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. 1985 Dec;164(3):1211–1217. doi: 10.1128/jb.164.3.1211-1217.1985

Maintenance of D-alanine ester substitution of lipoteichoic acid by reesterification in Staphylococcus aureus.

H U Koch, R Döker, W Fischer
PMCID: PMC219317  PMID: 4066613

Abstract

Toluene-treated Staphylococcus aureus cells did not synthesize teichoic acid and lipoteichoic acid under the conditions used. The organism displayed, however, a high capacity of incorporating D-[14C]alanine into previously formed polymers. The reaction was dependent on ATP and enhanced by magnesium ions. The incorporation rate into lipoteichoic acid correlated with the rate of loss of alanine ester which occurred through transfer to teichoic acid and base-catalyzed hydrolysis. At pH 6.5 the loss (20% within 4 h) was completely compensated for by reesterification. At pH 7.5 the loss was 60%, but by accelerated incorporation it was reduced to 10%. Incorporation was also enhanced when the original substitution of lipoteichoic acid was lowered by previous growth of S. aureus at high salt concentration. The newly added alanine was randomly distributed along the poly(glycerophosphate) chain. The decreased alanine substitution of lipoteichoic acid after growth at high salt concentration was shown to result from a direct inhibition of alanine incorporation.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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