Journal
APPLIED BIOCHEMISTRY AND MICROBIOLOGY
Volume 39, Issue 5, Pages 475-481Publisher
PLEIADES PUBLISHING INC
DOI: 10.1023/A:1025444602229
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The ability to produce extracellular O-glycosylhydrolases was studied in 14 strains of marine filamentous fungi sampled from the bottom sediments of the South China Sea. The following activities were detected in the culture liquids of the fungi: N-acetyl-beta-D-glucosaminidase,beta-D-glucosidase,beta-D-galactosidase, beta-1,3-glucanase, amylase, and pustulanase. beta-1.3-Glucanases were isolated by ultrafiltration. hydrophobic interaction chromatograph, and ion exchange chromatography, and their properties were studied. Data on products of enzymatic digestion of laminaran, absence of transglycosylation activity, and the pattern of action of natural inhibitors confirmed that beta-1.3-glucanase belonged to the exo type. Inhibitor analysis demonstrated the role of a thiol group and tryptophan and tyrosine residues in the catalytic activity.
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