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Updated: May 4, 2026

Single-Step Enrichment of a TAP-Tagged Histone Deacetylase of the Filamentous Fungus Aspergillus nidulans for Enzymatic Activity Assay
Published on: May 1, 2019
Tannin acyl hydrolase (EC 3.1.1.20) activity of Aspergillus, Penicillium, Fusarium and Trichoderma
Abstract:
A spectrophotometric method to determine gallic acid, residual gallotannin and tannin acyl hydrolase (EC 3.1.1.20) activity during microbial hydrolysis of pentagalloyl glucose is described. The following equations have been developed to estimate gallotannin and gallic acid in the incubation medium by absorbance measurements at two different wavelengths: concentration of gallotannin (μg ml(-1))=34.41 (A293.8)-6.98 (A254.6); concentration of gallic acid (μg ml(-1))=21.77 (A254.6)-17.17 (A293.8). As compared to Aspergillus and Penicillium, the fungal genera extensively studied for the production of this enzyme, Fusarium solanii and Trichoderma viride exhibited higher enzyme activity showing approximately 88 and 84 mole percent conversion respectively after a 24 h incubation period.
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