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| Predicate | Object |
|---|---|
| rdf:type | |
| lifeskim:mentions | |
| pubmed:dateCreated |
1979-12-27
|
| pubmed:abstractText |
Water-insoluble, non-adherent alpha-D-glucans have been obtained from Streptococcus salivarius HHT under two sets of conditions: from a growing culture, or synthesized enzymically by using a glucosyltransferase. In the former case, the glucan ([alpha]D + 197 degrees) was shown by methylation analysis to have a slightly branched structure containing a relatively high proportion (80%) of (1 leads to 3)-alpha-D-glucosidic linkages, together with small proportions of (1 leads to 6)- and (1 leads to 4)-alpha-D-glucosidic linkages. The enzymically synthesized glucan had a much less-branched structure, containing 88% of (1 leads to 3)-alpha-D-glucosidic linkages. Both glucans, on Smith degradation (sequential periodate oxidation, borohydride reduction, and mild acid hydrolysis), gave linear, (1 leads to 3)-alpha-D-glucosidic polysaccharides (yields, 82--90%) that constitute the backbone chains. The presence of small proportions of glycerol, erythritol, 1-O-alpha-D-glucosyl-D-glycerol, and also 2-O-alpha-D-glucosyl-D-erythritol in the products of Smith degradation suggests that the short side-chains are attached to the backbone chain by (1 leads to 4)-, (1 leads to 6)-, and (1 leads to 3)-alpha-D-glucosidic linkages.
|
| pubmed:language |
eng
|
| pubmed:journal | |
| pubmed:citationSubset |
IM
|
| pubmed:chemical | |
| pubmed:status |
MEDLINE
|
| pubmed:month |
Sep
|
| pubmed:issn |
0008-6215
|
| pubmed:author | |
| pubmed:issnType |
Print
|
| pubmed:volume |
74
|
| pubmed:owner |
NLM
|
| pubmed:authorsComplete |
Y
|
| pubmed:pagination |
217-25
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| pubmed:dateRevised |
2004-11-17
|
| pubmed:meshHeading | |
| pubmed:year |
1979
|
| pubmed:articleTitle |
Structure of the water-insoluble alpha-D-glucan of Streptococcus salivarius HHT.
|
| pubmed:publicationType |
Journal Article
|