Abstract
ATP alone had no effect on incorporation of fatty acids synthesized de novo and membrane-bound diacylglycerol into triacylglycerol. Combined addition of ATP and Mg2+ totally inhibits incorporation of fatty acids synthesized de novo and stimulated incorporation of membrane-bound diacylglycerol. ATP, Mg2+ and glycerol 3-phosphate stimulate incorporation of fatty acids synthesized de novo into triacylglycerol, but inhibited the incorporation of membrane-bound diacylglycerol. Diacylglycerol generated in situ was shown to be superior to diacylglycerols preloaded on the membrane as substrate for the diacylglycerol acyltransferase. A model is proposed to explain the effect of absorbed exogenous fatty acid on fatty acid synthesis de novo in goat mammary gland.
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- Grunnet I., Knudsen J. Direct transfer of fatty acids synthesized "de novo" from fatty acid synthetase into triacylglycerols without activation. Biochem Biophys Res Commun. 1981 May 29;100(2):629–636. doi: 10.1016/s0006-291x(81)80222-7. [DOI] [PubMed] [Google Scholar]
- Hansen H. O., Grunnet I., Knudsen J. Triacylglycerol synthesis in goat mammary gland. The effect of ATP, Mg2+ and glycerol 3-phosphate on the esterification of fatty acids synthesized de novo. Biochem J. 1984 Jun 1;220(2):513–519. doi: 10.1042/bj2200513. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Hansen J. K., Knudsen J. Transacylation as a chain-termination mechanism in fatty acid synthesis by mammalian fatty acid synthetase. Synthesis of butyrate and hexanoate by lactating cow mammary gland fatty acid synthetase. Biochem J. 1980 Jan 15;186(1):287–294. doi: 10.1042/bj1860287. [DOI] [PMC free article] [PubMed] [Google Scholar]
- INSULL W., Jr, HIRSCH J., JAMES T., AHRENS E. H., Jr The fatty acids of human milk. II. Alterations produced by manipulation of caloric balance and exchange of dietary fats. J Clin Invest. 1959 Feb;38(2):443–450. doi: 10.1172/JCI103819. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Kinsella J. E., Gross M. Palmitic acid and initiation of mammary glyceride synthesis via phosphatidic acid. Biochim Biophys Acta. 1973 Jul 19;316(1):109–113. doi: 10.1016/0005-2760(73)90172-0. [DOI] [PubMed] [Google Scholar]
- Knudsen J., Grunnet I. Transacylation as a chain-termination mechanism in fatty acid synthesis by mammalian fatty acid synthetase. Synthesis of medium-chain-length (C8-C12) acyl-CoA esters by goat mammary-gland fatty acid synthetase. Biochem J. 1982 Jan 15;202(1):139–143. doi: 10.1042/bj2020139. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Marshall M. O., Knudsen J. Biosynthesis of triacylglycerols containing short-chain fatty acids in lactating cow mammary gland. Activity of diacylglycerol acyltransferase towards short-chain acyl-CoA esters. Eur J Biochem. 1977 Dec 1;81(2):259–266. doi: 10.1111/j.1432-1033.1977.tb11947.x. [DOI] [PubMed] [Google Scholar]
- Marshall M. O., Knudsen J. Factors influencing the in vitro activity of diacylglycerol acyltransferase from bovine mammary gland and liver towards butyryl-CoA and palmitoyl-CoA. Biochim Biophys Acta. 1980 Mar 21;617(3):393–397. doi: 10.1016/0005-2760(80)90005-3. [DOI] [PubMed] [Google Scholar]
- Mayorek N., Bar-Tana J. Medium chain fatty acids as specific substrates for diglyceride acyltransferase in cultured hepatocytes. J Biol Chem. 1983 Jun 10;258(11):6789–6792. [PubMed] [Google Scholar]
- Polokoff M. A., Bell R. M. Solubilization, partial purification and characterization of rat liver microsomal diacylglycerol acyltransferase. Biochim Biophys Acta. 1980 Apr 18;618(1):129–142. doi: 10.1016/0005-2760(80)90060-0. [DOI] [PubMed] [Google Scholar]
- Rao G. A., Abraham S. Asymmetric distribution of decanoate in triacylglycerol synthesized in vitro by mammary glands of lactating mice. Lipids. 1983 Apr;18(4):335–338. doi: 10.1007/BF02534711. [DOI] [PubMed] [Google Scholar]
- Sánchez M., Nicholls D. G., Brindley D. N. [The relationship between palmitoyl-coenzyme A synthetase activity and esterification of sn-glycerol 3-phosphate in rat liver mitochondria]. Biochem J. 1973 Apr;132(4):697–706. doi: 10.1042/bj1320697. [DOI] [PMC free article] [PubMed] [Google Scholar]