Abstract
Candida famata (Candida flareri) belongs to the group of so-called 'flavinogenic yeasts', capable of riboflavin oversynthesis under condition of iron starvation. Some strains of C. famata belong to the most flavinogenic organisms known and were used for industrial production of riboflavin for a long time in the USA. C. famata is characterized by high salt tolerance, growing at NaCl concentrations of up to 2.5 M. Development of basic tools for the metabolic engineering of C. famata, such as a transformation system, selective markers, insertional mutagenesis, a reporter system and others, are described. The developed tools were used for cloning and identification of structural and regulatory genes of riboflavin synthesis. The construction of improved yeast strains producing riboflavin, FMN and FAD, based on the industrial riboflavin-producing strain dep8 and its non-reverting analogue AF4, is also described.
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