Mechanism of the apparent regulation of Escherichia coli unsaturated fatty acid synthesis by exogenous oleic acid

M. L. Polacco, J. E. Cronan

Research output: Contribution to journalArticlepeer-review

Abstract

Starvation of strains of E. coli which are glycerol auxotrophs and are also defective in β oxidation results in the accumulation of large amounts of free fatty acid. It is now reported that addition of exogenous oleic acid to these cultures results in no decrease in the synthesis of the unsaturated acids of the free fatty acid fraction although a 40 to 60% decrease of [14C]acetate incorporation into phospholipid unsaturated acyl moieties occurs under these conditions. This result indicates that the decreased synthesis of phospholipid unsaturated acyl moieties observed by others during oleic acid supplementation can be attributed to competition between exogenous and endogenously synthesized unsaturated fatty acids rather than a curtailment of unsaturated fatty acid synthesis per se.

Original languageEnglish (US)
Pages (from-to)5488-5490
Number of pages3
JournalJournal of Biological Chemistry
Volume252
Issue number15
StatePublished - Dec 1 1977
Externally publishedYes

ASJC Scopus subject areas

  • Biochemistry
  • Molecular Biology
  • Cell Biology

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