title: Labrys portucalensis sp. nov., a fluorobenzene-degrading bacterium isolated from an industrially contaminated sediment in northern Portugal.
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)).
authors.affiliation: Escola Superior de Biotecnologia, Universidade Católica Portuguesa, Rua Dr. António Bernardino de Almeida, 4200-072 Porto, Portugal.
authors.forename: Maria F
authors.initials: MF
authors.lastname: Carvalho
authors.forename: Paolo
authors.initials: P
authors.lastname: De Marco
authors.forename: Anouk F
authors.initials: AF
authors.lastname: Duque
authors.forename: Catarina C
authors.initials: CC
authors.lastname: Pacheco
authors.forename: Dick B
authors.initials: DB
authors.lastname: Janssen
authors.forename: Paula M L
authors.initials: PM
authors.lastname: Castro
mesh_terms: D020561:Alphaproteobacteria / Q000145:classification* / Q000235:genetics / Q000302:isolation & purification; D015373:Bacterial Typing Techniques; D001482:Base Composition; D001673:Biodegradation, Environmental; D004269:DNA, Bacterial / Q000032:analysis; D004275:DNA, Ribosomal / Q000032:analysis; D005227:Fatty Acids / Q000032:analysis; D005464:Fluorobenzenes / Q000378:metabolism*; D020459:Genes, rRNA; D019015:Geologic Sediments / Q000382:microbiology*; D007221:Industry; D008969:Molecular Sequence Data; D009693:Nucleic Acid Hybridization; D010802:Phylogeny; D011174:Portugal; D012336:RNA, Ribosomal, 16S / Q000235:genetics; D017422:Sequence Analysis, DNA; D012989:Soil Pollutants; D013045:Species Specificity
chemical_list: D004269:DNA, Bacterial; D004275:DNA, Ribosomal; D005227:Fatty Acids; D005464:Fluorobenzenes; D012336:RNA, Ribosomal, 16S; D012989:Soil Pollutants