Plant Transcription Factor Database
Previous version: v3.0
Musa acuminata
YABBY Family
Species TF ID Description
GSMUA_Achr11P03800_001YABBY family protein
GSMUA_Achr11P17520_001YABBY family protein
GSMUA_Achr1P04480_001YABBY family protein
GSMUA_Achr1P24490_001YABBY family protein
GSMUA_Achr1P27150_001YABBY family protein
GSMUA_Achr2P12850_001YABBY family protein
GSMUA_Achr3P15060_001YABBY family protein
GSMUA_Achr3P25290_001YABBY family protein
GSMUA_Achr3P25660_001YABBY family protein
GSMUA_Achr3P30800_001YABBY family protein
GSMUA_Achr4P01430_001YABBY family protein
GSMUA_Achr4P22750_001YABBY family protein
GSMUA_Achr4P31310_001YABBY family protein
GSMUA_Achr5P08930_001YABBY family protein
GSMUA_Achr5P23610_001YABBY family protein
GSMUA_Achr6P24550_001YABBY family protein
GSMUA_Achr6P31080_001YABBY family protein
GSMUA_Achr7P01330_001YABBY family protein
GSMUA_Achr7P07130_001YABBY family protein
GSMUA_Achr7P07830_001YABBY family protein
GSMUA_Achr8P04340_001YABBY family protein
GSMUA_Achr8P04750_001YABBY family protein
GSMUA_Achr8P11580_001YABBY family protein
GSMUA_Achr8P26600_001YABBY family protein
GSMUA_AchrUn_randomP19410_001YABBY 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