Reduction of the toxic effect of impurities from raw materials by extractive fermentation
First Claim
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1. A method of producing a bioproduct from engineered microbial cells, comprising:
- (a) providing an aqueous fermentation broth comprising a crude carbon source;
(b) inoculating said fermentation broth with microbial cells, engineered to enhance expression of one or more of a gene encoding an enzyme selected from the group consisting of thioesterase, acyl-CoA synthase, and ester synthase, and wherein a gene encoding an acyl-CoA dehydrogenase is attenuated or absent in the engineered microbial cells;
(c) incubating the inoculated fermentation broth;
(d) thereby producing and secreting a bioproduct; and
(e) treating said fermentation broth with a hydrophobic solvent wherein a toxic side product present in said crude carbon source is soluble in said hydrophobic solvent.
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Abstract
There are provided bioproducts and methods of improving production of the bioproducts from engineered microbial cells, the methods comprising: providing a fermentation broth comprising a crude carbon source; inoculating said fermentation broth with said microbial cells; and incubating the inoculated fermentation broth; wherein said bioproduct is a hydrophobic solvent immiscible with said fermentation broth, and wherein a toxic side product present in said crude carbon source is soluble in said hydrophobic solvent. Also, provided are kits for practicing the methods of improving production of bioproducts.
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16 Claims
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1. A method of producing a bioproduct from engineered microbial cells, comprising:
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(a) providing an aqueous fermentation broth comprising a crude carbon source; (b) inoculating said fermentation broth with microbial cells, engineered to enhance expression of one or more of a gene encoding an enzyme selected from the group consisting of thioesterase, acyl-CoA synthase, and ester synthase, and wherein a gene encoding an acyl-CoA dehydrogenase is attenuated or absent in the engineered microbial cells; (c) incubating the inoculated fermentation broth; (d) thereby producing and secreting a bioproduct; and (e) treating said fermentation broth with a hydrophobic solvent wherein a toxic side product present in said crude carbon source is soluble in said hydrophobic solvent. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method of producing a bioproduct from engineered microbial cells, comprising:
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(a) providing an aqueous fermentation broth comprising a crude carbon source; (b) inoculating said fermentation broth with engineered microbial cells wherein the engineered microbial cells are engineered to enhance expression of a gene encoding an enzyme selected from the group consisting of thioesterase, acyl-CoA synthase, and ester synthase and wherein a gene encoding an acyl-CoA dehydrogenase is attenuated or absent in the engineered microbial cell; and (c) incubating the inoculated fermentation broth, wherein the engineered microbial cells produce a bioproduct and said bioproduct is a hydrophobic solvent immiscible with said fermentation broth, wherein any toxic side product present in said crude carbon source is soluble in a hydrophobic solvent. - View Dependent Claims (16)
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Specification