Identification of chemoreceptor proteins for amino acids involved in host plant infection in Pseudomonas syringae pv. tabaci 6605
Copyright © 2021 Elsevier GmbH. All rights reserved..
Chemotaxis is crucial for Pseudomonas syringae pv. tabaci (Pta) 6605 to evoke disease in tobacco plants. Pta6605 harbors more than fifty genes for methyl-accepting chemotaxis proteins (mcp), but almost all are functionally uncharacterized. Previously we identified a dCache_1 type MCP in Pta6605 that mediates chemotaxis to γ-aminobutyric acid, called McpG. In this study, we characterized four more dCache_1 type MCPs, three of which, PscA, PscB, and PscC2, are responsible for sensing amino acids. Using a capillary chemotaxis assay, we observed that PscA, PscB, and PscC2 mutant strains had reduced chemotaxis to most amino acids, indicating that PscA and PscB mediate chemotaxis to 14 amino acids, while PscC2 has a slightly narrower ligand recognition, mediating chemotaxis to 12 amino acids. Other cellular functions were also affected in ΔpscB and ΔpscC2: swarming motility was reduced, and biofilm formation was increased. Furthermore, ΔpscB and ΔpscC2 but not ΔpscA had reduced virulence in the host tobacco plant. On the other hand, ΔpscC1 was defective in motility and did not even respond to yeast extract and was unable to cause disease. These findings supported the idea that the chemosensory pathway correlated with virulence-related phenotypes. Amino acids are abundant in tobacco apoplast; having multiple MCPs appears to support the invasion of Pta6605 into the plant.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2021 |
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| Erschienen: |
2021 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:253 |
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| Enthalten in: |
Microbiological research - 253(2021) vom: 01. Dez., Seite 126869 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Tumewu, Stephany Angelia [VerfasserIn] |
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| Links: |
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| Themen: |
Amino Acids |
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| Anmerkungen: |
Date Completed 03.01.2022 Date Revised 13.12.2023 published: Print-Electronic Citation Status MEDLINE |
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| doi: |
10.1016/j.micres.2021.126869 |
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| funding: |
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| Förderinstitution / Projekttitel: |
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| 520 | |a Chemotaxis is crucial for Pseudomonas syringae pv. tabaci (Pta) 6605 to evoke disease in tobacco plants. Pta6605 harbors more than fifty genes for methyl-accepting chemotaxis proteins (mcp), but almost all are functionally uncharacterized. Previously we identified a dCache_1 type MCP in Pta6605 that mediates chemotaxis to γ-aminobutyric acid, called McpG. In this study, we characterized four more dCache_1 type MCPs, three of which, PscA, PscB, and PscC2, are responsible for sensing amino acids. Using a capillary chemotaxis assay, we observed that PscA, PscB, and PscC2 mutant strains had reduced chemotaxis to most amino acids, indicating that PscA and PscB mediate chemotaxis to 14 amino acids, while PscC2 has a slightly narrower ligand recognition, mediating chemotaxis to 12 amino acids. Other cellular functions were also affected in ΔpscB and ΔpscC2: swarming motility was reduced, and biofilm formation was increased. Furthermore, ΔpscB and ΔpscC2 but not ΔpscA had reduced virulence in the host tobacco plant. On the other hand, ΔpscC1 was defective in motility and did not even respond to yeast extract and was unable to cause disease. These findings supported the idea that the chemosensory pathway correlated with virulence-related phenotypes. Amino acids are abundant in tobacco apoplast; having multiple MCPs appears to support the invasion of Pta6605 into the plant | ||
| 650 | 4 | |a Journal Article | |
| 650 | 4 | |a Amino acids | |
| 650 | 4 | |a Chemoreceptor | |
| 650 | 4 | |a MCP | |
| 650 | 4 | |a Pseudomonas syringae | |
| 650 | 4 | |a Virulence | |
| 650 | 7 | |a Amino Acids |2 NLM | |
| 650 | 7 | |a Bacterial Proteins |2 NLM | |
| 700 | 1 | |a Matsui, Hidenori |e verfasserin |4 aut | |
| 700 | 1 | |a Yamamoto, Mikihiro |e verfasserin |4 aut | |
| 700 | 1 | |a Noutoshi, Yoshiteru |e verfasserin |4 aut | |
| 700 | 1 | |a Toyoda, Kazuhiro |e verfasserin |4 aut | |
| 700 | 1 | |a Ichinose, Yuki |e verfasserin |4 aut | |
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