Uptake and accumulation of B-group vitamers in Saccharomyces cerevisiae in ethanol-stat fed-batch culture
| Autor: | Toomas Paalme, Kaspar Kevvai, A. Vilbaste, Ildar Nisamedtinov, Kristel Hälvin |
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| Rok vydání: | 2014 |
| Předmět: |
Vitamin
Physiology Riboflavin Saccharomyces cerevisiae Applied Microbiology and Biotechnology Cofactor chemistry.chemical_compound Pantothenic acid medicine Ethanol metabolism Ethanol biology Nicotinamide food and beverages General Medicine Pyridoxine Culture Media Biochemistry chemistry Batch Cell Culture Techniques Vitamin B Complex biology.protein Thiamine human activities Biotechnology medicine.drug |
| Zdroj: | World Journal of Microbiology and Biotechnology. 30:2351-2359 |
| ISSN: | 1573-0972 0959-3993 |
| DOI: | 10.1007/s11274-014-1660-x |
| Popis: | The uptake and accumulation of the B-group vitamins thiamine, riboflavin, nicotinamide, pantothenic acid and pyridoxine in Saccharomyces cerevisiae was studied by gradually increasing the specific dosage of vitamins in an ethanol-stat fed-batch culture. Thiamine, nicotinamide, pantothenic acid, and pyridoxine were almost completely taken up at low vitamin dosages. Thiamine was determined to be the major accumulating form of vitamin B1 while most of the assimilated nicotinamide and pantothenic acid accumulated in cofactor forms. Despite the obvious uptake of pyridoxine, accumulation of B6 vitamers was not observed. In contrast with the other vitamins studied, riboflavin began accumulating in the culture medium immediately after vitamin addition was initiated. By the end of the experiment, the apparent uptake of all vitamins exceeded their accumulation in the cells. Variations in the growth rate of yeast at different vitamin dosages demonstrate the importance of balancing the vitamins in the media during cultivation. |
| Databáze: | OpenAIRE |
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