Structure of the capsular polysaccharide from the Klebsiella K8 reference strain 1015
1995
Abstract The structure of the capsular polysaccharide from the Klebsiella K8 reference strain 1015 has been elucidated. The structure was deduced from sugar analysis, different methylation analyses, a uronic acid degradation, and NMR spectroscopy. It is concluded that the polysaccharide is composed of pentasaccharide repeating units with the structure: The structure differs from that of the previously published structure of the capsular polysaccharide from Klebsiella K8, which originates from another strain and has the following structure: The serological similarity between the two strains is most likely derived from a common tetrasaccharide which is substituted in different ways in the two strains. Since the strain in the present investigation originates from the Klebsiella K reference strain collection of the International Escherichia and Klebsiella Centre, Copenhagen, Denmark, it is suggested that it should keep the designation K8. The other polysaccharide with Klebsiella K8 specificity should be renamed as K8,52,59 based on the cross-reactivity of the strain (I. Orskov, unpublished).
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