Isolation and characterization of an unsaturated fatty acid-requiring mutant of cultured mammalian cells.
An unsaturated fatty acid-requiring mutant derived from Chinese hamster ovary (CHO) cells has been isolated and characterized. This mutant grows normally when oleate or other unsaturated fatty acids are supplemented in the growth medium. Unlike the wild-type CHO cells, growth stops when medium is deprived of unsaturated fatty acid. Whole cell pulse experiments with [14C]acetate or [14C]stearate indicate that the mutant is defective in unsaturated fatty acid synthesis. Enzyme assays in vitro show that the enzymatic defect of the mutant is localized to the microsomal stearoyl-CoA desaturase.
D000085:Acetates / Q000378:metabolism; D002455:Cell Division / Q000187:drug effects; D002460:Cell Line; D002462:Cell Membrane / Q000378:metabolism*; D002469:Cell Separation; D044943:Fatty Acid Desaturases / Q000378:metabolism*; D005227:Fatty Acids / Q000096:biosynthesis; D005231:Fatty Acids, Unsaturated / Q000378:metabolism* / Q000494:pharmacology; D006358:Hot Temperature; D008861:Microsomes / Q000201:enzymology; D009154:Mutation; D009251:NADPH-Ferrihemoprotein Reductase / Q000378:metabolism; D009829:Oleic Acids / Q000378:metabolism; D013230:Stearoyl-CoA Desaturase / Q000378:metabolism*
D000085:Acetates; D005227:Fatty Acids; D005231:Fatty Acids, Unsaturated; D009829:Oleic Acids; D044943:Fatty Acid Desaturases; D013230:Stearoyl-CoA Desaturase; D009251:NADPH-Ferrihemoprotein Reductase