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- W4289861522 abstract "Abstract Aims Psychrotrophs are extremophilic microorganisms that grow optimally in low temperature having many unique bioactive molecules of biotechnological applications. In this study, we characterized a pigment from an arctic bacterium with protective activity towards UV exposure. Methods and results The present research reports isolation and characterization of a psychrotrophic bacteria, RSAP2, from the soil sample of NyAlesund (78°56N, 11°54E), Svalbard, Norway. The strain showed closest 16S rRNA gene sequence similarity (99.9%) with Kocuria indica NIO-1021. RSAP2 is a Gram-positive, coccoid aerobe which produces a yellow pigment. The optimal parameters for pigment production while grown in LB medium were 3% (w/v) NaCl and 4 days of incubation of the culture at 20°C and pH 9 with shaking (180 rpm). The pigment was extracted in methanol and acetone (2:1) and further purified through column chromatography. It was characterized by mass spectrometry, UV–visible, fluorescence, IR, 1H NMR, 13C NMR spectroscopy and CHNS/O analysis. The pigment has a molecular weight of about 258 daltons and the molecular formula was determined as C15H18N2O2 and is a quinoline derivative. We show that the pigment can protect Escherichia coli against UV-mediated mutagenesis. We further demonstrate that the pigment displays a significant antimicrobial effect and in sublethal concentrations it impairs biofilm formation ability of the model organism Staphylococcus aureus. Conclusions The pigment of a psychrotrophic Arctic bacterium, most likely a strain of K. indica, was purified and its chemical structure was determined. The quinoline-based pigment has the ability to protect live cells from UV induced damage. Significance and impact of study Analysis and characterization of this newly isolated quinoline-based pigment is a potential candidate for future application in skin care products." @default.
- W4289861522 created "2022-08-05" @default.
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- W4289861522 date "2022-11-01" @default.
- W4289861522 modified "2023-09-27" @default.
- W4289861522 title "Identification of a novel quinoline-based UV-protective pigment from a psychrotrophic Arctic bacterium" @default.
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- W4289861522 doi "https://doi.org/10.1111/jam.15760" @default.
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