RESUMEN
Strain JW12T, isolated from surface seawater of the Arabian Sea, was subjected to characterization by a polyphasic taxonomic approach. Cells of the isolate were Gram-stain-negative, aerobic and rod-shaped. It accumulated poly-ß-hydroxybutyrate. On the basis of 16S rRNA gene sequence analysis, strain JW12T was closely related to Alteromonas confluentis, with 16S rRNA gene sequence similarity of 98.0â%. Phylogenetic analysis revealed that it fell within the cluster of the genus Alteromonas and represented one independent lineage with A. confluentis. The average nucleotide identity (ANI) value and the genome-to-genome distance between strain JW12T and A. confluentis KCTC 42603T were 70.0 and 21.3â%, respectively. The sole respiratory quinone was ubiquinone-8 (Q8). The principal fatty acids were summed feature 3 (C16â:â1ω7c and/or iso-C15â:â0 2-OH), C16â:â0 and C18â:â1ω7c. The major polar lipids included phosphatidylethanolamine, phosphatidylglycerol, two unidentified glycolipids and one aminophospholipid. The DNA G+C content was 48.4 mol%. Differential phylogenetic distinctiveness and chemotaxonomic differences, together with phenotypic properties obtained in this study, revealed that strain JW12T could be differentiated from the closely related species. Therefore, it is proposed that strain JW12T represents a novel species in the genus Alteromonas, for which the name Alteromonas lipolytica sp. nov. (type strain, JW12T=CGMCC 1.15735T=KCTC 52408T=MCCC 1K03175T), is proposed.
Asunto(s)
Alteromonas/clasificación , Hidroxibutiratos/metabolismo , Filogenia , Poliésteres/metabolismo , Agua de Mar/microbiología , Alteromonas/genética , Alteromonas/aislamiento & purificación , Técnicas de Tipificación Bacteriana , Composición de Base , ADN Bacteriano/genética , Ácidos Grasos/química , Océano Índico , Hibridación de Ácido Nucleico , Fosfolípidos/química , ARN Ribosómico 16S/genética , Análisis de Secuencia de ADNRESUMEN
Thirty-five isolates obtained from a marine electroactive biofilm grown on a stainless steel cathode (Genoa, Italy) were investigated by a polyphasic taxonomic approach. Whole-cell fatty acid methyl ester analysis indicated that the isolates belonged to the class Gammaproteobacteria and were closely related or belonging to the genus Alteromonas. Genomic fingerprinting using the BOX-PCR primer delineated five clusters of isolates with similar BOX-PCR fingerprints. This study demonstrated that isolates from four of the BOX-PCR clusters belonged to Alteromonas macleodii and that the 14 isolates representing BOX-PCR cluster 1 constituted a novel species, which shared 98.4 % 16S rRNA gene sequence similarity with its nearest phylogenetic neighbour, Alteromonas hispanica. Both phenotypic and genotypic analyses enabled this novel species, for which the name Alteromonas genovensis sp. nov. is proposed, to be differentiated from established species of the genus Alteromonas. The DNA G+C content of Alteromonas genovensis sp. nov. is 44.5 mol% and the type strain is LMG 24078(T) (=CCUG 55340(T)).
Asunto(s)
Alteromonas/clasificación , Biopelículas/crecimiento & desarrollo , Electrodos/microbiología , Agua de Mar/microbiología , Alteromonas/genética , Alteromonas/aislamiento & purificación , Alteromonas/fisiología , Técnicas de Tipificación Bacteriana , Composición de Base , Dermatoglifia del ADN , ADN Bacteriano/análisis , ADN Ribosómico/análisis , Genes de ARNr , Genotipo , Italia , Datos de Secuencia Molecular , Fenotipo , Filogenia , Reacción en Cadena de la Polimerasa/métodos , ARN Ribosómico 16S/genética , Análisis de Secuencia de ADN , Especificidad de la Especie , Acero InoxidableRESUMEN
On the basis of phenotypic, genotypic characteristics and analysis of 16S rRNA gene sequences, a novel species belonging to the genus Alteromonas is described. A non-pigmented, motile, Gram-negative bacterium designated R10SW13(T) was isolated from sea water samples collected in Chazhma Bay (Sea of Japan, Pacific Ocean). The novel organism mainly grew between 4 degrees C and 37 degrees C, was neutrophilic and slightly halophilic, tolerating up to 10 % NaCl. Strain R10SW13(T) was haemolytic and was able to degrade starch and Tween 80 and to degrade gelatin and agar weakly, but did not degrade casein. Phosphatidylethanolamine (44.3 +/- 0.9 %) and phosphatidylglycerol (55.7 +/ -0.9 %) were the predominant phospholipids. The major fatty acids formed were typical for the genus Alteromonas, including 16 : 0, 16 : 1omega-7 and 18 : 1omega-7. The G + C content of the DNA was 43.4 mol%. DNA-DNA hybridization experiments showed 38-53 % binding with the DNAs of type strains of phylogenetically related species of the genus Alteromonas, namely: Alteromonas macleodii, Alteromonas marina, Alteromonas stellipolaris, Alteromonas litorea, 'Alteromonas macleodii subsp. fijiensis' and 'Alteromonas infernus'. Based on these results, a novel species, Alteromonas addita sp. nov., is proposed, with strain R10SW13(T) (=KMM 3600(T) = KCTC 12195(T) = LMG 22532(T)) as the type strain.