Recombinant yeast host cells comprising FE-S cluster proteins
First Claim
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1. A recombinant yeast host cell comprising at least two engineered modifications comprising:
- (i) a heterologous dihydroxy-acid dehydratase Fe—
S cluster protein expressed in the cytosol of the recombinant yeast host cell, wherein the heterologous dihydroxy-acid dehydratase Fe—
S cluster protein is a polypeptide having an amino acid sequence that is at least 90% identical to SEQ ID NO;
114 using the Clustal W method of alimment using the default parameters of GAP PENALTY=10, GAP LENGTH PENALTY=0,1, and Gonnet 250 series of protein weight matrix over the full length of the protein sequence and has a specific activity of at least 0.2 μ
mol min−
1 mg−
1; and
(ii) an endogenous Fe—
S cluster protein with reduced expression, wherein the endogenous Fe—
S cluster protein is dihydroxy-acid dehydratase.
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Abstract
Yeast strains were engineered that have increased activity of heterologous proteins that require binding of an Fe—S cluster for their activity. The yeast strains have reduced activity of an endogenous Fe—S protein. Activities of heterologous fungal or plant 2Fe-2S dihydroxy-acid dehydratases and Fe—S propanediol dehydratase reactivase were increased for increased production of products made using biosynthetic pathways including these enzymes, such as valine, isoleucine, leucine, pantothenic acid (vitamin B5), isobutanol, 2-butanone and 2-butanol.
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Citations
8 Claims
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1. A recombinant yeast host cell comprising at least two engineered modifications comprising:
-
(i) a heterologous dihydroxy-acid dehydratase Fe—
S cluster protein expressed in the cytosol of the recombinant yeast host cell, wherein the heterologous dihydroxy-acid dehydratase Fe—
S cluster protein is a polypeptide having an amino acid sequence that is at least 90% identical to SEQ ID NO;
114 using the Clustal W method of alimment using the default parameters of GAP PENALTY=10, GAP LENGTH PENALTY=0,1, and Gonnet 250 series of protein weight matrix over the full length of the protein sequence and has a specific activity of at least 0.2 μ
mol min−
1 mg−
1; and(ii) an endogenous Fe—
S cluster protein with reduced expression, wherein the endogenous Fe—
S cluster protein is dihydroxy-acid dehydratase. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification