Methods for control of flux in metabolic pathways through enzyme relocation
First Claim
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1. A bacterial cell that expresses enzymes of a biosynthetic pathway for production of a product, wherein at least one of the enzymes:
- (i) controls metabolic flux in the biosynthetic pathway;
(ii) is modified by genetic means to attach a periplasmic-targeting sequence; and
(iii) is selected from the group consisting of amidophosphoribosyl transferase, orotate phosphoribosyltransferase, 2-dehydro-3-deoxyphosphoheptonate aldolase, phosphoribosyltransferase HisG, acetolactate/acetohydroxybutanoate synthase, UDP-N-acetylglucosamine acyltransferase, aspartate aminotransferase, arginine decarboxylase, GTP cyclohydrolase I, acetyl-CoA carboxylase, 2-keto-acid decarboxylase, acetyl-CoA acetyltransferase, and beta-ketothiolase,wherein the product is selected from the group consisting of antibiotics, biosurfactants, biological fuels, amino acids, organic acids, fatty acids, alcohols, polyols, flavors, fragrances, nucleotides, vitamins, pigments, sugars, polysaccharides, biopolymers, plastics, isoprenoids, terpenes, and cell metabolites.
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Abstract
Genetically manipulated cells, lysates of such cells, systems, and methods of use thereof are provided, where one or more enzymes in a pathway of interest are genetically modified to incorporate a peptide sequence that provides for relocation of the protein, e.g., to the periplasm, so as to sequester the enzyme, and where the enzyme controls flux in the pathway of interest.
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Citations
17 Claims
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1. A bacterial cell that expresses enzymes of a biosynthetic pathway for production of a product, wherein at least one of the enzymes:
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(i) controls metabolic flux in the biosynthetic pathway; (ii) is modified by genetic means to attach a periplasmic-targeting sequence; and (iii) is selected from the group consisting of amidophosphoribosyl transferase, orotate phosphoribosyltransferase, 2-dehydro-3-deoxyphosphoheptonate aldolase, phosphoribosyltransferase HisG, acetolactate/acetohydroxybutanoate synthase, UDP-N-acetylglucosamine acyltransferase, aspartate aminotransferase, arginine decarboxylase, GTP cyclohydrolase I, acetyl-CoA carboxylase, 2-keto-acid decarboxylase, acetyl-CoA acetyltransferase, and beta-ketothiolase, wherein the product is selected from the group consisting of antibiotics, biosurfactants, biological fuels, amino acids, organic acids, fatty acids, alcohols, polyols, flavors, fragrances, nucleotides, vitamins, pigments, sugars, polysaccharides, biopolymers, plastics, isoprenoids, terpenes, and cell metabolites. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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Specification