Production and preliminary characterization of RNA-depolymerase from Trichoderma harzianum

Area of Science:

• Biochemistry
• Enzymology
• Mycology

Background:

• Trichoderma harzianum is a fungus known for producing various enzymes.
• RNA-depolymerases play crucial roles in RNA metabolism and have biotechnological applications.

Purpose of the Study:

• To characterize the RNA-depolymerase produced by Trichoderma harzianum.
• To determine the optimal conditions for enzyme activity and stability.

Main Methods:

• Cultivation of Trichoderma harzianum under specific growth conditions.
• Assay of RNA-depolymerase activity at different time points, pH, and temperatures.
• Evaluation of enzyme stability and the effect of inhibitors.

Main Results:

• Maximum RNA-depolymerase activity was observed between 72 to 120 hours of fungal growth.
• Potassium phosphate (K2HPO4) addition repressed enzyme production.
• Optimal enzyme activity occurred at pH 7.8 and temperatures ranging from 40 to 50°C.
• The enzyme exhibited stability over a pH range of 3.2 to 9.0.
• Significant activity (80%) was retained after 60 minutes at 40°C.
• EDTA and p-chloromercuribenzoate did not affect enzyme activity.

Conclusions:

• Trichoderma harzianum is a viable source of RNA-depolymerase.
• The enzyme's characteristics suggest potential for biotechnological applications requiring specific pH and temperature ranges.
• Understanding factors affecting enzyme production, like K2HPO4, is important for optimizing yields.