PlantRegMap/PlantTFDB v5.0
Plant Transcription Factor Database
Previous version: v3.0 v4.0
Solanum pennellii
BES1 Family
Species TF ID Description
Sopen01g038390.1BES1 family protein
Sopen01g038390.2BES1 family protein
Sopen02g014060.1BES1 family protein
Sopen02g020970.1BES1 family protein
Sopen03g001990.1BES1 family protein
Sopen04g033560.1BES1 family protein
Sopen07g030540.1BES1 family protein
Sopen08g001780.1BES1 family protein
Sopen08g001780.2BES1 family protein
Sopen08g001780.3BES1 family protein
Sopen10g028040.1BES1 family protein
Sopen12g030940.1BES1 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