title: SCAB3 Is Required for Reorganization of Actin Filaments during Light Quality Changes.
abstract: The stomatal closure-related actin binding protein (SCAB) family is plant-specific, and its members all contain a novel actin binding domain. Here, we report that SCAB3, a homolog of SCAB1, binds, stabilizes and bundles actin filaments. The SCAB3 promoter contains a cis-element which could be bound by the FHY3/FAR1 transcription factors. Consistently, the expression of SCAB3 is induced when plants were transferred from white light to far red light (T-Far Red) conditions. The scab3 mutants show defects in the control of hypocotyl elongation under T-Far Red condition, which may result from an impaired reorganization of actin filaments. Together, our results suggest that SCAB3 plays an important role in plant growth under changes of light conditions possibly by regulating actin filament dynamics.
authors.affiliation: State Key Laboratory of Plant Physiology and Biochemistry, College of Biological Sciences, China Agricultural University, Beijing 100193, China.
authors.forename: Chongwu
authors.initials: C
authors.lastname: Wang
authors.affiliation: School of Life Science & Technology, Nanyang Normal University, Nanyang 473061, China.
authors.forename: Yuan
authors.initials: Y
authors.lastname: Zheng
authors.affiliation: State Key Laboratory of Plant Physiology and Biochemistry, College of Biological Sciences, China Agricultural University, Beijing 100193, China.
authors.forename: Yang
authors.initials: Y
authors.lastname: Zhao
authors.affiliation: State Key Laboratory of Plant Physiology and Biochemistry, College of Biological Sciences, China Agricultural University, Beijing 100193, China.
authors.forename: Yi
authors.initials: Y
authors.lastname: Zhao
authors.affiliation: State Key Laboratory of Plant Physiology and Biochemistry, College of Biological Sciences, China Agricultural University, Beijing 100193, China.
authors.forename: Jigang
authors.initials: J
authors.lastname: Li
authors.affiliation: State Key Laboratory of Plant Physiology and Biochemistry, College of Biological Sciences, China Agricultural University, Beijing 100193, China. Electronic address: guoyan@cau.edu.cn.
authors.forename: Yan
authors.initials: Y
authors.lastname: Guo
mesh_terms: D008841:Actin Cytoskeleton / Q000235:genetics / Q000378:metabolism*; D017360:Arabidopsis / Q000166:cytology / Q000235:genetics* / Q000502:physiology / Q000528:radiation effects; D029681:Arabidopsis Proteins / Q000235:genetics / Q000378:metabolism*; D035264:Flowers / Q000166:cytology / Q000235:genetics / Q000502:physiology / Q000528:radiation effects; D018506:Gene Expression Regulation, Plant; D017930:Genes, Reporter; D008027:Light; D008840:Microfilament Proteins / Q000235:genetics / Q000378:metabolism*; D009154:Mutation; D010834:Phytochrome / Q000235:genetics / Q000378:metabolism; D018515:Plant Leaves / Q000166:cytology / Q000235:genetics / Q000502:physiology / Q000528:radiation effects; D011401:Promoter Regions, Genetic / Q000235:genetics; D017434:Protein Structure, Tertiary; D036226:Seedlings / Q000166:cytology / Q000235:genetics / Q000502:physiology / Q000528:radiation effects; D014157:Transcription Factors / Q000235:genetics / Q000378:metabolism
chemical_list: D029681:Arabidopsis Proteins; C452847:FHY3 protein, Arabidopsis; D008840:Microfilament Proteins; C000604614:SCAB3 protein, Arabidopsis; D014157:Transcription Factors; D010834:Phytochrome
keywords: Actin; Arabidopsis; Cytoskeleton; Far Red light