血链球菌1 MC 204产生的支链葡聚糖和一种由淀粉产生的可溶性葡聚糖的结构研究。

Structural studies of amyloglucan and a soluble glucan produced from starch by Streptococcus sanguis 1 MC 204.

作者信息

Coogan M M, Jones R L, Manchester K L, Viljoen H W

机构信息

Department of Oral Pathology, University of the Witwatersrand, Johannesburg, South Africa.

出版信息

Carbohydr Res. 1991 Sep 30;218:201-9. doi: 10.1016/0008-6215(91)84098-y.

DOI:10.1016/0008-6215(91)84098-y

PMID:1802385

Abstract

Two alpha-D-glucans, produced from amylopectin by an oral isolate Streptococcus sanguis 1 MC 204, were shown to contain both (1----4) and (1----6) linkages. The first alpha-D-glucan (amyloglucan) was adherent and highly insoluble, and methylation analysis, i.r. spectroscopy, and enzymic analyses showed it to be similar to amylopectin but less branched with longer interior and exterior chains. The second polymer was a non-adherent soluble alpha-D-glucan that was similar to amyloglucan but with long exterior chains. These alpha-D-glucans were not synthesised de novo, but were the products of the modification of amylopectin.

摘要

由口腔分离株血链球菌1 MC 204从支链淀粉产生的两种α-D-葡聚糖被证明同时含有（1→4）和（1→6）键。第一种α-D-葡聚糖（支链葡聚糖）具有黏附性且高度不溶，甲基化分析、红外光谱分析和酶分析表明它与支链淀粉相似，但分支较少，内部和外部链更长。第二种聚合物是一种不具黏附性的可溶性α-D-葡聚糖，它与支链葡聚糖相似，但具有长的外部链。这些α-D-葡聚糖不是从头合成的，而是支链淀粉修饰的产物。