Plant Transcription Factor Database
Previous version: v1.0, v2.0, v3.0
Spinacia oleracea
DBB Family
Species TF ID Description
Sp_013060_hufi.t1DBB family protein
Sp_033430_uuxs.t1DBB family protein
Sp_033430_uuxs.t2DBB family protein
Sp_033430_uuxs.t3DBB family protein
Sp_110210_upnr.t1DBB family protein
Sp_126070_ofpz.t1DBB family protein
Sp_158150_yjnh.t1DBB family protein
Sp_175780_uucd.t1DBB family protein
Sp_175780_uucd.t2DBB family protein
Sp_198260_xksc.t1DBB family protein
Sp_199900_dtph.t1DBB 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