ID | 34112 |
フルテキストURL | |
著者 |
Taguchi, Fumiko
The Graduate School of Natural Science and Technology, Okayama University
Ogawa, Yujiro
The Graduate School of Natural Science and Technology, Okayama University
Takeuchi, Kasumi
The Graduate School of Natural Science and Technology, Okayama University
Suzuki, Tomoko
The Graduate School of Natural Science and Technology, Okayama University
Toyoda, Kazuhiro
The Graduate School of Natural Science and Technology, Okayama University
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Shiraishi, Tomonori
The Graduate School of Natural Science and Technology, Okayama University
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Ichinose, Yuki
The Graduate School of Natural Science and Technology, Okayama University
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抄録 | Pseudomonas syringae pv. tabaci 6605 possesses a genetic region involved in flagellin glycosylation. This region is composed of three open reading frames: orf1, orf2, and orf3. Our previous study revealed that orf1 and orf2 encode glycosyltransferases; on the other hand, orf3 has no role in posttranslational modification of flagellin. Although the function of Orf3 remained unclear, an orf3 deletion mutant (Delta orf3 mutant) had reduced virulence on tobacco plants. Orf3 shows significant homology to a 3-oxoacyl-(acyl carrier protein) synthase III in the fatty acid elongation cycle. The Delta orf3 mutant had a significantly reduced ability to form acyl homoserine lactones (AHLs), which are quorum-sensing molecules, suggesting that Orf3 is required for AHL synthesis. In comparison with the wild-type strain, swarming motility, biosurfactant production, and tolerance to H2O2 and antibiotics were enhanced in the Delta orf3 mutant. A scanning electron micrograph of inoculated bacteria on the tobacco leaf surface revealed that there is little extracellular polymeric substance matrix surrounding the cells in the Delta orf3 mutant. The phenotypes of the Delta orf3 mutant and an AHL synthesis (Delta psyI) mutant were similar, although the mutant-specific characteristics were more extreme in the Delta orf3 mutant. The swarming motility of the Delta orf3 mutant was greater than that of the Delta psyI mutant. This was attributed to the synergistic effects of the overproduction of biosurfactants and/or alternative fatty acid metabolism in the Delta orf3 mutant. Furthermore, the amounts of iron and biosurfactant seem to be involved in biofilm development under quorum-sensing regulation in P. syringae pv. tabaci 6605.
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キーワード | TO-CELL SIGNALS
AERUGINOSA
FLAGELLIN
BIOFILMS
MOTILITY
IRON
IDENTIFICATION
SIDEROPHORES
SPECIFICITY
FLUORESCENT
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備考 | Digital Object Identifer:10.1128/JB.00763-06
Published with permission from the copyright holder. This is the author's copy, as published in the Journal of Bacteriology, Dec 2006, Volume 188, Issue 24, Pages 8376-8384. Publisher URL:http://dx.doi.org/10.1128/JB.00763-06 Direct access to Thomson Web of Science record Copyright © 2006 American Society for Microbiology |
発行日 | 2006-12
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出版物タイトル |
Journal of Bacteriology
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巻 | 188巻
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号 | 24号
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出版者 | American Society for Microbiology
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開始ページ | 8376
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終了ページ | 8384
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ISSN | 0021-9193
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NCID | AA0069403X
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資料タイプ |
学術雑誌論文
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言語 |
英語
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著作権者 | American Society for Microbiology
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論文のバージョン | author
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査読 |
有り
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DOI | |
PubMed ID | |
Web of Science KeyUT | |
Submission Path | microbiology_and_immunology/7
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