PlantTFDB
PlantRegMap/PlantTFDB v5.0
Plant Transcription Factor Database
Previous version: v3.0 v4.0
Triticum dicoccoides
YABBY Family
Species TF ID Description
TRIDC1AG026930.1YABBY family protein
TRIDC1AG026930.3YABBY family protein
TRIDC1AG026930.4YABBY family protein
TRIDC1AG026930.5YABBY family protein
TRIDC1BG033970.2YABBY family protein
TRIDC1BG033970.3YABBY family protein
TRIDC1BG033970.4YABBY family protein
TRIDC2AG033700.1YABBY family protein
TRIDC2AG055590.1YABBY family protein
TRIDC2AG055590.2YABBY family protein
TRIDC2BG038350.1YABBY family protein
TRIDC2BG038350.2YABBY family protein
TRIDC2BG038350.3YABBY family protein
TRIDC2BG058420.1YABBY family protein
TRIDC2BG058420.2YABBY family protein
TRIDC2BG058420.3YABBY family protein
TRIDC2BG058420.4YABBY family protein
TRIDC4AG008110.1YABBY family protein
TRIDC4AG008110.2YABBY family protein
TRIDC4AG008110.3YABBY family protein
TRIDC4AG008110.4YABBY family protein
TRIDC4BG042970.1YABBY family protein
TRIDC4BG042970.2YABBY family protein
TRIDC4BG042970.3YABBY family protein
TRIDC4BG042970.4YABBY family protein
TRIDC4BG042970.5YABBY family protein
TRIDC5AG003850.1YABBY family protein
TRIDC5AG003850.2YABBY family protein
TRIDC5AG003850.3YABBY family protein
TRIDC5AG003850.4YABBY family protein
TRIDC5AG054330.1YABBY family protein
TRIDC5AG054330.2YABBY family protein
TRIDC5AG054330.3YABBY family protein
TRIDC5AG054330.4YABBY family protein
TRIDC5AG054330.5YABBY family protein
TRIDC5AG054330.6YABBY family protein
TRIDC5AG054330.7YABBY family protein
TRIDC5AG054330.8YABBY family protein
TRIDC5BG003960.1YABBY family protein
TRIDC5BG003960.2YABBY family protein
TRIDC5BG003960.3YABBY family protein
TRIDC5BG003960.4YABBY family protein
TRIDC5BG058290.1YABBY family protein
TRIDC5BG058290.2YABBY family protein
TRIDC5BG058290.3YABBY family protein
TRIDC5BG058290.4YABBY family protein
TRIDC5BG058290.5YABBY family protein
TRIDC5BG058290.6YABBY family protein
TRIDC6AG036600.1YABBY family protein
TRIDC6AG036600.2YABBY family protein
TRIDC6BG043450.1YABBY 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