PlantTFDB
Plant Transcription Factor Database
v4.0
Previous version: v1.0, v2.0, v3.0
Brachypodium distachyon
M-type_MADS Family
Species TF ID Description
Bradi1g15482.1.pM-type_MADS family protein
Bradi1g20090.1.pM-type_MADS family protein
Bradi1g25297.2.pM-type_MADS family protein
Bradi1g25300.1.pM-type_MADS family protein
Bradi1g27901.1.pM-type_MADS family protein
Bradi1g39927.1.pM-type_MADS family protein
Bradi1g46675.1.pM-type_MADS family protein
Bradi1g55041.1.pM-type_MADS family protein
Bradi1g55051.1.pM-type_MADS family protein
Bradi1g57410.3.pM-type_MADS family protein
Bradi1g57422.1.pM-type_MADS family protein
Bradi1g57870.1.pM-type_MADS family protein
Bradi1g57875.2.pM-type_MADS family protein
Bradi1g58100.3.pM-type_MADS family protein
Bradi1g70942.1.pM-type_MADS family protein
Bradi2g10745.1.pM-type_MADS family protein
Bradi2g11145.1.pM-type_MADS family protein
Bradi2g11156.1.pM-type_MADS family protein
Bradi2g11163.1.pM-type_MADS family protein
Bradi2g12566.1.pM-type_MADS family protein
Bradi2g26320.1.pM-type_MADS family protein
Bradi2g30530.1.pM-type_MADS family protein
Bradi2g33456.1.pM-type_MADS family protein
Bradi2g36774.1.pM-type_MADS family protein
Bradi2g36778.1.pM-type_MADS family protein
Bradi2g36782.1.pM-type_MADS family protein
Bradi2g37111.1.pM-type_MADS family protein
Bradi2g38695.1.pM-type_MADS family protein
Bradi2g42233.1.pM-type_MADS family protein
Bradi2g43290.1.pM-type_MADS family protein
Bradi2g58503.1.pM-type_MADS family protein
Bradi2g59119.1.pM-type_MADS family protein
Bradi2g59119.2.pM-type_MADS family protein
Bradi2g59191.1.pM-type_MADS family protein
Bradi2g62515.1.pM-type_MADS family protein
Bradi3g04880.1.pM-type_MADS family protein
Bradi3g18670.2.pM-type_MADS family protein
Bradi3g39177.1.pM-type_MADS family protein
Bradi3g39575.1.pM-type_MADS family protein
Bradi3g41297.1.pM-type_MADS family protein
Bradi4g11101.1.pM-type_MADS family protein
Bradi4g30081.1.pM-type_MADS family protein
Bradi4g31785.1.pM-type_MADS family protein
Bradi4g39415.1.pM-type_MADS family protein
Bradi4g39420.1.pM-type_MADS family protein
Bradi4g40333.1.pM-type_MADS family protein
M-type_MADS (M-type MADS) Family Introduction

The best studied plant MADS-box transcription factors are those involved in floral organ identity determination. Analysis of homeotic floral mutants resulted in the formulation of a genetic model, named the ABC model, that explains how the combined functions of three classes of genes (A, B, and C) determine the identity of the four flower organs (reviewed by Coen and Meyerowitz, 1991). Arabidopsis has two A-class genes (AP1 and AP2 [Bowman et al., 1989]), two B-class genes (PI and AP3), and a single C-class gene (AG), of which only AP2 is not a MADS-box gene. Recently, it was shown that the Arabidopsis B- and C-function genes, which control petal, stamen, and carpel development, are functionally dependent on three highly similar MADS-box genes, SEP1, SEP2, and SEP3 (Pelaz et al., 2000). Interestingly, only when mutant knockout alleles of the three SEP genes were combined in a triple sep1 sep2 sep3 mutant was loss of petal, stamen, and carpel identity observed, resulting in a flower composed of only sepals. This example shows that redundancy occurs in the MADS-box gene family, which complicates reverse genetic strategies for gene function analysis. The SHP genes provide another example of MADS-box gene redundancy. shp1 and shp2 single mutants do not exhibit any phenotypic effect, whereas in the double mutant, development of the dehiscence zone is disturbed in the fruit, resulting in a failure to release seeds (Liljegren et al., 2000)[1].

It has been proposed that there are at least 2 lineages (type I and type II) of MADS-box genes in plants, animals, and fungi. Most of the well-studied plant genes are type II genes and have three more domains than type I genes from the N to the C terminus of the protein:intervening (I) domain (~30 codons), keratin-lik e coiled-coil (K) domain (~70 codons), and Cterminal (C) domain (variable length). These genes are called the MIKC-type and are specific to plants[2].

The MADS-box is a DNA binding domain of 58 amino acids that binds DNA at consensus recognition sequences known as CArG boxes [CC(A/T)6GG] (Hayes et al., 1988; Riechmann et al., 1996b). The interaction with DNA has been studied in detail for the human and yeast MADS-box proteins thanks to the resolved crystal structures (Pellegrini et al., 1995; Santelli and Richmond, 2000). The I domain is less conserved and contributes to the specification of dimerization. The K domain is characterized by a coiled-coil structure, which facilitates the dimerization of MADS-box proteins (Davies et al., 1996; Fan et al., 1997). The C domain is the least conserved domain; in some cases, it has been shown to contain a transactivation domain or to contribute to the formation of multimeric MADS-box protein complexes (Egea-Cortines et al., 1999; Honma and Goto, 2001)[1].

1.Parenicova L, de Folter S, Kieffer M, Horner DS, Favalli C, Busscher J, Cook HE, Ingram RM, Kater MM, Davies B, Angenent GC, Colombo L.
Molecular and phylogenetic analyses of the complete MADS-box transcription factor family in Arabidopsis: new openings to the MADS world.
Plant Cell. 2003 Jul;15(7):1538-51.
PMID: 12837945
2.Nam J, dePamphilis CW, Ma H, Nei M.
Antiquity and evolution of the MADS-box gene family controlling flower development in plants.
Mol Biol Evol. 2003 Sep;20(9):1435-47. Epub 2003 May 30.
PMID: 12777513