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A Second Outer-Core Region in Kiebsiella pneumoniae Lipopolysaccharide.
- Source :
-
Journal of Bacteriology . Jun2005, Vol. 187 Issue 12, p4198-4206. 9p. 3 Charts, 4 Graphs. - Publication Year :
- 2005
-
Abstract
- Up to now only one major type of core oligosaccharide has been found in the lipopolysaccharide of all Klebsiella pneumoniae strains analyzed. Applying a different screening approach, we identified a novel Klebsiella pneumoniae core (type 2). Both Klebsiella core types share the same inner core and the outer-core-proximal disaccharide, GlcN-(1,4)-GalA, but they differ in the GlcN substituents. In core type 2, the GlcpN residue is substituted at the O-4 position by the disaccharide β-Glcp(1–6)-α-Glcp(1, while in core type 1 the GlcpN residue is substituted at the O-6 position by either the disaccharide α-Hep(1–4)-α-Kdo(2 or a Kdo residue (Kdo is 3-deoxy-o-manno-octulosonic acid). This difference correlates with the presence of a three-gene region in the corresponding core biosynthetic clusters. Engineering of both core types by interchanging this specific region allowed studying the effect on virulence. The replacement of Klebsiella core type 1 in a highly type 2 virulent strain (52145) induces lower virulence than core type 2 in a murine infection model. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00219193
- Volume :
- 187
- Issue :
- 12
- Database :
- Academic Search Index
- Journal :
- Journal of Bacteriology
- Publication Type :
- Academic Journal
- Accession number :
- 17485899
- Full Text :
- https://doi.org/10.1128/JB.187.12.4198-4206.2005