PlantTFDB
Plant Transcription Factor Database
v4.0
Previous version: v1.0, v2.0, v3.0
Petunia axillaris
BES1 Family
Species TF ID Description
Peaxi162Scf00008g00459.1BES1 family protein
Peaxi162Scf00020g00248.1BES1 family protein
Peaxi162Scf00045g01116.1BES1 family protein
Peaxi162Scf00057g00623.1BES1 family protein
Peaxi162Scf00064g00329.1BES1 family protein
Peaxi162Scf00111g01478.1BES1 family protein
Peaxi162Scf00112g01217.1BES1 family protein
Peaxi162Scf00264g00840.1BES1 family protein
Peaxi162Scf01327g00017.1BES1 family protein
BES1 Family Introduction

Brassinosteroids (BRs) signal through a plasma membrane-localized receptor kinase to regulate plant growth and development. We showed previously that a novel protein, BES1(BRI1-EMS-SUPPRESSOR 1), accumulates in the nucleus in response to BRs, where it plays a role in BR-regulated gene expression; however, the mechanism by which BES1 regulates gene expression is unknown. In this study, we dissect BES1 subdomains and establish that BES1 is a transcription factor that binds to and activates BR target gene promoters both in vitro and in vivo. BES1 interacts with a basic helix-loop-helix protein, BIM1, to synergistically bind to E box (CANNTG) sequences present in many BR-induced promoters. Loss-of-function and gain-of-function mutants of BIM1 and its close family members display BR response phenotypes. Thus, BES1 defines a new class of plant-specific transcription factors that cooperate with transcription factors such as BIM1 to regulate BR-induced genes.

Yin Y, Vafeados D, Tao Y, Yoshida S, Asami T, Chory J.
A new class of transcription factors mediates brassinosteroid-regulated gene expression in Arabidopsis.
Cell. 2005 Jan 28;120(2):249-59.
PMID: 15680330