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Fermentation Conditions and Media Optimization for Isocitric Acid Production from Ethanol byYarrowia lipolytica

Isocitric acid exists in the form of four stereoisomers, of which only thethreo-Ds-form (ICA) is a natural active compound, an intermediate of Krebs cycle, and suitable for nutritional and pharmaceutical use. In this paper, we propose a method for ICA production from ethanol by yeastYarrowia lipolytica. The effects of temperature, pH of the medium, and aeration on the growth of the producerY. lipolyticaVKM Y-2373 and synthesis of ICA were studied. An optimal fermentation regime, which ensures a good growth of the producer and directed synthesis of the target product, was determined. The producer is advised to carry out cultivation at 29°C and various pH of the medium and the oxygen concentration (pH 5 and pO220–25% (of saturation) during the growth period and pH 6 and pO250–55% (of saturation) during the acid formation) on a nutrient medium containing an increased content of zinc (0.6 mg/L), iron (1.2 mg/L), and 30 mM itaconic acid (inhibitor of isocitrate lyase—the key enzyme of ICA metabolism) should also be introduced into the nutrition medium. Such fermentation production mode provides 90.5 g/L ICA with process selectivity of 80%, mass yield (YICA) of 0.77 g/g, and energy yield (ηICA) of 0.278 g/g.
- Moscow Technological University Russian Federation
- Moscow State Institute of Radio Engineering, Electronics and Automation Russian Federation
- Moscow State Institute of Radio Engineering, Electronics and Automation Russian Federation
- Moscow State Technological University Russian Federation
- Russian Academy of Sciences Russian Federation
Yarrowia lipolytica, yeast cell, synthesis, Yarrowia, growth inhibition, iron, fermentation, Candida, alcohol, pH, zinc, Stereoisomerism, physical parameters, oxygen concentration, dissolved oxygen, ascorbic acid, Candida oleophila, stereoisomerism, Research Article, 570, Isocitrates, culture medium, Citric Acid Cycle, chemistry, rapeseed oil, Article, isocitric acid, mass yield, aldehyde dehydrogenase, controlled study, aeration, nonhuman, 660, Ethanol, carbon, alcohol oxidation, temperature, itaconic acid, isocitrate lyase, Isocitrate Lyase, Culture Media, fungus growth, Oxygen, oleic acid, hydrogen, carbon source, Fermentation, citric acid cycle, oxygen, metabolism, energy yield
Yarrowia lipolytica, yeast cell, synthesis, Yarrowia, growth inhibition, iron, fermentation, Candida, alcohol, pH, zinc, Stereoisomerism, physical parameters, oxygen concentration, dissolved oxygen, ascorbic acid, Candida oleophila, stereoisomerism, Research Article, 570, Isocitrates, culture medium, Citric Acid Cycle, chemistry, rapeseed oil, Article, isocitric acid, mass yield, aldehyde dehydrogenase, controlled study, aeration, nonhuman, 660, Ethanol, carbon, alcohol oxidation, temperature, itaconic acid, isocitrate lyase, Isocitrate Lyase, Culture Media, fungus growth, Oxygen, oleic acid, hydrogen, carbon source, Fermentation, citric acid cycle, oxygen, metabolism, energy yield
citations This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).29 popularity This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.Top 10% influence This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).Top 10% impulse This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.Top 10%
