Abstract
Lysobacter is known as a bacterial genus with biotechnological potential, producing an array of enzymes, antimicrobial metabolites, and bioactive antioxidant compounds, including aryl polyene (APE) pigments that have been described as protecting substances against photooxidative damage and lipid peroxidation. In this study, the pigment extracted from keratinolytic Lysobacter sp. A03 isolated from Antarctic environment was characterized. The results of KOH test, UV-vis spectroscopy, CIELAB color system, 1H-NMR, and FTIR-ATR spectroscopy suggest the pigment is a yellow xanthomonadin-like pigment. The in vitro antioxidant activity of the pigment was confirmed by the scavenging of ABTS and DPPH radicals. In silico analysis of the genome through antiSMASH software was also performed and the secondary metabolite gene clusters for APE and resorcinol synthesis were identified, suggesting that proteins responsible for the pigment biosynthesis are encoded in Lysobacter A03 genome.
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