Santi et al. (2003): The barley b recombinant (BBR) protein binds specifically to the (GA/TC)8 repeat. 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.


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


Class: TF
Number of species containing the TAP: 93
Number of available proteins: 556

The colour code corresponds to the rules for the domains:

should be contained
should not be contained

Domain rules:

(Domain names are clickable)

Phylogenetic tree for Archeaplastida:

To view the tree click here.

TAP distribution:

The following table shows the distribution of BBR/BPC over all species included in TAPscan. The values for e.g. a specific kingdom are shown in the tree below if you expand the tree for that kingdom.

Minimum Maximum Average Median Standard deviation

List of species containing BBR/BPC sorted by kingdomcladesupergrouporderfamily:

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expand kingdom Archaeplastida (565 proteins in 93 species)
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A list of species letter codes included in the protein names can be found here (opens in new tab).