Related Experiment Video
Updated: Aug 3, 2026
09:07
Single-Step Enrichment of a TAP-Tagged Histone Deacetylase of the Filamentous Fungus Aspergillus nidulans for Enzymatic Activity Assay
Published on: May 1, 2019
Glutamate decarboxylase activity in Trichoderma viride conidia and developing mycelia
J Strigácová1, P Chovanec, T Liptaj
1Department of Biochemistry and Microbiology, Slovak University of Technology, Bratislava.
Archives of Microbiology
|March 29, 2001
Summary
Glutamic acid decarboxylase (GAD) activity in Trichoderma viride is linked to fungal development and energy metabolism. This membrane-bound enzyme
Area of Science:
- Biochemistry
- Mycology
- Enzymology
Background:
- Glutamic acid decarboxylase (GAD) is crucial for gamma-aminobutyric acid (GABA) synthesis.
- Understanding GAD's role in fungal development is essential for controlling growth and differentiation.
Purpose of the Study:
- To investigate the characteristics and regulation of GAD activity in Trichoderma viride.
- To explore the relationship between GAD activity and the developmental stages of T. viride.
Main Methods:
- Enzyme assays were performed on conidia, submerged, and aerial mycelia.
- GAD activity was measured under varying pH, temperature, and chemical treatments.
- Organellar fractions were analyzed for GAD localization.
- Developmental changes in GAD activity were monitored during conidiation and in response to light.
Main Results:
- GAD activity in T. viride exhibits optimal activity at 30°C and pH 4.
- The enzyme is membrane-bound, with highest activity in the mitochondrial/vacuolar fraction.
- GAD activity fluctuates during conidial germination and cultivation, showing quasi-oscillatory changes.
- Light significantly induces GAD activity, preceding conidia formation.
Conclusions:
- GAD activity in T. viride is closely associated with developmental status and differentiation.
- The enzyme may link developmental events to energy metabolism.
- GAD's regulation by light suggests a role in photomorphogenesis.
