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Marinomonas ushuaiensis sp. nov., isolated from coastal sea water in Ushuaia, Argentina, sub-Antarctica

¹ Centre for Cellular and Molecular Biology, Uppal Road, Hyderabad 500 007, India
² Observatoire Oceanoloquie de Banyuls, Laboratoire Arago, Université Pierre et Marie Curie (Paris VI), Institut National des Sciences de L'Univers, BP 44 – 66651, Banyuls sur Mer, France

Correspondence
S. Shivaji
shivas{at}ccmb.res.in

A Gram-negative, rod-shaped, psychrophilic, motile, non-spore-forming bacterium, strain U1^T, was isolated from Ushuaia located at the southernmost tip of Argentina. On the basis of 16S rRNA gene sequence similarity, strain U1^T was found to be closely related to Marinomonas communis (DSM 5604^T) and Marinomonas primoryensis (IAM 15010^T). At the DNA–DNA level, however, the values for similarity were 41 and 25 %, respectively. The major fatty acids present were iso-C_{16 : 0}, C_{16 : 1}7c, iso-C_{17 : 1} and C_{18 : 1}7c and the G+C content of the DNA was 43·6 mol%. All of the above characteristics support the affiliation of strain U1^T to the genus Marinomonas. Furthermore, on the basis of phenotypic features, chemotaxonomic characteristics and phylogenetic analysis of the 16S rRNA gene sequence, it appears that strain U1^T is distinct from the four Marinomonas species with validly published names. Strain U1^T, therefore, represents a novel species, for which the name Marinomonas ushuaiensis sp. nov. is proposed. The type strain of M. ushuaiensis is U1^T (=MTCC 6143^T=DSM 15871^T=JCM 12170^T).

The GenBank/EMBL/DDBJ accession number for the 16S rRNA gene sequence of strain U1^T is AJ627909.

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