PlantRegMap/PlantTFDB v5.0
Plant Transcription Factor Database
Medicago truncatula
DBB Family
Species TF ID Description
Medtr1g023260.1DBB family protein
Medtr1g023260.3DBB family protein
Medtr1g023260.4DBB family protein
Medtr2g073370.1DBB family protein
Medtr2g099010.1DBB family protein
Medtr2g099010.2DBB family protein
Medtr3g113070.1DBB family protein
Medtr3g117320.1DBB family protein
Medtr4g067320.1DBB family protein
Medtr4g067320.2DBB family protein
Medtr4g071200.1DBB family protein
Medtr5g021580.1DBB family protein
Medtr5g021580.2DBB family protein
Medtr5g069480.3DBB family protein
Medtr5g069480.4DBB 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