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Bacillus saliphilus sp nov., isolated from a mineral pool in Campania, Italy (Articolo in rivista)

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Bacillus saliphilus sp nov., isolated from a mineral pool in Campania, Italy (Articolo in rivista) (literal)

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Romano I; Lama L; Nicolaus B; Gambacorta A; Giordano A. (2005)
Bacillus saliphilus sp nov., isolated from a mineral pool in Campania, Italy
in International journal of systematic and evolutionary microbiology (Print)
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Halo-alkaliphilic Gram-positive bacterium 6AGT, that grow aerobically at the optimum temperature of 37°C and at pH 7-10 (optimum 9.0), was isolated from algal mat from mineral pool located in Malvizza in Campania Region (South of Italy). The isolate tolerated high concentrations of NaCl up to 25%. On the basis of 16S rRNA gene sequence similarity, the strain was shown to belong to Bacillus genus. Analysis of 16S rRNA gene revealed a high similarity between strain 6AGT and unidentified soda Hailer isolate (99.9% identity) and two kenyan isolates 3E1T and WE4T (98.3 and 97.8 % identity, respectively). The G+C content (mol %) of DNA was 48.4. The predominant respiratory quinones are MK7(H2), MK7(H4), DMK7(H2); phosphatidylglycerol and diphosphatidylglycerol were the predominant polar lipids. iC15:0 and aiC15:0 were the major fatty acids. Strain 6AGT accumulated osmolytes. The phylogenetic distance of strain 6AGT from any validly described species within the genus Bacillus allowed us to classify it as Bacillus saliphilus sp. nov with the type strain 6AGT (=DSM 15402T, = ATCC BAA-957). The new isolate possessed an interesting halophilic alfa-glycosidase. (literal)

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Istituto di Chimica Biomolecolare, Comprensorio Ex Olivetti, I-80078 Pozzuoli, NA, Italy (literal)

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Bacillus saliphilus sp nov., isolated from a mineral pool in Campania, Italy (literal)

Abstract

A halo-alkaliphilic, Gram-positive, non-motile bacterium, designated strain 4AG(T), was isolated from a mineral pool located in Malvizza, Campania, southern Italy. On the basis of 16S rRNA gene sequence analysis, strain 4AG(T) was shown to belong to the genus Alkalibacillus within the phylum Firmicutes; its phylogenetic distance from recognized Alkalibacillus species was < 95(.)0 %. Chemotaxonomic data (MK-7 as the major menaquinone; directly cross-linked meso-diaminopimelic acid in the cell wall; phosphatidylglycerol and diphosphatidylglycerol as major polar lipids; iso-C-15:0, anteiso-C-15:0 and iso-C-17:0 as major fatty acids; and glycine betaine and glutamate as major compatible solutes) supported the affiliation of the strain to the genus Alkalibacillus. The results of DNA-DNA hybridization and physiological and biochemical tests allowed genotypic and phenotypic differentiation of strain 4AG(T) from the two recognized Alkalibacillus species. Strain 4AG(T) therefore represents a novel species, for which the name Alkalibacillus filiformis sp. nov. is proposed. The type strain is 4AG(T) (=DSM 15448(T)=ATCC BAA-956(T)). (literal)

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