TY - JOUR T1 - Structure of the water-insoluble alpha-D-glucan of Streptococcus salivarius HHT. AU - Tsumuraya,Y, AU - Misaki,A, PY - 1979/9/1/pubmed PY - 1979/9/1/medline PY - 1979/9/1/entrez SP - 217 EP - 25 JF - Carbohydrate research JO - Carbohydr Res VL - 74 N2 - 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. SN - 0008-6215 UR - https://www.unboundmedicine.com/medline/citation/487362/Structure_of_the_water_insoluble_alpha_D_glucan_of_Streptococcus_salivarius_HHT_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0008-6215(00)84778-3 DB - PRIME DP - Unbound Medicine ER -