Disproportionation reactions catalyzed by Leuconostoc and Streptococcus glucansucrases

✍ Scribed by Thomas P. Binder; Gregory L. Côté; John F. Robyt

• Book ID: 102993154
• Publisher: Elsevier Science
• Year: 1983
• Tongue: English
• Weight: 847 KB
• Volume: 124
• Category: Article
• ISSN: 0008-6215
• DOI: 10.1016/0008-6215(83)88463-8

✦ Synopsis

Glucansucrases from Leuconostoc mesenteroides NRRL B-512F and Streptococcus mutans 6715 were found to utilize a number of D-gluco-oligosaccharides as D-glucosyl donors and as acceptors . These donors included isomaltotriose and its homologs, panose, maltotriose, and dextran. In each case, D-glucosyl groups were transferred from the donor to an acceptor sugar . When the donor sugar also acted as an acceptor, disproportionation reactions occurred . Isomaltotriose, for example, gave rise to isomaltose and isomaltotetraose initially, and to a series of isomalto-oligosaccharides eventually . In addition to forming a-D-(1-*6) linkages in these reactions, dextransucrase from S. mutans 6715 was capable of forming a-D-(1-*3)-linked products .