Effect of the arcA Mutation on the Expression of Flagella Genes in Escherichia coli

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概要

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• Flagella expression in Escherichia coli is controlled in a hierarchical manner, in which class-1 gene products, FlhDC, functions as a master regulator to control class-2 genes that encode motility-related genes. fliA, one of the class 2 genes, encodes flagellum-specific sigma factor (FliA/Sigma F/Sigma-28), which is necessary for the expression of class-3 genes. Previously, we carried out transcriptome analyses of all two-component regulatory systems of E. coli, and determined that the arcA mutant showed the motility-defective phenotype. In this study, we characterized the arcA mutant, and we present evidence that ArcA is necessary for the expression of FliA, but not for the master regulators, FlhDC. The phosphorylation site of ArcA is necessary for motility, while a cognate histidine kinase, ArcB, appears not to be involved in motility. This suggests that there must be regulatory factors other than ArcB interacting with ArcA to control flagella genes.

• 社団法人 日本農芸化学会の論文

著者

• MIZUNO Takeshi

  Laboratory of Molecular Microbiology, School of Agriculture, Nagoya University

• AIBA Hirofumi

  Laboratory of Molecular Microbiology, School of Agriculture, Nagoya University

• Mizuno T

  Laboratory Of Molecular Microbiology School Of Agriculture Nagoya University

• Mizuno T

  Lab. Of Molecular Microbiology School Of Agriculture Nagoya Univ.

• Kato Yoshinobu

  Laboratory of Molecular Microbiology, School of Agriculture, Nagoya University

• Sugiura Masahito

  Laboratory of Molecular Microbiology, School of Agriculture, Nagoya University

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