D组、E组和H组链球菌以及变形链球菌的肽聚糖组成与分类学
Peptidoglycan composition and taxonomy of group D, E, and H streptococci, and Streptococcus mutans.
作者信息
Slade H D, Slamp W C
出版信息
J Bacteriol. 1972 Feb;109(2):691-5. doi: 10.1128/jb.109.2.691-695.1972.
The qualitative and quantitative composition of the peptidoglycan from the cell wall of groups D, E, and H streptococci, and Streptococcus mutans, was determined. In group D, S. faecalis and the closely related species S. liquefaciens and S. zymogenes were separated from S. faecium and the closely related species S. durans on the basis of their peptidoglycan composition. A relationship among S. bovis, S. equinus, and some strains of S. mutans was indicated by the presence in each of a similar peptidoglycan containing threonine. Threonine was released from the S. mutans polymer as a threonine-lysine dipeptide. Hydrolysis of the dipeptide at 100 C for 24 hr in 6 n HC1 was required to break the peptide bond. Motile group D streptococci possessed a peptidoglycan of the same composition as S. faecium. Group E and H strains were also similar in the composition of their peptidoglycan. The results demonstrate that peptidoglycan composition can be used to (i) aid in the division of members of an immunological group into subgroups, and (ii) indicate a relationship between members of the same genus which are not related on an immunological basis.
测定了D、E和H组链球菌以及变形链球菌细胞壁中肽聚糖的定性和定量组成。在D组中，粪肠球菌以及密切相关的液化链球菌和发酵链球菌，根据其肽聚糖组成与屎肠球菌以及密切相关的耐久链球菌区分开来。牛链球菌、马肠链球菌和一些变形链球菌菌株之间存在一种关系，其表现为各自都含有一种含苏氨酸的相似肽聚糖。苏氨酸以苏氨酸-赖氨酸二肽的形式从变形链球菌聚合物中释放出来。需要在6N盐酸中于100℃水解该二肽24小时才能断裂肽键。运动性D组链球菌拥有与屎肠球菌相同组成的肽聚糖。E组和H组菌株在肽聚糖组成上也相似。结果表明，肽聚糖组成可用于：（i）辅助将一个免疫学组的成员划分为亚组；（ii）表明同一属中在免疫学基础上无关联的成员之间的关系。
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