BBX32, an Arabidopsis B-Box Protein, Functions in Light Signaling by Suppressing HY5-Regulated Gene Expression and Interacting with STH2/BBX21

被引：134

作者：

Holtan, Hans E. ^{[1
]}

Bandong, Simona ^{[1
]}

Marion, Colleen M. ^{[1
]}

Adam, Luc ^{[1
]}

Tiwari, Shiv ^{[1
]}

Shen, Yu ^{[1
]}

Maloof, Julin N. ^{[2
]}

Maszle, Don R. ^{[1
]}

Ohto, Masa-aki ^{[1
]}

Preuss, Sasha ^{[3
]}

Meister, Rob ^{[3
]}

Petracek, Marie ^{[3
]}

Repetti, Peter P. ^{[1
]}

Reuber, T. Lynne ^{[1
]}

Ratcliffe, Oliver J. ^{[1
]}

Khanna, Rajnish ^{[1
]}

机构：

[1] Mendel Biotechnol Inc, Hayward, CA 94545 USA

[2] Univ Calif Davis, Dept Plant Biol, Davis, CA 95616 USA

[3] Monsanto Co, Chesterfield, MO 63017 USA

来源：

PLANT PHYSIOLOGY | 2011年 / 156卷 / 04期

关键词：

TRANSCRIPTION FACTOR HY5; DISRUPTS CIRCADIAN-RHYTHMS; RED-LIGHT; PLANT PHOTOMORPHOGENESIS; POSITIVE REGULATOR; GENOME EXPRESSION; BZIP PROTEIN; UV-B; COP1; THALIANA;

D O I：

10.1104/pp.111.177139

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

A B-box zinc finger protein, B-BOX32 (BBX32), was identified as playing a role in determining hypocotyl length during a large-scale functional genomics study in Arabidopsis (Arabidopsis thaliana). Further analysis revealed that seedlings overexpressing BBX32 display elongated hypocotyls in red, far-red, and blue light, along with reduced cotyledon expansion in red light. Through comparative analysis of mutant and overexpression line phenotypes, including global expression profiling and growth curve studies, we demonstrate that BBX32 acts antagonistically to ELONGATED HYPOCOTYL5 (HY5). We further show that BBX32 interacts with SALT TOLERANCE HOMOLOG2/BBX21, another B-box protein previously shown to interact with HY5. Based on these data, we propose that BBX32 functions downstream of multiple photoreceptors as a modulator of light responses. As such, BBX32 potentially has a native role in mediating gene repression to maintain dark adaptation.

引用

页码：2109 / 2123

页数：15

共 73 条

[51] THE CONSTANS GENE OF ARABIDOPSIS PROMOTES FLOWERING AND ENCODES A PROTEIN SHOWING SIMILARITIES TO ZINC-FINGER TRANSCRIPTION FACTORS [J].