PlantTFDB
Plant Transcription Factor Database
v4.0
Previous version: v1.0, v2.0, v3.0
Triticum aestivum
YABBY Family
Species TF ID Description
Traes_1AL_7D8C62AA4.1YABBY family protein
Traes_1AS_59001495A.1YABBY family protein
Traes_1BL_1E9F7A4EF.1YABBY family protein
Traes_1BL_8AC21563E.1YABBY family protein
Traes_1DL_0D056C042.1YABBY family protein
Traes_1DL_C5AF9D06A.1YABBY family protein
Traes_2AL_71DE02042.1YABBY family protein
Traes_2BL_8BEA9CE1B.1YABBY family protein
Traes_2DL_CF1491615.1YABBY family protein
Traes_3AL_730255B9F.1YABBY family protein
Traes_4AS_BE972A266.1YABBY family protein
Traes_4AS_BE972A2661.1YABBY family protein
Traes_4BL_2B17F465A.1YABBY family protein
Traes_4BL_34FE2C7F2.2YABBY family protein
Traes_4DL_631616695.2YABBY family protein
Traes_5AL_EB97D69D7.2YABBY family protein
Traes_5AS_31C2540C0.2YABBY family protein
Traes_5BL_4DEC298F9.1YABBY family protein
Traes_5BS_A782F7510.2YABBY family protein
Traes_5DL_0E369E1FC.2YABBY family protein
Traes_5DS_268147383.1YABBY family protein
Traes_6AL_2983D4EB6.1YABBY family protein
Traes_6AS_6AAA7678C.1YABBY family protein
Traes_6BL_3F8DB6043.1YABBY family protein
Traes_6DL_59DB06B9F.1YABBY family protein
YABBY Family Introduction

Members of the YABBY gene family are characterized by two conserved domains, a C2C2 zinc finger-like domain towards the amino terminus and a helix-loop-helix, which we have called the YABBY domain, with sequence similarity to the first two helices of the HMG box towards the carboxyl end of the protein. In addition to the conserved YABBY and zinc finger domains, YAB1, YAB2, YAB3 and YAB5 display some sequence similarity on the carboxyl side of the YABBY domain. The region between the YABBY and zinc finger domains is variable amongst family members.

The presence of these domains suggests these proteins function as transcription factors. Database searches suggest that this family may be plant-specific, as genes with a similar arrangement of zinc finger and YABBY domains do not occur in either Caenorhabditis elegans or Saccharomyces cerevisiae.

The YABBY gene are expressed in a polar manner in all lateral organs produced by apical and flower meristems. Their transcripts are detectable only in the abaxial domains of lateral organs when their primordia emerge and begin to differentiate. Loss of polar expression of these genes results in loss of polar differentiation of cell types in lateral organs, and gain-of-function alleles result in abaxialization of lateral organs. The expression of these genes is precisely correlated with abaxial cell fate in mutants in which abaxial cell fates are found ectopically, reduced or eliminated. We propose that members of this gene family act redundantly to specify abaxial identity in lateral organs produced by the apical and flower meristems in Arabidopsis.

Siegfried KR, Eshed Y, Baum SF, Otsuga D, Drews GN, Bowman JL.
Members of the YABBY gene family specify abaxial cell fate in Arabidopsis.
Development. 1999 Sep;126(18):4117-28.
PMID: 10457020