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  • Title: Bacillus invictae sp. nov., isolated from a health product.
    Author: Branquinho R, Sousa C, Osório H, Meirinhos-Soares L, Lopes J, Carriço JA, Busse HJ, Abdulmawjood A, Klein G, Kämpfer P, Pintado ME, Peixe LV.
    Journal: Int J Syst Evol Microbiol; 2014 Nov; 64(Pt 11):3867-3876. PubMed ID: 25171924.
    Abstract:
    A Gram-positive, rod-shaped, endospore-forming Bacillus isolate, Bi.(FFUP1) (T), recovered in Portugal from a health product was subjected to a polyphasic study and compared with the type strains of Bacillus pumilus, Bacillus safensis, Bacillus altitudinis and Bacillus xiamenensis, the phenotypically and genotypically most closely related species. Acid production from cellobiose, D-glucose and D-mannose and absence of acid production from D-arabinose, erythritol, inositol, maltose, mannitol, raffinose, rhamnose, sorbitol, starch and L-tryptophan discriminated this new isolate from the type strains of the most closely related species. Additionally, a significant different protein and carbohydrate signature was evidenced by spectroscopic techniques, matrix-assisted laser desorption/ionization time-of-flight mass spectrometry and Fourier transform IR spectroscopy with attenuated total reflectance. Using a chemometric approach, the score plot generated by principal component analysis clearly delineated the isolate as a separate cluster. The quinone system for strain Bi.(FFUP1) (T) comprised predominantly menaquinone MK-7 and major polar lipids were diphosphatidylglycerol, an unidentified phospholipid and an unidentified glycolipid. Strain Bi.(FFUP1) (T) showed ≥ 99% 16S rRNA gene sequence similarity to B. safensis FO-036b(T), B. pumilus (7061(T) and SAFR-032), B. altitudinis 41KF2b(T) and B. xiamenensis HYC-10(T). Differences in strain Bi.FFUP1 (T) gyrB and rpoB sequences in comparison with the most closely related species and DNA-DNA hybridization experiments with Bi.FFUP1 (T) and B. pumilus ATCC 7061(T), B. safensis FO-036b(T), B. altitudinis 41KF2b(T) and B. xiamenensis HYC-10(T) gave relatedness values of 39.6% (reciprocal 38.0%), 49.9% (reciprocal 42.9%), 61.9% (reciprocal 52.2%) and 61.7% (reciprocal 49.2%), respectively, supported the delineation of strain Bi.(FFUP1) (T) as a representative of a novel species of the genus Bacillus, for which the name Bacillus invictae sp. nov. is proposed, with strain Bi.(FFUP1) (T) ( =DSM 26896(T) =CCUG 64113(T)) as the type strain.
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