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Int J Syst Evol Microbiol 59 (2009), 1856-1861; DOI  10.1099/ijs.0.007708-0
© 2009 International Union of Microbiological Societies

Muricauda olearia sp. nov., isolated from crude-oil-contaminated seawater, and emended description of the genus Muricauda

Chung Y. Hwang1, Min H. Kim2, Gi D. Bae1, Gwang I. Zhang1, Young H. Kim2,3 and Byung C. Cho1

1 School of Earth and Environmental Sciences and Research Institute of Oceanography, Seoul National University, San 56-1, Shillim-dong, Kwanak-gu, Seoul 151-742, Republic of Korea
2 Department of Life Science, College of Natural Sciences, The University of Suwon, Hwaseong 445-743, Republic of Korea
3 Research Institute of Mazzeebio Co., Dongnam Bldg 501, Nonhyeon-dong, Gangnam-gu, Seoul, Republic of Korea

Correspondence
Byung C. Cho
bccho{at}snu.ac.kr

A Gram-staining-negative, rod-shaped and non-motile bacterium, designated CL-SS4T, was isolated from crude-oil-contaminated seawater from the west coast of Korea and was investigated by means of a polyphasic taxonomic approach. Strain CL-SS4T grew optimally at 25–30 °C, at pH 6.8–7.7 and in the presence of 2–3 % sea salts. The major fatty acids were iso-C17 : 0 3-OH, iso-C15 : 0 and iso-C15 : 1 G. The major isoprenoid quinone was MK-6. The DNA G+C content was 50.7 mol%. Analysis of the 16S rRNA gene sequence of strain CL-SS4T revealed that it was a member of the genus Muricauda, sharing 95.7–96.9 % sequence similarity with the type strains of Muricauda species and being most closely related to Muricauda aquimarina SW-63T. Phylogenetic analyses based on 16S rRNA gene sequences confirmed that strain CL-SS4T formed a deep lineage related to the genus Muricauda. Strain CL-SS4T was distinguishable from recognized Muricauda species on the basis of differential phenotypic characteristics and DNA G+C content. Based on these results, it is proposed that strain CL-SS4T represents a novel species of the genus Muricauda, for which the name Muricauda olearia sp. nov. is proposed. An emended description of the genus Muricauda is also proposed. The type strain is CL-SS4T (=KCCM 90075T=JCM 15563T).

The GenBank/EMBL/DDBJ accession number for the 16S rRNA gene sequence of strain CL-SS4T is EU888117.






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