NDLI: Production of extracellular alkaline proteases by Aspergillus clavatus

Content Provider	Springer Nature Link
Author	Tremacoldi, Célia R. Carmona, Eleora Ca
Copyright Year	2005
Abstract	The production of extracellular alkaline proteases from Aspergillus clavatus was evaluated in a culture filtrate medium, with different carbon and nitrogen sources. The fungus was cultivated at three different temperatures during 10 days. The proteolytic activity was determined on casein pH 9.5 at 37 °C. The highest alkaline proteolytic activity (38 U/ml) was verified for culture medium containing glucose and casein at 1% (w/v) as substrates, obtained from cultures developed at 25 °C for 6 days. Cultures developed in Vogel medium with glucose at 2% (w/v) and 0.2% (w/v) NH$_{4}$NO$_{3}$ showed higher proteolytic activity (27 U/ml) when compared to the cultures with 1% of the same sugar. Optimum temperature was 40 °C and the half-lives at 40, 45 and 50 °C were 90, 25 and 18 min, respectively. Optimum pH of enzymatic activity was 9.5 and the enzyme was stable from pH 6.0 to 12.0.
Starting Page	169
Ending Page	172
Page Count	4
File Format	PDF
ISSN	09593993
Journal	World Journal of Microbiology and Biotechnology
Volume Number	21
Issue Number	2
e-ISSN	15730972
Language	English
Publisher	Kluwer Academic Publishers
Publisher Date	2005-01-01
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Alkaline proteases Aspergillus clavatus optimization protease characterization protease production Chemistry/Food Science Biochemistry Microbiology Animal Anatomy Morphology Histology Environmental Biotechnology
Content Type	Text
Resource Type	Article
Subject	Physiology Medicine Applied Microbiology and Biotechnology Biotechnology

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