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Int J Syst Evol Microbiol 58 (2008), 383-386; DOI  10.1099/ijs.0.65103-0
© 2008 International Union of Microbiological Societies

Paracoccus marinus sp. nov., an adonixanthin diglucoside-producing bacterium isolated from coastal seawater in Tokyo Bay

Shams Tabrez Khan1, Shinichi Takaichi2 and Shigeaki Harayama1

1 Biological Resource Center (NBRC), National Institute of Technology and Evaluation (NITE), 2-5-8, Kazusakamatari, Kisarazu-shi, Chiba 292-0818, Japan
2 Biological Laboratory, Nippon Medical School, Kosugi-cho 2, Nakahara, Kawasaki 211-0063, Japan

Correspondence
Shams Tabrez Khan
shams-tabrez-khan{at}nite.go.jp

Two novel marine, Gram-negative, non-motile, catalase- and oxidase-positive, aerobic bacteria were isolated from coastal seawater in Tokyo Bay. Analysis of almost-complete 16S rRNA gene sequences showed that the two isolates are members of the genus Paracoccus, sharing highest 16S rRNA gene sequence similarity (96.5 %) with Paracoccus aminophilus NBRC 16710T. The DNA–DNA reassociation values between P. aminophilus NBRC 16710T and these isolates were only 10–20 %, in contrast to the high DNA relatedness between the two isolates (89 %). At least 1 % (w/v) NaCl was required for growth. Cellular fatty acid profiles revealed C18 : 1{omega}7c as the major component and C10 : 0 3-OH as the major hydroxy fatty acid. Ubiquinone-10 was detected as the major respiratory quinone. The G+C content of the genomic DNA of both strains was 69 mol%. On the basis of DNA–DNA hybridization data and physiological and chemotaxonomic characteristics, it is proposed that these strains should be placed in a novel species, Paracoccus marinus sp. nov. The type strain is KKL-A5T (=NBRC 100637T =CIP 108500T); KKL-B9 (=NBRC 100640) is a reference strain.

Abbreviations: DAPI, 4',6-diamidino-2-phenylindole

The GenBank/EMBL/DDBJ accession numbers for the 16S rRNA gene sequences of strains KKL-A5T and KKL-B9 are AB185957 and AB185959, respectively.






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