title: Shewanella olleyana sp. nov., a marine species isolated from a temperate estuary which produces high levels of polyunsaturated fatty acids.
abstract: Two polyunsaturated fatty acid (PUFA) producing strains (ACEM 6 and ACEM 9(T)) isolated from a temperate, humic-rich river estuary in Tasmania, Australia, were found to be members of the genus Shewanella. These strains were able to utilize humic compounds (tannic acid) and derivatives (2,6-anthraquinone disulfonate) as sole carbon sources and as electron acceptors for anaerobic respiration. The major fatty acids were typical of the genus Shewanella; however, PUFAs mostly made up of eicosapentaenoic acid were produced at high levels (10.2-23.6% of total fatty acids) and at relatively high incubation temperatures (10.2% at 24 degrees C). Sequence analysis indicated that ACEM 6 and ACEM 9(T) had identical 16S rDNA sequences and were most closely related to Shewanella japonica (sequence similarity 97.1%). DNA hybridization and phenotypic characteristics confirmed that the isolates constituted a novel species of the genus Shewanella, which is designated Shewanella olleyana sp. nov. (type strain ACEM 9(T) = ACAM 644(T) = LMG 21437(T)).
authors.forename: Jennifer H
authors.initials: JH
authors.lastname: Skerratt
authors.forename: John P
authors.initials: JP
authors.lastname: Bowman
authors.forename: Peter D
authors.initials: PD
authors.lastname: Nichols
mesh_terms: D004269:DNA, Bacterial / Q000235:genetics; D004275:DNA, Ribosomal / Q000235:genetics; D005231:Fatty Acids, Unsaturated / Q000096:biosynthesis*; D005618:Fresh Water / Q000382:microbiology; D008969:Molecular Sequence Data; D010641:Phenotype; D010802:Phylogeny; D012329:RNA, Bacterial / Q000235:genetics; D012336:RNA, Ribosomal, 16S / Q000235:genetics; D020592:Shewanella / Q000145:classification* / Q000235:genetics / Q000302:isolation & purification / Q000378:metabolism*; D013648:Tasmania
chemical_list: D004269:DNA, Bacterial; D004275:DNA, Ribosomal; D005231:Fatty Acids, Unsaturated; D012329:RNA, Bacterial; D012336:RNA, Ribosomal, 16S