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. 2002 Feb 5;337(2):133-7.
doi: 10.1016/s0008-6215(01)00298-1.

Utilization of commercial non-chitinase enzymes from fungi for preparation of 2-acetamido-2-deoxy-D-glucose from beta-chitin

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Utilization of commercial non-chitinase enzymes from fungi for preparation of 2-acetamido-2-deoxy-D-glucose from beta-chitin

Mongkol Sukwattanasinitt et al. Carbohydr Res. .

Abstract

Commercial non-chitinase enzymes from Aspergilus niger, Acremonium cellulolyticus and Trichoderma viride were investigated for potential utilization in the preparation of 2-acetamido-2-deoxy-D-glucose (N-acetyl-D-glucosamine, GlcNAc) from chitin. Among the tested enzymes, cellulase A. cellulolyticus exhibited highest chitinolytic activity per weight toward amorphous chitin and beta-chitin from squid pen. The optimum pH of the enzyme was 3 where it produced two major hydrolytic products, GlcNAc and N,N'-diacetylchitobiose ([GlcNAc](2)). The product ratio, GlcNAc:[GlcNAc](2), increased while the total yield decreased as the pH was raised from 3. All of the [GlcNAc](2) produced at pH 3 can be converted in situ to GlcNAc by mixing cellulase A. cellulolyticus with one of several other enzymes from A. niger resulting in a higher yield of GlcNAc. An appropriate mixing ratio of cellulase A. cellulolyticus to another enzyme was 9:1 (w/w) and an optimum substrate concentration was 20 mg/mL.

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