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  • Title: Labrys portucalensis sp. nov., a fluorobenzene-degrading bacterium isolated from an industrially contaminated sediment in northern Portugal.
    Author: Carvalho MF, De Marco P, Duque AF, Pacheco CC, Janssen DB, Castro PM.
    Journal: Int J Syst Evol Microbiol; 2008 Mar; 58(Pt 3):692-8. PubMed ID: 18319480.
    Abstract:
    A detailed classification of a novel bacterial strain, designated F11(T), capable of degrading fluorobenzene as a sole carbon and energy source, was performed by using a polyphasic approach. This Gram-negative, rod-shaped, non-motile, non-spore-forming, aerobic bacterium was isolated from a sediment sample collected from an industrially contaminated site in northern Portugal. The predominant whole-cell fatty acids were C(19 : 0) cyclo omega8c, C(16 : 0), C(18 : 1)omega7c, C(18 : 0), C(18 : 0) 3-OH and C(16 : 0) 3-OH. The G+C content of the DNA was 62.9 mol% and the major respiratory quinone was ubiquinone 10 (UQ-10). 16S rRNA gene sequence analysis revealed that strain F11(T) was a member of the class Alphaproteobacteria and was phylogenetically related to the genus Labrys, having sequence similarities of 95.6 and 93.1 % to the type strains of Labrys monachus and Labrys methylaminiphilus, respectively. DNA-DNA hybridization experiments revealed levels of relatedness of <70 % between strain F11(T) and the type strains of L. monachus and L. methylaminiphilus (38.6 and 34.1 %, respectively), justifying the classification of strain F11(T) as representing a novel species of the genus Labrys. The name Labrys portucalensis sp. nov. is proposed for this organism. The type strain is F11(T) (=LMG 23412(T)=DSM 17916(T)).
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