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J Bacteriol. 1969 November; 100(2): 823-826
Copyright © 1969 American Society for Microbiology. All Rights Reserved.

Lipid Synthesis by Isolated Chlamydia psittaci

¹ Physiological Sciences Department and Department of Microbiology, Naval Medical Research Institute, Bethesda, Maryland 20014

ABSTRACT

The isolated cells of the host-dependent meningopneumonitis agent, Chlamydia psittaci, were shown to incorporate radioactive carbon from aspartate, isoleucine, and glucose-6-phosphate into cell lipids. The nature of this incorporation was investigated. Radioactivity was found only in the fatty acids and primarily in the phosphatidyl ethanolamine, and, to a lesser extent, in the phosphatidyl choline fractions. Branched-chain fatty acids, not found in host lipid, were shown to constitute a large proportion of the fatty acid content of phosphatidyl ethanolamine. The reasons why only fatty acid synthesis took place under the conditions of our experiments with isolated meningopneumonitis agent cells remain obscure.