| Literature DB >> 9145529 |
M Kurimoto1, T Nishimoto, T Nakada, H Chaen, S Fukuda, Y Tsujisaka.
Abstract
Glycosyl-trehaloses with an isomaltosyl residue were synthesized by alpha-glucosidase from Aspergillus niger by using maltotetraose as a glucosyl donor and trehalose as the acceptor. The one trisaccharide and two tetrasaccharides formed were isolated by successive column chromatography. The results of an enzymatic digestion, methylation analysis, and 13C-NMR studies indicated that these oligosaccharides were alpha-isomaltosyl alpha-glucoside, alpha-isomaltotriosyl alpha-glucoside and alpha-isomaltoside. These oligosaccharides were not fermented to an acid by Streptococcus mutans, and they effectively inhibited water-insoluble glucan synthesis from sucrose by glucosyltransferase. In an in vitro utilization test with human intestinal bacteria, these oligosaccharides were predominantly utilized by Bifidobacteria.Entities:
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Year: 1997 PMID: 9145529 DOI: 10.1271/bbb.61.699
Source DB: PubMed Journal: Biosci Biotechnol Biochem ISSN: 0916-8451 Impact factor: 2.043