ATL54, a ubiquitin ligase gene related to secondary cell wall formation, is transcriptionally regulated by MYB46
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概要
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We previously characterized Arabidopsis Tóxicos en Levadura54 (ATL54), a ubiquitin ligase associated with secondary cell wall formation. The ATL54 gene is co-expressed with secondary wall-associated genes, and the knock-out of ATL54 up-regulates the expression of cellulose, lignin, and xylan biosynthetic genes in apical stem portions of four-week-old plants. Here, we report the tissue-level localization patterns and the regulation of ATL54 expression. The β-glucuronidase (GUS) reporter gene driven by the ATL54 promoter was significantly expressed in interfascicular fibers, xylary fibers, and vessels in inflorescence stems. A transient transfection assay using Arabidopsis T87 cells showed that the expression of the firefly luciferase gene driven by the ATL54 promoter was activated by MYB46, which is a key transcriptional activator of secondary wall formation. In addition, the electrophoretic mobility of ATL54 promoter fragments was shifted by a recombinant MYB46 protein. These results indicate that ATL54 expression is regulated by MYB46, and support the view that ATL54 has a role in secondary wall formation.
- 日本植物細胞分子生物学会の論文
著者
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NISHIKUBO Nobuyuki
RIKEN Plant Science Center
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Umezawa Toshiaki
Research Institute For Sustainable Humanosphere Kyoto University
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Yamaguchi Masatoshi
Riken Plant Science Center
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Suzuki Shiro
Research Institute For Sustainable Humanosphere Kyoto University
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Demura Taku
Riken Biomass Engineering Program
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HATTORI Takefumi
Research Institute for Sustainable Humanosphere, Kyoto University
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Noda Soichiro
Research Institute for Sustainable Humanosphere, Kyoto University
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Takahashi Yoshinori
Research Institute for Sustainable Humanosphere, Kyoto University
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Tsurumaki Yuta
Research Institute for Sustainable Humanosphere, Kyoto University
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