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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 

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Type 3-specific synthase of Streptococcus pneumoniae (Cap3B) directs type 3 polysaccharide biosynthesis in Escherichia coli and in pneumococcal strains of different serotypes.

The cap3B gene, which is involved in the formation of the capsule of Streptococcus pneumoniae type 3, encodes a 49-kD protein that has been identified as a polysaccharide synthase. Escherichia coli cells harboring the recombinant plasmid pTBP3 (cap3B) produced pneumococcal type 3 polysaccharide, as demonstrated by immunological tests. Biochemical and cell fractionation analyses revealed that this polysaccharide had a high molecular mass and was localized in substantial amounts in the periplasmic space of E. coli. Unencapsulated (S-2), laboratory pneumococcal strains synthesized type 3 polysaccharide by transformation with plasmid pLSE3B harboring cap3B. In addition, encapsulated pneumococci of types 1, 2, 5, or 8 transformed with pLSE3B can direct the synthesis of pneumococcal type 3 polysaccharide, leading to the formation of strains that display binary type of capsule.[1]

References

  1. Type 3-specific synthase of Streptococcus pneumoniae (Cap3B) directs type 3 polysaccharide biosynthesis in Escherichia coli and in pneumococcal strains of different serotypes. Arrecubieta, C., López, R., García, E. J. Exp. Med. (1996) [Pubmed]
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