[Fatty acids of actinomycete phospholipids]. / Zhirnye kisloty fosfolipidov aktinomitsetov.

The fatty acid composition of phospholipids was studied in different actinomycetes growing in two media in order to detect their biological activity. The total phospholipids of the actinomycetes did not differ qualitatively and their composition was represented by the same series of fatty acids (C13--C19). The qualitative composition and the quantitative content of fatty acids in phospholipids depended on the composition of the growth medium. When the actinomycetes were cultivated in a complex medium, the proportion between fatty acids (C14:0, C14:1, C16:0, C17:0, C17:1, C18:1, C18:2) changed. The qualitative composition of fatty acids in phospholipids varied among the cultures. However, the content of palmitoleic, palmitic and oleic acids was elevated in all of the cultures. Under the given experimental conditions, the actinomycetes were found to synthesize phospholipids containing fatty acids with a high degree of unsaturation (mainly at the account of C16:1 and C18:1 acids).

[Influence of the nutrient medium on the total lipid fatty acid composition of Actinomyces canosus]. / Vliianie pitatel'noi sredy na zhirnokislotnyi sostav obshchikh lipidov u Actinomyces canosus.

GLC was used to study the composition of endocellular fatty acids of Actinomyces canosus 89 grown on a chemically defined medium and on a complex medium to which various components were added. Total lipids of the culture contain saturated and unsaturated fatty acids, from C13 to C18, with one or two double bonds. Addition of components to the medium stimulated the biosynthesis of myristic, stearic, oleic, and linoleic fatty acids. Changes in the composition of the growth medium modify the ratio between saturated and unsaturated fatty acids of total lipids, increasing the content of unsaturated fatty acids due to a higher rate of synthesis of linoleic and oleic fatty acids. An increase in the content of unsaturated fatty acids is a positive factor because these acids are involved in important physiological functions of both this organism and other living organisms.

[The fatty acid composition of total lipids and triglycerides in several actinomycetes]. / Zhirnokislotnyi sostav obshchikh lipidov i triglitseridov u nekotorykh aktinomitsetov

Saturated and unsaturated fatty acids (C13-C18) have been found in the composition of lipids and triglycerides of actinomycetes by GLC. Qualitative composition of fatty acids was identical on chemically defined and organic media. Synthesis of unsaturated fatty acids by the actinomycetes was intensive (total yield over 50% and even 84.2% in Act. canosus) on the organic medium I which may be recommended for production of lipid fractions with elevated content of unsaturated fatty acids.