MR, Berendzen K, Wanke D, Roig C, Pozzi C, Muller K, Muller J, Rohde W, Salamini F.
The GA octodinucleotide repeat binding factor BBR participates in the transcriptional regulation of the homeobox gene Bkn3.
Plant J, 2003. 34(6): p. 813-26.
PMID: 12795702