PlantTFDB
PlantRegMap/PlantTFDB v5.0
Plant Transcription Factor Database
Previous version: v3.0 v4.0
Triticum dicoccoides
SBP Family
Species TF ID Description
TRIDC1AG038160.1SBP family protein
TRIDC1AG038160.2SBP family protein
TRIDC1AG038160.3SBP family protein
TRIDC1AG038160.4SBP family protein
TRIDC1AG038160.5SBP family protein
TRIDC1BG043410.3SBP family protein
TRIDC1BG043410.4SBP family protein
TRIDC2AG030380.2SBP family protein
TRIDC2AG059730.2SBP family protein
TRIDC2AG059730.3SBP family protein
TRIDC2AG059730.4SBP family protein
TRIDC2AG070620.1SBP family protein
TRIDC2AG070620.2SBP family protein
TRIDC2AG070620.3SBP family protein
TRIDC2BG034150.1SBP family protein
TRIDC2BG063080.1SBP family protein
TRIDC2BG063080.2SBP family protein
TRIDC2BG063080.3SBP family protein
TRIDC2BG063080.4SBP family protein
TRIDC2BG076330.2SBP family protein
TRIDC2BG076330.3SBP family protein
TRIDC2BG076330.4SBP family protein
TRIDC2BG076330.5SBP family protein
TRIDC3AG061260.1SBP family protein
TRIDC3AG061260.2SBP family protein
TRIDC3AG061260.3SBP family protein
TRIDC3AG061260.4SBP family protein
TRIDC3AG061260.5SBP family protein
TRIDC3BG068940.1SBP family protein
TRIDC3BG068940.2SBP family protein
TRIDC3BG068940.3SBP family protein
TRIDC3BG068940.4SBP family protein
TRIDC4AG053710.1SBP family protein
TRIDC4AG053710.2SBP family protein
TRIDC4AG053710.5SBP family protein
TRIDC4AG053710.6SBP family protein
TRIDC4AG053710.7SBP family protein
TRIDC4AG053710.8SBP family protein
TRIDC5AG019810.1SBP family protein
TRIDC5AG042970.1SBP family protein
TRIDC5AG042970.2SBP family protein
TRIDC5AG042970.3SBP family protein
TRIDC5AG042970.4SBP family protein
TRIDC5BG043980.1SBP family protein
TRIDC5BG046850.2SBP family protein
TRIDC5BG046850.3SBP family protein
TRIDC5BG046850.4SBP family protein
TRIDC5BG076500.1SBP family protein
TRIDC5BG076500.2SBP family protein
TRIDC5BG076500.4SBP family protein
TRIDC5BG076500.6SBP family protein
TRIDC6AG014380.1SBP family protein
TRIDC6AG014380.2SBP family protein
TRIDC6AG014380.3SBP family protein
TRIDC6AG014380.4SBP family protein
TRIDC6AG014380.5SBP family protein
TRIDC6AG014380.6SBP family protein
TRIDC6AG014380.7SBP family protein
TRIDC6AG021720.2SBP family protein
TRIDC6AG021720.5SBP family protein
TRIDC6BG019820.1SBP family protein
TRIDC6BG019820.2SBP family protein
TRIDC6BG019820.3SBP family protein
TRIDC6BG019820.4SBP family protein
TRIDC6BG027420.2SBP family protein
TRIDC6BG027420.3SBP family protein
TRIDC7AG026190.14SBP family protein
TRIDC7AG026190.16SBP family protein
TRIDC7AG026190.3SBP family protein
TRIDC7AG031600.1SBP family protein
TRIDC7AG031600.2SBP family protein
TRIDC7AG031600.3SBP family protein
TRIDC7AG032020.2SBP family protein
TRIDC7AG032020.4SBP family protein
TRIDC7AG032020.5SBP family protein
TRIDC7AG069100.1SBP family protein
TRIDC7AG069120.1SBP family protein
TRIDC7AG069150.1SBP family protein
TRIDC7AG069170.1SBP family protein
TRIDC7BG016800.3SBP family protein
TRIDC7BG022390.1SBP family protein
TRIDC7BG022390.2SBP family protein
TRIDC7BG022390.3SBP family protein
TRIDC7BG022390.5SBP family protein
TRIDC7BG022920.1SBP family protein
TRIDC7BG022920.2SBP family protein
TRIDC7BG025060.1SBP family protein
TRIDC7BG025060.2SBP family protein
TRIDC7BG025060.3SBP family protein
TRIDC7BG025060.4SBP family protein
TRIDC7BG063530.1SBP family protein
TRIDC7BG063530.2SBP family protein
TRIDC7BG063560.1SBP family protein
TRIDC7BG063560.2SBP family protein
TRIDC7BG063560.3SBP family protein
SBP Family Introduction

SQUAMOSA promoter binding proteins (SBPs) form a major family of plant-specific transcription factors related to flower development. Although SBPs are heterogeneous in primary structure, they share a highly conserved DNA-binding domain (DBD) that has been suggested to be zinc binding. Here we report the NMR solution structures of DBDs of two SBPs of Arabidopsis thaliana, SPL4 and SPL7. The two share essentially the same structural features. Each structure contains two zinc-binding sites consisting of eight Cys or His residues in a Cys3HisCys2HisCys or Cys6HisCys sequence motif in which the first four residues coordinate to one zinc and the last four coordinate to the other. These structures are dissimilar to other known zinc-binding structures, and thus represent a novel type of zinc-binding motif. The electrostatic profile on the surface suggested that a continuous region, including all the conserved basic residues, is involved in the DNA binding, the mode of which is likely to be novel as well.

Yamasaki K, Kigawa T, Inoue M, Tateno M, Yamasaki T, Yabuki T, Aoki M, Seki E, Matsuda T, Nunokawa E, Ishizuka Y, Terada T, Shirouzu M, Osanai T, Tanaka A, Seki M, Shinozaki K, Yokoyama S.
A novel zinc-binding motif revealed by solution structures of DNA-binding domains of Arabidopsis SBP-family transcription factors
J Mol Biol. 2004 Mar 12;337(1):49-63.
PMID: 15001351

SBP-box genes were first characterized as SQUAMOSA promoter binding proteins (SBPs) to regulate the expression of MADS-box genes in early flower development of A. majus (Klein et al., 1996). Since then, SBP-box genes have been identified in many plants including green alga, moss, silver birch, A. majus, Arabidopsis and maize. They play critical roles in regulating flower and fruit development as well as other physiological processes ([Moreno et al., 1997],[Eriksson et al., 2004], [Lannenpaa et al., 2004], [Arazi et al., 2005] and [Kropat et al., 2005]). It has been reported that Arabidopsis SPL3, SPL8 and SPL14 involves in flowering, sporogenesis, GA signaling and toxin resistance ([Cardon et al., 1997], [Unte et al., 2003], [Stone et al., 2005] and [Zhang et al., 2006]) while maize tga1 and tomato LeSPL-CNR affect fruit development ([Wang et al., 2005a] and [Manning et al., 2006]).

SBP-box genes encode proteins sharing a conserved DNA-binding domain of 79 amino acid residues. It has been proved that the DNA-binding domain of SBP-box genes is necessary and sufficient to bind to a palindromic GTAC core motif ([Klein et al., 1996], [Cardon et al., 1997], [Cardon et al., 1999], [Lannenpaa et al., 2004] and [Birkenbihl et al., 2005]). Studies on the NMR solution structure of the fragment of Arabidopsis SPL4 and SPL7 revealed that the DNA-binding domain of SBPs consisted of two separate zinc-binding sites. One zinc finger is C3H or C4 and the other is C2HC (Yamasaki et al., 2004 K. Yamasaki et al.,).

Guo AY, Zhu QH, Gu X, Ge S, Yang J, Luo J.
Genome-wide identification and evolutionary analysis of the plant specific SBP-box transcription factor family.
Gene. 2008 Jul 15;418(1-2):1-8.
PMID: 18495384