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Content Provider | World Health Organization (WHO)-Global Index Medicus |
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Author | Yang, Ke-Zhen Jiang, Min Wang, Ming Xue, Shan Zhu, Ling-Ling Wang, Hong-Zhe Zou, Jun-Jie Lee, Eun-Kyoung Sack, Fred Le, Jie |
Description | Country affiliation: China Author Affiliation: Yang KZ ( Key Laboratory of Plant Molecular Physiology, Institute of Botany, Chinese Academy of Sciences, 20 Nanxincun, Beijing 100093, China.); Jiang M ( Key Laboratory of Plant Molecular Physiology, Institute of Botany, Chinese Academy of Sciences, 20 Nanxincun, Beijing 100093, China.); Wang M ( Key Laboratory of Plant Molecular Physiology, Institute of Botany, Chinese Academy of Sciences, 20 Nanxincun, Beijing 100093, China.); Xue S ( Key Laboratory of Plant Molecular Physiology, Institute of Botany, Chinese Academy of Sciences, 20 Nanxincun, Beijing 100093, China.); Zhu LL ( Key Laboratory of Plant Molecular Physiology, Institute of Botany, Chinese Academy of Sciences, 20 Nanxincun, Beijing 100093, China.); Wang HZ ( Key Laboratory of Plant Molecular Physiology, Institute of Botany, Chinese Academy of Sciences, 20 Nanxincun, Beijing 100093, China.); Zou JJ ( Key Laboratory of Plant Molecular Physiology, Institute of Botany, Chinese Academy of Sciences, 20 Nanxincun, Beijing 100093, China.); Lee EK ( Department of Botany, University of British Columbia, Vancouver, British Columbia V6T 1Z4, Canada.); Sack F ( Department of Botany, University of British Columbia, Vancouver, British Columbia V6T 1Z4, Canada.); Le J ( Key Laboratory of Plant Molecular Physiology, Institute of Botany, Chinese Academy of Sciences, 20 Nanxincun, Beijing 100093, China. Electronic address: lejie@ibcas.ac.cn.) |
Abstract | The initiation of stomatal lineage and subsequent asymmetric divisions in Arabidopsis require the activity of the basic helix-loop-helix transcription factor SPEECHLESS (SPCH). It has been shown that SPCH controls entry into the stomatal lineage as a substrate either of the MITOGEN-ACTIVATED PROTEIN KINASE (MAPK) cascade or GSK3-like kinase BRASSINOSTEROID INSENSITIVE 2 (BIN2). Here we show that three serine residues of SPCH appear to be the primary phosphorylation targets of Cyclin-Dependent Kinases A;1 (CDKA;1) in vitro, and among them Serine 186 plays a crucial role in stomatal formation. Expression of an SPCH construct harboring a mutation that results in phosphorylation deficiencies on Serine 186 residue failed to rescue stomatal defects in spch null mutants. Expression of a phosphorylation-mimic mutant SPCH(S186D) complemented stomatal production defects in the transgenic lines harboring the targeted expression of dominant-negative CDKA;1.N146. Therefore, in addition to MAPK- and BIN2-mediated phosphorylation on SPCH, phosphorylation at Serine 186 is positively required for SPCH function in regulating stomatal development. |
File Format | HTM / HTML |
ISSN | 16742052 |
e-ISSN | 17529867 |
Journal | Molecular Plant |
Issue Number | 5 |
Volume Number | 8 |
Language | English |
Publisher | Elsevier |
Publisher Date | 2015-05-01 |
Publisher Place | Great Britain (UK) |
Access Restriction | Open |
Subject Keyword | Discipline Botany Discipline Molecular Biology Arabidopsis Proteins Chemistry Metabolism Arabidopsis Basic Helix-loop-helix Transcription Factors Plant Stomata Growth & Development Serine Amino Acid Motifs Genetics Gene Expression Regulation, Plant Phosphorylation Research Support, Non-u.s. Gov't |
Content Type | Text |
Resource Type | Article |
Subject | Molecular Biology Plant Science |
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