Biosynthesis of Monensin

Abstract
The biosynthesis of monensin by Streptomyces cinnamonensis was studied by using 14 C-labeled glucose, acetate, propionate, butyrate, and methionine. The results indicated that the antibiotic is synthesized from five acetate, seven propionate, and one butyrate molecules. The o -methyl group of monensin is derived from methionine, whereas the terminal hydroxymethyl group is incorporated from acetate.