ArticleWorld journal of microbiology & biotechnology2012
Keratinases and sulfide from Bacillus subtilis SLC to recycle feather waste.
Article in World journal of microbiology & biotechnology, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 19 papers.
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Who cites it
19 citing papers in PubMed, 82 citations in OpenAlex.
- Keratinases: microbial sources, mechanisms, and industrial applications in waste valorization.Frontiers in microbiology · 2026Review
- Transcriptomics Reveals the Mechanism of Purpureocillium lilacinum GZAC18-2JMP in Degrading Keratin Material.Current microbiology · 2024Article
- Isolation, identification, and molecular characterization of potential keratinolytic fungus sp. from Southern Assam: relevance to poultry wastes and its biological management.Archives of microbiology · 2024Article
- High keratinase and other types of hydrolase activity of the new strain of Bacillus paralicheniformis.PloS one · 2024Article
- Genome-wide analysis of Keratinibaculum paraultunense strain KD-1Archives of microbiology · 2022Article
- Isolation ofBiology · 2022Article
- A Newly Isolated StrainFrontiers in microbiology · 2022Article
- Determination of the Nutritional Value of Diet ContainingAnimals : an open access journal from MDPI · 2021Article
- Dietary Supplementation of Two-Stage Fermented Feather-Soybean Meal Product on Growth Performance and Immunity in Finishing Pigs.Animals : an open access journal from MDPI · 2021Article
- Article
- Comparative Genomics Analysis of Keratin-DegradingMicroorganisms · 2021Article
- Recombinant expression and biochemical characterization of a novel keratinase BsKER71 from feather degrading bacterium Bacillus subtilis S1-4.AMB Express · 2020Article
- Keratinolytic activity of3 Biotech · 2019Article
- Biodegradation of feather waste by keratinase produced from newly isolatedJournal, genetic engineering & biotechnology · 2018Article
- Extracellular peptidases from Deinococcus radiodurans.Extremophiles : life under extreme conditions · 2015Article
- Biodegradation of hard keratins by two bacillus strains.Jundishapur journal of microbiology · 2014Article
- Arrabidaea chica hexanic extract induces mitochondrion damage and peptidase inhibition on Leishmania spp.BioMed research international · 2014Article
- Feather keratin hydrolysates obtained from microbial keratinases: effect on hair fiber.BMC biotechnology · 2013Article
- Keratinolytic abilities of Micrococcus luteus from poultry waste.Brazilian journal of microbiology : [publication of the Brazilian Society for Microbiology]Article
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Authors and funding
8 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
The aim of this study is to investigate the culture conditions of chicken feather degradation and keratinolytic enzyme production by the recently isolated Bacillus subtilis SLC and to evaluate the potential of the SLC strain to recycle feather waste discarded by the poultry industry. The SLC strain was isolated from the agroindustrial waste of a poultry farm in Brazil and was confirmed to belong to Bacillus subtilis by rDNA gene analysis. There was high keratinase production when the medium was at pH 8 (280 U ml(-1)). Activity was higher using the inoculum propagated for 72 h on 1% whole feathers supplemented with 0.1% yeast extract. In the enzymatic extract, the keratinases were active in the pH range from 2.0 to 12.0 with a maximum activity at pH 10.0 and temperature 60°C. For gelatinase the best pH was 5.0 and the best temperature was 37°C. All keratinases are serine peptidases. The crude enzymatic extract degraded keratin, gelatin, casein, and hemoglobin. Scanning electron microscopy showed Bacillus cells adhered onto feather surfaces after 98 h of culture and degraded feather filaments were observed. MALDI-TOF mass spectrometric analysis showed multiple peaks from 522 to 892 m/z indicating feather degradation. The presence of sulfide was detected on extracellular medium probably participating in the breakdown of sulfide bridges of the feather keratin. External addition of sulfide increased feather degradation.
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