Plant Transcription Factor Database
Previous version: v3.0
Pyrus bretschneideri
DBB Family
Species TF ID Description
Pbr005884.1DBB family protein
Pbr015820.1DBB family protein
Pbr019591.1DBB family protein
Pbr020473.1DBB family protein
Pbr022361.1DBB family protein
Pbr022786.1DBB family protein
Pbr029421.1DBB family protein
Pbr032616.1DBB family protein
Pbr034751.1DBB family protein
Pbr038976.1DBB family protein
Pbr042773.1DBB family protein
DBB Family Introduction

In this study, a small subfamily of double B-box zinc finger (DBB, DOUBLE B-BOX) genes, encoding eight putative transcription factors, were characterized with reference to the circadian rhythm and the early photomorphogenic regulation of hypocotyl elongation in response to light signals. Among these, it was found that the transcriptions of five DBB genes were under the control of circadian rhythm. To gain insight into the physiological roles of these putative transcription factors, forward and reverse genetic studies were carried out. The results suggested that they are commonly implicated in light signal transduction during early photomorphogenesis, however, their functions are not totally redundant, as judged by the fact that their circadian-expression profiles (or phases) were distinctive from each other, and by the fact that some DBBs (named DBB1a, DBB1b, STO, and STH) were apparently implicated in light signal transduction in a negative manner, whereas another (named DBB3) was implicated in a positive manner with regard to light-induced inhibition of elongation of hypocotyls.

Kumagai T, Ito S, Nakamichi N, Niwa Y, Murakami M, Yamashino T, Mizuno T.
The common function of a novel subfamily of B-Box zinc finger proteins with reference to circadian-associated events in Arabidopsis thaliana.
Biosci Biotechnol Biochem, 2008. 72(6): p. 1539-49.
PMID: 18540109