NDLI: A recently evolved isoform of the transcription factor BES1 promotes brassinosteroid signaling and development in Arabidopsis thaliana.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Jiang, Jianjun Zhang, Chi Wang, Xuelu
Description	Country affiliation: China Author Affiliation: Jiang J ( State Key Laboratory of Genetic Engineering and Department of Genetics, School of Life Sciences, Fudan University, Shanghai 200433, China College of Life Science and Technology, Huazhong Agricultural University, Wuhan 430070, China.); Zhang C ( State Key Laboratory of Genetic Engineering and Department of Genetics, School of Life Sciences, Fudan University, Shanghai 200433, China.); Wang X ( College of Life Science and Technology, Huazhong Agricultural University, Wuhan 430070, China xlwang@mail.hzau.edu.cn.)
Abstract	Brassinosteroids (BRs) are essential steroid hormones that regulate plant growth and development. The transcription factor BRI1-EMS-SUPPRESSOR1 (BES1) regulates the expression of thousands of target genes in response to BRs. Here, we report an Arabidopsis thaliana-specific long isoform of BES1, BES1-L, which has stronger activity in promoting BR signaling than the canonical and widely used short BES1-S. The BES1-L isoform contains an additional N-terminal bipartite nuclear localization signal, which strongly promotes its nuclear localization. BES1-L also promotes the nuclear localization of BES1-S and BRASSINAZOLE-RESISTANT1 via dimerization. The transcription of BES1-L and BES1-S is differentially regulated by BRs due to the presence of G-box element in the BES1-S promoter. Moreover, BES1-L uniquely exists in the majority of A. thaliana ecotypes, but not in other species, even its Brassicaceae relatives, including Arabidopsis lyrata. The phenotypes of the BES1-L overexpression lines and plants with truncated BES1-L indicate that BES1-L is a more important isoform of BES1 in Arabidopsis and may have contributed to the evolution and expansion of A. thaliana.
File Format	HTM / HTML
ISSN	10404651
e-ISSN	1531298X
DOI	10.1105/tpc.114.133678
Journal	THE PLANT CELL ONLINE
Issue Number	2
Volume Number	27
Language	English
Publisher	American Society of Plant Biologists
Publisher Date	2015-02-01
Publisher Place	United States
Access Restriction	Open
Subject Keyword	Discipline Botany Arabidopsis Proteins Metabolism Arabidopsis Growth & Development Brassinosteroids Evolution, Molecular Nuclear Proteins Plant Development Signal Transduction Transcription Factors Amino Acid Sequence Genetics Chemistry Cell Nucleus Gene Expression Regulation, Plant Green Fluorescent Proteins Hypocotyl Molecular Sequence Data Phenotype Plants, Genetically Modified Protein Isoforms Protein Transport Subcellular Fractions Tobacco Transcription, Genetic Research Support, Non-u.s. Gov't
Content Type	Text
Resource Type	Article
Subject	Cell Biology Plant Science

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A Recently Evolved Isoform of the Transcription Factor BES1 Promotes Brassinosteroid Signaling and Development in Arabidopsis thaliana

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