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Trisaccharide synthesis by glycosyl transfer from p-nitrophenyl beta-D-N-acetylgalactosaminide on to disaccharide acceptors catalysed by the beta-N-acetylhexosaminidase from Aspergillus oryzae
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UNSPECIFIED (1997) Trisaccharide synthesis by glycosyl transfer from p-nitrophenyl beta-D-N-acetylgalactosaminide on to disaccharide acceptors catalysed by the beta-N-acetylhexosaminidase from Aspergillus oryzae. CARBOHYDRATE RESEARCH, 305 (3-4). pp. 363-370. ISSN 0008-6215.
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Abstract
The beta-N-acetylhexosaminidase from Aspergillus oryzae catalysed the transfer of beta-D-N-acetylgalactosaminyl residues from p-nitrophenyl beta-D-N-acetylglucosaminide on to disaccharide accepters consisting of thioethyl glycosides of alpha-D-Glc-(1 --> 4)-beta-D-Glc, beta-D-Glc-(1 --> 4)-beta-D-Glc and beta-D-Glc-(1 --> 6)-beta-D-Glc. The principle of 'anomeric control' was exemplified by the results which showed that an alpha-linkage between the units of the acceptor favoured exclusively the formation of a new (1 --> 4)-linkage, whereas the beta-configuration in the acceptor led to a mixture of (1 --> 4)- and (1 --> 3)-linked products, as observed for simple glycosides of monosaccharide accepters. With the thioethyl beta-lactoside as acceptor, beta-D-Gal(1 --> 6)-beta-D-Gal-(1 --> 4)-beta-D-GlcSEt was formed, owing to the action of residual beta-D-galactosidase activity in the N-acetylhexosaminidase on the thioethyl beta-lactoside acting as both donor and acceptor. (C) 1998 Elsevier Science Ltd.
Item Type: | Journal Article | ||||
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Subjects: | Q Science > QD Chemistry | ||||
Journal or Publication Title: | CARBOHYDRATE RESEARCH | ||||
Publisher: | ELSEVIER SCI LTD | ||||
ISSN: | 0008-6215 | ||||
Official Date: | December 1997 | ||||
Dates: |
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Volume: | 305 | ||||
Number: | 3-4 | ||||
Number of Pages: | 8 | ||||
Page Range: | pp. 363-370 | ||||
Publication Status: | Published |
Data sourced from Thomson Reuters' Web of Knowledge
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