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Jourdan S, Francis IM, Kim MJ, Salazar JJC, Planckaert S, Frère JM, Matagne A, Kerff F, Devreese B, Loria R, Rigali S. The CebE/MsiK Transporter is a Doorway to the Cello-oligosaccharide-mediated Induction of Streptomyces scabies Pathogenicity. Sci Rep 2016; 6:27144. [PMID: 27250236 PMCID: PMC4890002 DOI: 10.1038/srep27144] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2016] [Accepted: 05/16/2016] [Indexed: 11/15/2022] Open
Abstract
Streptomyces scabies is an economically important plant pathogen well-known for damaging root and tuber crops by causing scab lesions. Thaxtomin A is the main causative agent responsible for the pathogenicity of S. scabies and cello-oligosaccharides are environmental triggers that induce the production of this phytotoxin. How cello-oligosaccharides are sensed or transported in order to induce the virulent behavior of S. scabies? Here we report that the cellobiose and cellotriose binding protein CebE, and MsiK, the ATPase providing energy for carbohydrates transport, are the protagonists of the cello-oligosaccharide mediated induction of thaxtomin production in S. scabies. Our work provides the first example where the transport and not the sensing of major constituents of the plant host is the central mechanism associated with virulence of the pathogen. Our results allow to draw a complete pathway from signal transport to phytotoxin production where each step of the cascade is controlled by CebR, the cellulose utilization regulator. We propose the high affinity of CebE to cellotriose as possible adaptation of S. scabies to colonize expanding plant tissue. Our work further highlights how genes associated with primary metabolism in nonpathogenic Streptomyces species have been recruited as basic elements of virulence in plant pathogenic species.
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Affiliation(s)
- Samuel Jourdan
- Centre for Protein Engineering, Integrative Biological Sciences (InBioS) Research Unit, University of Liège, Institut de Chimie B6a, B-4000, Liège, Belgium
| | - Isolde Maria Francis
- Department of Biology, California State University Bakersfield, Bakersfield, CA 93311-1022, USA
- Department of Plant Pathology, University of Florida, Gainesville, FL 32611-0180, USA
| | - Min Jung Kim
- Department of Plant Pathology, University of Florida, Gainesville, FL 32611-0180, USA
| | - Joren Jeico C. Salazar
- Department of Biology, California State University Bakersfield, Bakersfield, CA 93311-1022, USA
| | - Sören Planckaert
- Laboratory for Protein Biochemistry and Biomolecular Engineering, Department of Biochemistry and Microbiology, Ghent University, B-9000, Ghent, Belgium
| | - Jean-Marie Frère
- Centre for Protein Engineering, Integrative Biological Sciences (InBioS) Research Unit, University of Liège, Institut de Chimie B6a, B-4000, Liège, Belgium
| | - André Matagne
- Centre for Protein Engineering, Integrative Biological Sciences (InBioS) Research Unit, University of Liège, Institut de Chimie B6a, B-4000, Liège, Belgium
| | - Frédéric Kerff
- Centre for Protein Engineering, Integrative Biological Sciences (InBioS) Research Unit, University of Liège, Institut de Chimie B6a, B-4000, Liège, Belgium
| | - Bart Devreese
- Laboratory for Protein Biochemistry and Biomolecular Engineering, Department of Biochemistry and Microbiology, Ghent University, B-9000, Ghent, Belgium
| | - Rosemary Loria
- Department of Plant Pathology, University of Florida, Gainesville, FL 32611-0180, USA
| | - Sébastien Rigali
- Centre for Protein Engineering, Integrative Biological Sciences (InBioS) Research Unit, University of Liège, Institut de Chimie B6a, B-4000, Liège, Belgium
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