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1990•Journal of BacteriologyOpen access

Efficient incorporation of galactose into lipopolysaccharide by Escherichia coli K-12 strains with polar galE mutations

Carl A. Schnaitman, Elizabeth A. Austin

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Abstract

Efficient incorporation of exogenous galactose into lipopolysaccharide was observed in a strain with a galE::Tn10 insertion and a strain with a deletion of galOPE. No incorporation was observed in a strain with a longer (galETK) deletion, indicating that incorporation into the galE mutants was due to a low level of expression of galTK from internal or fortuitous promoters. These galE mutants provided a convenient and specific way to radiolabel lipopolysaccharide.

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What this paper is about

Efficient incorporation of exogenous galactose into lipopolysaccharide was observed in a strain with a galE::Tn10 insertion and a strain with a deletion of galOPE. No incorporation was observed in a strain with a longer (galETK) deletion, indicating that incorporation into the galE mutants was due to a low level of expression of galTK from internal or fortuitous promoters. These galE mutants provided a convenient and specific way to radiolabel lipopolysaccharide.

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Available abstract

Efficient incorporation of exogenous galactose into lipopolysaccharide was observed in a strain with a galE::Tn10 insertion and a strain with a deletion of galOPE. No incorporation was observed in a strain with a longer (galETK) deletion, indicating that incorporation into the galE mutants was due to a low level of expression of galTK from internal or fortuitous promoters. These galE mutants provided a convenient and specific way to radiolabel lipopolysaccharide.

Key concepts: Escherichia coli, Biology, Lipopolysaccharide, Mutant, Galactose, Strain (injury), Mutation, Transposable element

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