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. 1996 Jun;178(11):3350–3352. doi: 10.1128/jb.178.11.3350-3352.1996

Pseudomonas aeruginosa PAO1 ceases to express serotype-specific lipopolysaccharide at 45 degrees C.

S A Makin 1, T J Beveridge 1
PMCID: PMC178092  PMID: 8655520

Abstract

Most Pseudomonas aeruginosa strains are able to produce two distinct lipopolysaccharide (LPS) O-polysaccharide types, A-band (common-antigen) and B-band (serotype-specific) LPSs. The relative expression levels of these two LPS types in P. aeruginosa PAO1 (O5 serotype) at various growth temperatures were investigated by sodium dodecyl sulfate-polyacrylamide gel electrophoresis and silver staining or Western blotting (immunoblotting) with monoclonal antibodies specific for each O polysaccharide. A-band and B-band LPSs were expressed concurrently when the cells grew at 15, 25, and 35 degrees C; however, growth at 45 degrees C resulted in a surface deficiency in B-band LPS as determined by immunoblotting and agglutination with B-band-specific monoclonal antibody. Transfer of these cells (expressing A-band LPS but deficient in B-band LPS) [A+B-]) to a lower temperature (at which the division time was comparable) resulted in a rapid resumption of normal A-band and B-band expression. B-band LPS was detectable by immunoblotting before measurable growth of the culture had occurred.

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Selected References

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