Fermentation method for producing polyether antibiotics

Chemistry: molecular biology and microbiology – Micro-organism – tissue cell culture or enzyme using process... – Preparing heterocyclic carbon compound having only o – n – s,...

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435119, 435886, 435244, 549414, C12P 1716, C12P 1748, C12N 138, C07D40700

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050494953

ABSTRACT:
High titers of polyether antibiotics are obtained in a fermentation broth by inoculating a nutrient fermentation broth with a microorganism capable of producing a polyether antibiotic. Growth of the microorganism is established in the broth by incubating the inoculated broth at a physiologically acceptable temperature until pH of the broth begins to rise upon establishment of growth of the microorganism. A free fatty acid then is fed into the broth to achieve and maintain a free fatty acid concentration in the broth of about 0.1% by weight or greater but less than a level at which the free fatty acid is toxic to the microorganism. The free fatty acid is fed into the broth during the remainder of fermentation at about a rate at which the free fatty acid is consumed by the microorganism, to product high titers of the polyether antibiotic.

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