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Analysis of linkage positions in saccharomyces cerevisiae d-mannans by the reductive-cleavage method

✍ Scribed by James U. Bowie; Paul V. Trescony; Gary R. Gray

Publisher: Elsevier Science
Year: 1984
Tongue: English
Weight: 531 KB
Volume: 125
Category: Article
ISSN: 0008-6215
DOI: 10.1016/0008-6215(84)85165-4

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✦ Synopsis

The positions of linkage in the D-mannans derived from Saccharomyces cerevisiae X2180 and its mutants, mnn1, mnn2, and mnn4, were established by perethylation and subsequent reductive cleavage with triethylsilane in the presence of boron trifluoride etherate (BF3 . Et2O) or trimethylsilyl trifluoromethanesulfonate. With the latter as the catalyst, all glycosidic carbon-oxygen bonds were cleaved, to produce a mixture of ethylated 1,5-anhydro-D-mannitol derivatives. With BF3 . Et2O as the catalyst, 2-, 3-, and 6-linked residues were incompletely cleaved, and residues linked at both O-2 and O-6 were not cleaved at all. It was concluded that reductive cleavage is an attractive method for determination of the structure of polysaccharides.

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