Abstract

The identification of the Streptomyces sp. VKM Ac-2618D strain had been carried out and its morphological and physiological features have been studied in relation to the immunosuppressant tacrolimus production. The phenotypic variability of the strain was analyzed and the dissociant with a high level of tacrolimus production was identified. Based on a comprehensive study of morphological, physiological and chemotaxonomic properties, as well as phylogenetic analysis, the strain was named Streptomyces tsukubensis VKM Ac-2618D. The strain genome contains the full version of the tacrolimus biosynthetic gene cluster. The advantages of fed-batch cultivation mode for tacrolimus biosynthesis were shown. The results obtained expand the understanding of the peculiarities of polyketide biosynthesis and can be used in the development of a tacrolimus production technology. Key words: Streptomyces tsukubensis, tacrolimus, FK-506, dissociant, genome, biosynthesis The research was carried out within the framework of the state assignment АААА-А16-116062110077-6.

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