Growth-Coupled Lipid Synthesis in Mortierella alpina LPM 301, a Producer of Arachidonic Acid |
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Authors: | Eroshin V K Dedyukhina E G Satroutdinov A D Chistyakova T I |
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Institution: | (1) Skryabin Institute of Biochemistry and Physiology of Microorganisms, Russian Academy of Sciences, pr. Nauki 5, Pushchino, Moscow oblast, 142290, Russia |
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Abstract: | Mortierella alpina LPM 301, a producer of arachidonic acid (ARA), was found to possess a unique property of intense lipid synthesis in the period of active mycelium growth. Under batch cultivation of this strain in glucose-containing media with potassium nitrate or urea, the bulk of lipids (28–35% of dry biomass) was produced at the end of the exponential growth phase and remained almost unaltered in the stationary phase. The ARA content of lipids comprised 42–50% at the beginning of the stationary phase and increased continuously after glucose depletion in the medium due to the turnover of intracellular fatty acids; by the end of fermentation (189–210 h), the amount of ARA reached 46–60% of the total fatty acids (16–19% of dry mycelium). Plausible regulatory mechanisms of the growth-coupled lipid synthesis in microorganisms are discussed. |
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Keywords: | lipids growth arachidonic acid Mortierella alpina |
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