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Purification and characterization of a keratinolytic serine protease from Purpureocillium lilacinum LPS # 876

Paper ID Volume ID Publish Year Pages File Format Full-Text
34751 45042 2013 7 PDF Available
Title
Purification and characterization of a keratinolytic serine protease from Purpureocillium lilacinum LPS # 876
Abstract

•This is the first report of a serine protease with keratinolytic activity from P. lilacinus LPS # 876.•Enzyme stability in broad pH range, and up to 65 °C, suggests its suitability as a detergent additive.•Oxidant/detergent stability strengthens the enzyme's potential application as laundry additive.•The production of this enzyme could be an alternative for solid waste management processes, an added valued product for tanneries.

A keratinolytic serine protease secreted by Purpureocillium lilacinum (formerly Paecilomyces lilacinus) upon culture in a basal medium containing 1% (w/v) hair waste as carbon and nitrogen source was purified and characterized. After purification the keratinase was resolved by SDS-PAGE as a homogeneus protein band of molecular mass 37.0 kDa. The extracellular keratinase of P. lilacinum was characterized by its appreciable stability over a broad pH range (from 4.0 to 9.0), and up to 65 °C, along with its strong inhibition by phenylmethylsulphonyl fluoride among the protease inhibitors tested (98.2% of inhibition), thus suggesting its nature as a serine protease. The enzyme was active and stable in the presence of organic solvents such as dimethylsulfoxide, methanol, and isopropanol; certain surfactants such as Triton X-100, sodium dodecylsulfate, and Tween 85; and bleaching agents such as hydrogen peroxide. These biochemical characteristics suggest the potential use of this enzyme in numerous industrial applications.

Keywords
Enzyme purification; Keratinase; Serine protease; Hair waste; Purpureocillium lilacinum
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Purification and characterization of a keratinolytic serine protease from Purpureocillium lilacinum LPS # 876
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Publisher
Database: Elsevier - ScienceDirect
Journal: Process Biochemistry - Volume 48, Issues 5–6, May–June 2013, Pages 972–978
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
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Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us