Molecular Dissection of the Promoter of the Light-Induced and Circadian-Controlled APRR9 Gene Encoding a Clock-Associated Component of Arabidopsis thaliana

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概要

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• In the model higher plant Arabidopsis thaliana, a number of circadian clock-associated protein components have recently been identified. Among them, a small family of ARABIDOPSIS PSEUDO-RESPONSE REGULATORS (APRR1/TOC1, APRR3, APRR5, APRR7, and APRR9) is interesting because the most probable clock component TIMING OF CAB EXPRESSION 1 (TOC1) belongs to this family. Several lines of evidence have already been accumulated to support the view that not only APRR1/TOC1 but also other APRR family members are crucial for a better understanding of the molecular link between circadian rhythm and light-signal transduction. Among the APRR1/TOC1 family members, the circadian-controlled APRR9 gene is unique in that its expression is rapidly induced by light at the level of transcription. In this study we dissected the regulatory cis-elements of the light-induced and/or circadian-controlled APRR9 promoter by employing not only a mutant plant carrying a T-DNA insertion in the APRR9 promoter, but also a series of APRR9-promoter::LUC (luciferase) reporters that were introduced into an Arabidopsis cultured cell line (T87 cells). Taking the results of these approaches together, we provide several lines of evidence that the APRR9 promoter contains at least two distinctive and separable regulatory cis-elements: an “L element” responsible for the light-induced expression, followed by an “R element” necessary for the fundamental rhythmic expression of APRR9. Furthermore, APRR1/TOC1 was implicated in the L-element-mediated light response of APRR9, directly or indirectly.

• 社団法人 日本農芸化学会の論文
• 2005-02-23

著者

• Ito Shogo

  Laboratory of Molecular Microbiology, School of Agriculture, Nagoya University

• YAMASHINO Takafumi

  Laboratory of Molecular Microbiology, School of Agriculture, Nagoya University

• MIZUNO Takeshi

  Laboratory of Molecular Microbiology, School of Agriculture, Nagoya University

• NAKAMICHI Norihito

  Laboratory of Molecular Microbiology, School of Agriculture, Nagoya University

• MATSUSHIKA Akinori

  Laboratory of Molecular Microbiology, School of Agriculture, Nagoya University

• Nakamichi Norihito

  Riken Yokohama Jpn

• Nakamichi Norihito

  Laboratory Of Molecular Microbiology School Of Agriculture Nagoya University

• FUJIMORI Toru

  Laboratory of Molecular Microbiology, School of Agriculture, Nagoya University

• Ito Shogo

  Nagoya Univ. Nagoya Jpn

• Fujimori Toru

  Laboratory Of Molecular Microbiology School Of Agriculture Nagoya University

• Mizuno T

  Lab. Of Molecular Microbiology School Of Agriculture Nagoya Univ.

• Ashikari M

  Bioscience And Biotechnology Center Nagoya University

• Ashikari Motoyuki

  Bio-oriented Technology Research Advancement Institution:(present Address)bioscience Center Nagoya U

• Matsushika Akinori

  Laboratory Of Molecular Microbiology School Of Agriculture Nagoya University

• Ashikari Motoyuki

  Bioscience And Biotechnology Center Nagoya Univ.

• Yamashino Takafumi

  Laboratory Of Molecular Microbiology School Of Agriculture Nagoya University

• Ito Shogo

  Laboratory Of Molecular Microbiology School Of Agriculture Nagoya University

• Mizuno Takeshi

  Laboratory Of Microbiology School Of Agriculture Nagoya University

• NAKAMICHI Norihito

  Graduate School of Bioagricultural Sciences, Nagoya University

• YAMASHINO Takafumi

  Laboratory of Molecular and Functional Cenomics, School of Agriculture, Nagoya University

• NAKAMICHI Norihito

  Laboratory of Molecular and Functional Cenomics, School of Agriculture, Nagoya University

• ITO Shogo

  Laboratory of Molecular and Functional Genomics, School of Agriculture, Nagoya University

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