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Note: Studies on the phylogenetic relationships of melanogenic marine bacteria: Proposal of Marinomonas mediterranea sp. nov.

¹Departments of Biochemistry and Molecular Biology B, University of Murcia, Murcia 30100, Spain
²Genetics and Microbiology, University of Murcia, Murcia 30100, Spain

Author for correspondence: Antonio Sanchez-Amat. Tel: +34 968 364955. Fax: +34 968 363963. e-mail: antonio{at}fcu.um.es

ABSTRACT

The polyphenol oxidase (PPO) activities of the marine melanogenic strains MMB-1^T and 2–40 were compared. Both contained a multifunctional PPO able to oxidize a wide range of substrates. In spite of this similarity, phylogenetic studies based on 16S rRNA sequences showed that these strains are not closely related. Strain 2–40 is not related to any previously described genus. On the basis of these studies and morphological and physiological characteristics, it is proposed that strain MMB-1^T (= CECT 4803^T = ATCC 700492^T) represents a new species in the genus Marinomonas, Marinomonas mediterranea sp. nov.

Key Words: Melanin • polyphenol oxidases • strain MMB-1^T • strain 2–40 • Marinomonas mediterranea sp. nov.

The GenBank accession numbers for the 16S rRNA sequences of strains MMB-1^T (complete) and 2–40 (first 519 nucleotides) are AF063027 and AF063028.

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