A. Tanksale et al., Immobilization of alkaline protease from Conidiobolus macrosporus for reuse and improved thermal stability, BIOTECH LET, 23(1), 2001, pp. 51-54
Alkaline protease from Conidiobolus macrosporus was immobilized on polyamid
e using glutaraldehyde as a bifunctional agent. The immobilized enzyme was
optimally active at a higher temperature of 50 degreesC than the free enzym
e (40 degreesC ) and showed a ten-fold increased thermostability at 60 degr
eesC compared to that of the free enzyme. The efficiency of immobilization
was 58% under the optimal conditions of pH and temperature. There was a 14-
fold decrease in the K-m of immobilized enzyme compared to the free enzyme.
The immobilized enzyme was fully active even after twenty-two cycles of re
peated use. It retained 80% activity at 50 degreesC in presence of 8 M urea
exhibiting its stability to the denaturant and was compatible with several
commercial detergents.