Enhancement of L-Asparaginase Production by Isolated <Emphasis Type="Italic">Bacillus circulans</Emphasis> (MTCC 8574) Using Response Surface Methodology |
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Authors: | M Hymavathi T Sathish Ch Subba Rao R S Prakasham |
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Institution: | (1) Bioengineering and Environmental Center, Indian Institute of Chemical Technology, Hyderabad, 500 607, India; |
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Abstract: | L-asparaginase production was optimized using isolated Bacillus circulans (MTCC 8574) under solid-state fermentation (SSF) using locally available agricultural waste materials. Among different agricultural
materials (red gram husk, bengal gram husk, coconut, and groundnut cake), red gram husk gave the maximum enzyme production.
A wide range of SSF parameters were optimized for maximize the production of L-asparaginase. Preliminary studies revealed
that incubation temperature, moisture content, inoculum level, glucose, and L-asparagine play a vital role in enzyme yield.
The interactive behavior of each of these parameters along with their significance on enzyme yield was analyzed using fractional
factorial central composite design (FFCCD). The observed correlation coefficient (R
2) was 0.9714. Only L-asparagine and incubation temperature, were significant in linear and quadratic terms. L-asparaginase
yield improved from 780 to 2,322 U/gds which is more than 300% using FFCCD as a means of optimizing conditions. |
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