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  • Title: Rubritalea squalenifaciens sp. nov., a squalene-producing marine bacterium belonging to subdivision 1 of the phylum 'Verrucomicrobia'.
    Author: Kasai H, Katsuta A, Sekiguchi H, Matsuda S, Adachi K, Shindo K, Yoon J, Yokota A, Shizuri Y.
    Journal: Int J Syst Evol Microbiol; 2007 Jul; 57(Pt 7):1630-1634. PubMed ID: 17625207.
    Abstract:
    A taxonomic study was carried out to clarify the status of a Gram-negative, heterotrophic mesophile that was isolated from the marine sponge Halichondria okadai. The strain, designated HOact23(T), was a non-motile, rod-shaped (0.44-0.53x0.65-0.79 microm) bacterium. The strain produced squalene and a red-pink carotenoid pigment. The cell-wall peptidoglycan contained meso-diaminopimelic acid, glutamic acid and alanine. The G+C content of the genomic DNA was 52.4 mol%. The major fatty acids were iso-C(14 : 0) (43.1 %), iso-C(16 : 0) (20.6 %) and anteiso-C(15 : 0) (18.1 %), and the major isoprenoid quinone was MK-9 (90.8 %). Based on 16S rRNA gene sequence data, the strain formed a distinct group within subdivision 1 in the phylum 'Verrucomicrobia'. It showed a range of phenotypic properties that distinguished it from its closest relative, Rubritalea marina Pol012(T) (94.3 % 16S rRNA gene sequence similarity). On the basis of polyphasic taxonomic evidence, it was concluded that strain HOact23(T) should be classified within a novel species in the genus Rubritalea. The name proposed for the taxon is Rubritalea squalenifaciens sp. nov., with the type strain HOact23(T) (=MBIC08254(T)=DSM 18772(T)).
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