Abstract
Using chromatographic technique, xyloglucanase (XG) A (25 kDa, pI 3.5, 12th glycosyl hydrolase family) was isolated from the enzyme complex secreted by the mycelial fungus Penicillium canescens, and xyloglucanases XG 25 (25 kDa, pI 4.1, 12th glycosyl hydrolase family) and XG 70 (70 kDa, pI 3.5, 74th glycosyl hydrolase family) were isolated from the enzyme complex of Penicillium verruculosum. Properties of the isolated enzymes (substrate specificity, optimal ranges of pH and temperature for enzyme activity and stability, effect of metal ions on catalytic activity) were compared with the properties of xyloglucanases XG 32 of Aspergillus japonicus, XG 78 of Chrysosporium lucknowense, and XG of Trichoderma reesei. The gene xegA encoding XG A of P. canescens was isolated, and the amino acid sequence of the corresponding protein was determined.
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