Expression of procollagen in yeast
First Claim
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1. A method for making a mammalian collagen or procollagen in yeast, the method comprising the steps of:
- (a) incubating a yeast cell comprising;
(i) a stable genetic construct comprising in opposite orientations, first and second mammalian collagen genes operably linked to a first single divergent heterologous promoter;
(ii) a prolyl hydroxylase gene;
(iii) a protein disulfide isomerase gene, wherein the prolyl hydroxylase and protein disulfide isomerase genes are expressed to produce polypeptides that are associated into active proteins during the incubating step, in a medium under conditions wherein the collagen genes are expressed as procollagen chains and the chains secreted in the form of triple helical procollagen; and
(b) recovering the triple helical procollagen.
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Abstract
The invention discloses methods for effecting the production of recombinant mammalian procollagen in yeast, as well as compositions comprising yeast cells cap producing mammalian procollagen.
35 Citations
25 Claims
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1. A method for making a mammalian collagen or procollagen in yeast, the method comprising the steps of:
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(a) incubating a yeast cell comprising;
(i) a stable genetic construct comprising in opposite orientations, first and second mammalian collagen genes operably linked to a first single divergent heterologous promoter;
(ii) a prolyl hydroxylase gene;
(iii) a protein disulfide isomerase gene, wherein the prolyl hydroxylase and protein disulfide isomerase genes are expressed to produce polypeptides that are associated into active proteins during the incubating step, in a medium under conditions wherein the collagen genes are expressed as procollagen chains and the chains secreted in the form of triple helical procollagen; and
(b) recovering the triple helical procollagen. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method for making a mammalian collagen or procollagen in yeast, the method comprising the steps of:
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(a) incubating a yeast cell comprising;
(i) a stable genetic construct comprising in opposite orientations, first and second mammalian collagen genes operably linked to a first single divergent heterologous promoter;
(ii) a prolyl hydroxylase gene;
(iii) a protein disulfide isomerase gene, wherein the prolyl hydroxylase and protein disulfide isomerase genes are expressed to produce polypeptides that are associated into active proteins during the incubating step, in a medium under conditions wherein the collagen genes are expressed as procollagen chains and the chains secreted in the form of triple helical procollagen, wherein the yeast cell is Saccharomyces cerevisiae, the prolyl hydroxylase and protein disulfide isomerase genes are integrated into the genome of the yeast, the first single divergent heterologous promoter is a GAL1-10 promoter, the collagen genes reside on a plasmid in the yeast, the prolyl hydroxylase gene and protein disulfide isomerase genes are operably linked to a second single divergent heterologous promoter, the first and second single divergent heterologous promoters are the same, and the mammalian collagen genes are human collagen genes; and
(b) recovering the triple helical procollagen. - View Dependent Claims (14)
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15. A yeast cell comprising:
- (i) a stable genetic construct comprising in opposite orientations, first and second mammalian collagen genes operably linked to a first single divergent heterologous promoter;
(ii) a prolyl hydroxylase gene; and
(iii) a protein disulfide isomerase gene. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
- (i) a stable genetic construct comprising in opposite orientations, first and second mammalian collagen genes operably linked to a first single divergent heterologous promoter;
Specification