Organofluorine compounds play an important role in medicinal chemistry, where they are responsible for up to 15% of the pharmaceutical products oil the market, While natural products are Valuable sources of new chemical entities, natural fluorinated Molecules are extremely rare and the pharmaceutical industry has not benefited from a microbial source of this class of compounds. Streptomyces cattleya is all unusual bacterium in that it elaborates fluoroacetate and the amino acid 4-fluorothreonine. The discovery in 2002 of the fluorination enzyme FIA responsible for C-F bond formation in S. cattleya. and its subsequent characterization, opened Lit) for the first time the prospect Of genetically engineering fluorometabolite production front fluoride ion in host organisms. As a proof of principle, we report here the induced production of fluorosalinosporamide by replacing the chlorinase gene salL from Solinispora tropica with the fluorinase gene flA.