Regioselective synthesis of mannobiose and mannotriose by reverse hydrolysis using a novel 1,6-alpha-D-mannosidase from Aspergillus phoenicis
Athanasopoulos, V.I., Niranjan, K. Full text not archived in this repository. It is advisable to refer to the publisher's version if you intend to cite from this work. See Guidance on citing. To link to this item DOI: 10.1016/j.molcatb.2003.12.001 Abstract/SummaryA novel 1,6-alpha-D-mannosidase was produced by Aspergillus phoenicis grown on a commercial manno-oligosaccharide preparation in liquid culture. The enzyme hydrolysed only alpha-D-Manp-(1 --> 6)-D-Manp and did not act on alpha-D-Manp-(1 --> 2)-D-Manp, or alpha-D-Manp-(1 --> 3)-D-Manp. The 1,6-alpha-D-mannosidase was used for synthesis of manno-oligosaccharides by reverse hydrolysis reaction. The highest yields, expressed as percentages (w/w) of total sugar, were similar to21% mannobiose and similar to5% mannotriose, and they were obtained with 45% (w/w) initial mannose concentration at pH 4.5 after 12 days incubation at 55 degreesC. The disaccharide and trisaccharide products were separated and their structures determined by methylation analysis. Only 1-6 linkages were found in both of them. (C) 2003 Elsevier B.V. All rights reserved.
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