Designer proteases
First Claim
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1. A method for obtaining a target specific protease, comprising the steps of:
- a) providing a DNA vector encoding a modified self-secreting endoprotease, wherein said endoprotease is comprised of a signal peptide sequence, an endoprotease catalytic domain, a target cleavage site of a target protein and a carboxy-terminal domain;
b) obtaining a library of said vectors, wherein the DNA encoding the endoprotease catalytic domain has been mutagenized; and
c) isolating from said library a vector that expresses a target specific protease that is able to cleave the target cleavage site of said target protein.
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Abstract
The invention provides a method for engineering and selecting an active protease able to cleave a user-defined target amino acid sequence. The method is useful for designing proteases for medical therapeutics and industrial applications.
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17 Claims
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1. A method for obtaining a target specific protease, comprising the steps of:
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a) providing a DNA vector encoding a modified self-secreting endoprotease, wherein said endoprotease is comprised of a signal peptide sequence, an endoprotease catalytic domain, a target cleavage site of a target protein and a carboxy-terminal domain;
b) obtaining a library of said vectors, wherein the DNA encoding the endoprotease catalytic domain has been mutagenized; and
c) isolating from said library a vector that expresses a target specific protease that is able to cleave the target cleavage site of said target protein. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A modified self-secreting endoprotease which has been engineered to cleave a user-defined target cleavage site, said endoprotease comprising:
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(a) a signal peptide sequence, (b) an endoprotease catalytic domain, (c) a target cleavage site and (d) a carboxy-terminal domain. - View Dependent Claims (16, 17)
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Specification