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Thalassobacter stenotrophicus gen. nov., sp. nov., a novel marine -proteobacterium isolated from Mediterranean sea water

¹ Instituto Cavanilles de Biodiversidad y Biología Evolutiva, Universitat de València, Campus de Burjassot, 46100 València, Spain
² Departamento de Microbiología y Ecología, Facultad de Biología, Universitat de València, Campus de Burjassot, 46100 València, Spain
³ Colección Española de Cultivos Tipo (CECT), Facultad de Biología, Universitat de València, Campus de Burjassot, 46100 València, Spain
⁴ Lehrstuhl für Mikrobiologie, Technische Universität München, Am Hochanger 4, D-85350 Freising, Germany

Correspondence
M. J. Pujalte
maria.j.pujalte{at}uv.es

A Gram-negative, slightly halophilic, strictly aerobic, chemo-organotrophic bacterium was isolated from Mediterranean sea water near Valencia (Spain). 16S rRNA gene sequence comparisons showed that the isolate represented a separate branch within the -3 subclass of the Proteobacteria, now included within the order ‘Rhodobacterales’. Jannaschia helgolandensis was the closest relative, but their low sequence similarity and other features indicated that they were not related at the genus level. Isolate 5SM22^T produced bacteriochlorophyll a and grew on solid media as regular salmon-pink colonies. Cells are motile rods, with polar flagella. The DNA G+C content is 59·1 mol%. Morphological, physiological and genotypic differences from related, thus far known genera support the description of Thalassobacter stenotrophicus gen. nov., sp. nov. with strain 5SM22^T (=CECT 5294^T=DSM 16310^T) as the type strain.

Published online ahead of print on 30 July 2004 as DOI 10.1099/ijs.0.63275-0.

The GenBank/EMBL/DDBJ accession number for the 16S rRNA gene sequence of Thalassobacter stenotrophicus CECT 5294^T is AJ631302.

Scanning electron micrographs of cell division and the results of cellular fatty acid analysis are available as supplementary data in IJSEM Online.

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