NDLI: Screening of Bacteria for Protease Production and Feather Degradation

Content Provider	Springer Nature Link
Author	Oliveira, Caroline Torres Pellenz, Leandro Pereira, Jamile Queiroz Brandelli, Adriano Daroit, Daniel Joner
Copyright Year	2016
Abstract	Feathers are recalcitrant wastes produced by the poultry industry. Considering potential environmental hazards and the need for energy conservation/recycling, adequate approaches are demanded for feathers reclamation. Microbial conversion is an interesting alternative from both technological and economical perspectives. Therefore, 15 bacterial strains were isolated from a site containing waste feathers, and evaluated for proteolytic and keratinolytic potentials. From these bacterial isolates, seven produced extracellular proteases in milk agar plates, also demonstrating the ability to grow on feather meal agar plates, preferentially at pH values from 7 to 9, and at 30–37 °C. The isolate named CL33A displayed higher efficiency for feather degradation in qualitative assays, and selected for studies in feather broth (FB), a medium containing whole feathers (10 g/L) as the sole source of carbon, nitrogen and energy. CL33A degraded 29, 75, and 95 % of the feathers in FB, after 96, 144 and 216 h of growth, respectively. Feather degradation was corroborated by increases in soluble protein concentration and medium pH. Production of proteolytic enzymes reached maximal values after 216–240 h of growth on FB, and CL33A also produced proteases when cultivated in feather meal, peptone, and soy protein isolate. Through 16S rRNA gene sequencing, this feather-degrading isolate was identified as Bacillus sp. CL33A. Bioprocessing could be a suitable technology aiming the management and valorization of feathers/feather meal, due to the production of protein hydrolysates and also proteolytic enzymes that could be used as important biocatalysts.
Starting Page	447
Ending Page	453
Page Count	7
File Format	PDF
ISSN	18772641
Journal	Waste and Biomass Valorization
Volume Number	7
Issue Number	3
e-ISSN	1877265X
Language	English
Publisher	Springer Netherlands
Publisher Date	2016-01-12
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Functional screening Proteolytic potential Waste feathers Feather degradation Protease production Engineering Environment Renewable and Green Energy Industrial Pollution Prevention Waste Management/Waste Technology Environmental Engineering/Biotechnology
Content Type	Text
Resource Type	Article
Subject	Waste Management and Disposal Environmental Engineering Renewable Energy, Sustainability and the Environment

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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