PlantTFDB
PlantRegMap/PlantTFDB v5.0
Plant Transcription Factor Database
Musa acuminata
SBP Family
Species TF ID Description
GSMUA_Achr10P02970_001SBP family protein
GSMUA_Achr10P06210_001SBP family protein
GSMUA_Achr10P23280_001SBP family protein
GSMUA_Achr11P19580_001SBP family protein
GSMUA_Achr1P08440_001SBP family protein
GSMUA_Achr2P01820_001SBP family protein
GSMUA_Achr2P03070_001SBP family protein
GSMUA_Achr2P06150_001SBP family protein
GSMUA_Achr2P11940_001SBP family protein
GSMUA_Achr3P00810_001SBP family protein
GSMUA_Achr3P05360_001SBP family protein
GSMUA_Achr3P09190_001SBP family protein
GSMUA_Achr3P11170_001SBP family protein
GSMUA_Achr3P23780_001SBP family protein
GSMUA_Achr3P24520_001SBP family protein
GSMUA_Achr3P27750_001SBP family protein
GSMUA_Achr4P01450_001SBP family protein
GSMUA_Achr4P03880_001SBP family protein
GSMUA_Achr4P05720_001SBP family protein
GSMUA_Achr4P12470_001SBP family protein
GSMUA_Achr4P16050_001SBP family protein
GSMUA_Achr4P20590_001SBP family protein
GSMUA_Achr4P23650_001SBP family protein
GSMUA_Achr4P24610_001SBP family protein
GSMUA_Achr4P26940_001SBP family protein
GSMUA_Achr4P28960_001SBP family protein
GSMUA_Achr5P13440_001SBP family protein
GSMUA_Achr5P21990_001SBP family protein
GSMUA_Achr5P22250_001SBP family protein
GSMUA_Achr5P22630_001SBP family protein
GSMUA_Achr5P25090_001SBP family protein
GSMUA_Achr5P26880_001SBP family protein
GSMUA_Achr5P27280_001SBP family protein
GSMUA_Achr6P06030_001SBP family protein
GSMUA_Achr6P22280_001SBP family protein
GSMUA_Achr6P27520_001SBP family protein
GSMUA_Achr6P36010_001SBP family protein
GSMUA_Achr7P02020_001SBP family protein
GSMUA_Achr7P02710_001SBP family protein
GSMUA_Achr7P05010_001SBP family protein
GSMUA_Achr7P08750_001SBP family protein
GSMUA_Achr7P20510_001SBP family protein
GSMUA_Achr7P20620_001SBP family protein
GSMUA_Achr7P22940_001SBP family protein
GSMUA_Achr8P23820_001SBP family protein
GSMUA_Achr8P25550_001SBP family protein
GSMUA_Achr9P01380_001SBP family protein
GSMUA_Achr9P14160_001SBP family protein
GSMUA_Achr9P17440_001SBP family protein
GSMUA_Achr9P20220_001SBP family protein
GSMUA_Achr9P20230_001SBP family protein
GSMUA_Achr9P22260_001SBP family protein
GSMUA_Achr9P23140_001SBP family protein
GSMUA_Achr9P27660_001SBP family protein
GSMUA_Achr9P29330_001SBP family protein
GSMUA_AchrUn_randomP05850_001SBP family protein
GSMUA_AchrUn_randomP08380_001SBP family protein
GSMUA_AchrUn_randomP21900_001SBP 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