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Basidiomycetes harbour a hidden treasure of proteolytic diversity

Paper ID Volume ID Publish Year Pages File Format Full-Text
25383 43571 2007 11 PDF Available
Title
Basidiomycetes harbour a hidden treasure of proteolytic diversity
Abstract

This survey is the first to investigate the proteolytic potential of a large number of basidiomycetes. Aqueous extracts of 43 basidiomycetes were investigated for their content of proteolytic activities, using gelatin zymography. The activities were characterised qualitatively using class specific inhibitors. All four catalytic classes of proteases were present, with 4% of all activities classified as aspartic, 5% as cysteine, 6% as metallo and 22% as serine proteases, while the remaining activities could not be assigned unambiguously. The majority of the latter were not inhibited by any of the inhibitors used and were termed insensitive. Different proteolytic activities are evenly distributed among members of all orders of basidiomycetes, although some taxa are a richer source of proteases than others. A significant number of the cysteine protease activities shown here have not previously been reported in basidiomycetes. The fungal cysteine and serine protease inhibitors, clitocypin and CNSPI (Clitocybe nebularis serine protease inhibitor), both inhibited a number of activities and even a few activities that were otherwise insensitive to all other inhibitors used, hence indicating their potential for a regulatory role. The number and diversity of proteases in basidiomycetes are seen to be remarkable and encourage further investigation.

Keywords
Basidiomycete; Proteolytic activity; Gelatin zymography; Protease; Inhibitor; Clitocypin
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Basidiomycetes harbour a hidden treasure of proteolytic diversity
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Biotechnology - Volume 128, Issue 2, 1 February 2007, Pages 297–307
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
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