Pseudomonas arsenicoxydans sp nov., an arsenite-oxidizing strain isolated from the Atacama desert |
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| Authors: | Victor L. Campos,Cristian Valenzuela,Pablo Yarza,Peter Kä mpfer,Roberto Vidal,C. Zaror,Maria-Angelica Mondaca,Arantxa Lopez-Lopez,Ramon Rosselló -Mó ra |
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| Affiliation: | 1. Microbiology Department, Biological Science Faculty, Concepción University, P.O. Box 160-C, Concepción, Chile;2. EULA-Chile Center, Concepción University, P.O. Box 160-C, Concepción, Chile;3. Marine Microbiology Group, Institut Mediterrani d’Estudis Avançats (CSIC-UIB), 07190, Esporles, Spain;4. Institut für Angewandte Mikrobiologie, Justus-Liebig-Universität Giessen, D-35392 Giessen, Germany;5. Programa de Microbiología y Micología, ICBM, Facultad de Medicina, Universidad de Chile, Santiago de Chile, Chile;6. Chemical Engineering Department, Engineering Faculty, Concepción University, Chile |
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| Abstract: | A Gram-negative, arsenite-oxidizing bacterial strain, designated VC-1, was isolated from sediment samples from the Camarones Valley in the Atacama Desert, Chile. Strain VC-1 was strictly aerobic, oxidase and catalase positive, rod shaped, of about 5.5 μm in length and 0.5–1.0 μm in diameter. It was motile by means of multiple polar flagella. The phylogenetic reconstruction of the 16S rRNA gene sequence, an MLSA study by concatenating six genes, and DDH studies indicated that the strain differed genotypically from its closest relatives and was therefore recognized as a new species within the genus Pseudomonas. Phenotypic analysis combining metabolic tests, fatty acid profiles and MALDI-TOF profiles of total cell extracts supported the classification of the new species for which we propose the designation Pseudomonas arsenicoxydans sp. nov. The type strain is accessible under the culture collection numbers CCUG 58201T and CECT 7543T. |
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| Keywords: | Pseudomonas arsenicoxydans sp. nov. Arsenite oxidation 16S rRNA gene MLSA MALDI-TOF Taxonomy Fatty acid profile Arsenic tolerance |
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