Abstract
Polysomes were isolated from livers of rats fed various diets and were translated in a protein-synthesizing system derived from cultured Chang liver cells. One of the labeled products was identified as complete subunit(s) of fatty acid synthetase by indirect immunoprecipitation and sodium dodecyl sulfate-polyacrylamide gel electrophoresis of the solubilized immunoprecipitate. The relative amounts of fatty acid synthetase synthesized by polysomes from livers of rats fed a normal diet, starved rats, and rats starved and refed a fat-free diet for 16 hr were 1, 0.1, and 10, respectively. Induction of synthesis of fatty acid synthetase after fat-free refeeding of starved rats began by 2 hr (3-fold increase over starved animals), was increasing rapidly by 5 hr (19-fold over starved animals), and reached a high level by 16 hr (95-fold over starved and 10-fold over normally fed).
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- Alberts A. W., Ferguson K., Hennessy S., Vagelos P. R. Regulation of lipid synthesis in cultured animal cells. J Biol Chem. 1974 Aug 25;249(16):5241–5249. [PubMed] [Google Scholar]
- Aviv H., Boime I., Leder P. Protein synthesis directed by encephalomyocarditis virus RNA: properties of a transfer RNA-dependent system. Proc Natl Acad Sci U S A. 1971 Sep;68(9):2303–2307. doi: 10.1073/pnas.68.9.2303. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Burton D. N., Collins J. M., Kennan A. L., Porter J. W. The effects of nutritional and hormonal factors on the fatty acid synthetase level of rat liver. J Biol Chem. 1969 Aug 25;244(16):4510–4516. [PubMed] [Google Scholar]
- Laemmli U. K. Cleavage of structural proteins during the assembly of the head of bacteriophage T4. Nature. 1970 Aug 15;227(5259):680–685. doi: 10.1038/227680a0. [DOI] [PubMed] [Google Scholar]
- Numa S., Yamashita S. Regulation of lipogenesis in animal tissues. Curr Top Cell Regul. 1974;8(0):197–246. doi: 10.1016/b978-0-12-152808-9.50012-2. [DOI] [PubMed] [Google Scholar]
- Schutz G., Beato M., Feigelson P. Messenger RNA for hepatic tryptophan oxygenase: its partial purification, its translation in a heterologous cell-free system, and its control by glucocorticoid hormones. Proc Natl Acad Sci U S A. 1973 Apr;70(4):1218–1221. doi: 10.1073/pnas.70.4.1218. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Taylor J. M., Schimke R. T. Synthesis of rat liver albumin in a rabbit reticulocyte cell-free protein-synthesizing system. J Biol Chem. 1973 Nov 25;248(22):7661–7668. [PubMed] [Google Scholar]
- Volpe J. J., Lyles T. O., Roncari D. A., Vagelos P. R. Fatty acid synthetase of developing brain and liver. Content, synthesis, and degradation during development. J Biol Chem. 1973 Apr 10;248(7):2502–2513. [PubMed] [Google Scholar]
- Volpe J. J., Vagelos P. R. Saturated fatty acid biosynthesis and its regulation. Annu Rev Biochem. 1973;42:21–60. doi: 10.1146/annurev.bi.42.070173.000321. [DOI] [PubMed] [Google Scholar]
- Yu H. L., Burton D. N. Adaptive synthesis of rat liver fatty acid synthetase: evidence for in vitro formation of active enzyme from inactive protein precursors and 4'-phosphopantetheine. Biochem Biophys Res Commun. 1974 Nov 27;61(2):483–488. doi: 10.1016/0006-291x(74)90982-6. [DOI] [PubMed] [Google Scholar]