1887

International Journal of Systematic and Evolutionary Microbiology

Volume 54, Issue 4

sp. nov., a polyunsaturated fatty acid-producing bacterium isolated from sea water Free

Abstract

Six marine bacterial strains, KMM 3597, KMM 3775, KMM 3590, KMM 3772, KMM 3605 and KMM 3601, that produce polyunsaturated fatty acids were isolated from sea water samples collected from different locations and depths in Chazhma Bay (Sea of Japan, Pacific Ocean) and characterized to clarify their taxonomic position. The DNA G+C contents of these strains were 39·5–40·3 mol%. The level of DNA hybridization between these strains was conspecific (83–96 %), indicating that they represent a single genospecies. 16S rRNA gene sequence-based phylogenetic analysis of the novel strains revealed that KMM 3299 was the closest relative (99 % similarity). However, DNA–DNA hybridization experiments demonstrated only 45–50 % binding with DNA of . The novel organisms grew between 4 and 33 °C, were neutrophilic and haemolytic, and were able to degrade starch, gelatin, agar and Tween 80. The predominant fatty acids were (%±): i13 : 0 (9·3±1·1); i15 : 0 (33·9±1·5); 16 : 0 (8·9±1·6); and 16 : 17 (14·8±1·1). The fatty acid 20 : 53, formed at 28 °C, was present at up to 5·3 % total fatty acids. The major isoprenoid quinones were Q7 (21–41 %) and Q8 (50–59 %). The phylogenetic, genetic and physiological properties of the six strains placed them within a novel species, sp. nov., the type strain of which is R10SW1 (=KMM 3597=CIP 107849).

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Keyword(s): EPA, eicosapentaenoic acid and PUFA, polyunsaturated fatty acid
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2004-07-01
2019-12-06
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Shewanella pacifica sp. nov., a polyunsaturated fatty acid-producing bacterium isolated from sea water
Int J Syst Evol Microbiol 54, 1083 (2004); https://doi.org/10.1099/ijs.0.02993-0
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vol. , part 4, pp. 1083–1087

Tables showing the cellular fatty acid and isoprenoid quinone compositions and comparative fatty acid compositions of and related species are available to download. [PDF](139KB)

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