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- W3198623591 abstract "Abstract Keratinases are enzymes with the most diverse sources and applications. Different forms of keratinase have been applied in environment and variety of industries, highlighting the necessity for novel potential keratinases, which could be applicable in variety of industries. Accordingly, the present study aimed to identify and characterize a novel keratinase producing bacterium with high potential in variety of industries. In the present study, the native isolate of Bacillus sp. FUM125 was isolated, identified and optimized for the keratinolytic activity. The keratinase was purified and characterized using biochemical assays. The Bacillus sp. FUM125 isolate was identified as Bacillus mojavensis R-OH-1 with 99.8% similarity. The isolate showed the maximum keratinolytic activity at pH of 8.5 after 24-hour incubation at 37°C (2.1-fold enzyme production). According to the biochemical analysis, the keratinase belonged to a serine protease family, whit 33.5 kDa molecular weight and was stable in a wide range of pH and temperature with maximum keratinolytic activity at 60°C and pH 8. Among the metal ions, K + , Ca 2+ , Na 2+ and Mg 2+ increased the enzyme activity. The activity was increased by the reducing agents of DTT and beta-mercaptoethanol. Based on the substrate profile findings, the enzyme was active in various soluble and insoluble substrates. The enzyme showed a half-life of 98 min in the optimal temperature and the ratio of keratinolytic:caseinolytic to be 0.95. Our enzyme with higher temperature and pH stability compared to existing commercial enzymes can be considered as a potential candidate for use in various industries." @default.
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- W3198623591 date "2021-08-30" @default.
- W3198623591 modified "2023-09-23" @default.
- W3198623591 title "Characterization of a Novel Keratinase With Surfactant Stability in a Wide Range of pH Activity From a Native Isolate, Bacillus Mojavensis FUM125" @default.
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- W3198623591 doi "https://doi.org/10.21203/rs.3.rs-843668/v1" @default.
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