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Structural studies of the capsular polysaccharide from Streptococcus pneumoniae types 15B and 15C

✍ Scribed by Per-Erik Jansson; Bengt Lindberg; Ulf Lindquist; Jacqueline Ljungberg

Publisher: Elsevier Science
Year: 1987
Tongue: English
Weight: 387 KB
Volume: 162
Category: Article
ISSN: 0008-6215
DOI: 10.1016/0008-6215(87)80205-7

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✦ Synopsis

The structures of the capsular polysaccharides (S-15B and S-15C) from Streptococcus pneumoniae types 15B and 15C have been investigated by using n.m.r. spectroscopy, methylation analysis, and various specific degradations. It is concluded that the polysaccharides are composed of pentasaccharide repeating-units having the following structure: (Formula: see text). In this structure, R is H (80%) or CH2CH2N+Me3 (20%). S-15B further contains O-acetyl groups, approximately 0.7 per repeating unit, which have not been located. The capsular polysaccharides S-15F and S-15A, which have been studied previously, are also composed of pentasaccharide repeating-units, containing the same sequence of sugars, but in a linear arrangement.

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