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• W2903674582 abstract "Discarded feathers represent an important residue from the poultry industry and are a rich source of keratin. Bacillus subtilis LFB-FIOCRUZ 1266, previously isolated from industrial poultry wastes, was used in this work and, through random mutation using ethyl methanesulfonate, ten strains were selected based on the size of their degradation halos. The feather degradation was increased to 115% and all selected mutants showed 1.4- to 2.4-fold increase in keratinolytic activity compared to their wild-type counterparts. The protein concentrations in the culture supernatants increased approximately 2.5 times, as a result of feather degradation. The mutants produced more sulfide than the wild-type bacteria that produced 0.45 µg/ml, while mutant D8 produced 1.45 µg/ml. The best pH for enzyme production and feather degradation was pH 8. Zymography showed differences in the intensity and molecular mass of some bands. The peptidase activity of the enzyme blend was predominantly inhibited by PMSF and EDTA, suggesting the presence of serine peptidases. HPTLC analysis evidenced few differences in band intensities of the amino acid profiles produced by the mutant peptidase activities. The mutants showed an increase in keratinolytic and peptidase activities, demonstrating their biotechnological potential to recycle feather and help to reduce the environmental impact." @default.
• W2903674582 created "2018-12-22" @default.
• W2903674582 creator A5033456016 @default.
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• W2903674582 date "2018-12-10" @default.
• W2903674582 modified "2023-10-03" @default.
• W2903674582 title "Keratinolytic activity of Bacillus subtilis LFB-FIOCRUZ 1266 enhanced by whole-cell mutagenesis" @default.
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• W2903674582 doi "https://doi.org/10.1007/s13205-018-1527-1" @default.
• W2903674582 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/6288049" @default.
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• W2903674582 hasPublicationYear "2018" @default.
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