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KMID : 0380020110260050439
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Korean Journal of Biotechnology and Bioengineering
2011 Volume.26 No. 5 p.439 ~ p.442
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1,2-Propanediol Production by Using Saccharomyces cerevisiae M3G3
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Koo Ja-Ryong
DaSilva Nancy A.
Yun Hyun-Shik
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Abstract
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1,2-propanediol (1,2-PD) is a commodity chemical that is currently produced from petrochemical derivatives. Saccharomyces cerevisiae is well characterized and a successful industrial microorganism to enable the improvement of the 1,2-propanediol production by metabolic engineering. A recombinant S. cerevisiae M3G3 was used to produce 1,2-propanediol. S. cerevisiae M3G3 is the diploid strain that contains 3 copies of mgs (methylglyoxal synthase) and gldA (glycerol dehydrogenase). S. cerevisiae M3G3 was cultivated at various culture conditions by changing culture temperature, glucose concentration, and inducer concentration. Also the effect of induction time was studied to optimize the production of 1,2-propanediol. Batch and fed-batch cultivation of S. cerevisiae M3G3 was performed by using a 5 L jar fermenter. The highest concentration of 1,2-propanediol in batch cultivation was 0.86 g/L and it was further improved to 1.33 g/L in fed-batch cultivation.
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KEYWORD
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1,2-Propanediol, Saccharomyces cerevisiae, mgs, gldA, fermentation
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