Alkaline protease variants
First Claim
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1. A recombinant protein comprising (a) an amino acid sequence consisting of SEQ ID NO:
- 2 or (b) an amino acid sequence having 95% or more identity with SEQ ID NO;
2, in which, in both (a) and (b), glutamine at SEQ ID NO;
2 position 204 or at a position corresponding thereto is substituted with;
glutamic acid, aspartic acid, cysteine, valine, threonine, proline, histidine, isoleucine, tryptophan, serine, asparagine, lysine or arginine,and wherein the amino acid sequence has alkaline protease activity to cleave the substrate Glt-Ala-Ala-Pro-Leu-pNA to release p-nitroaniline.
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Abstract
The invention is directed to an alkaline protease that has the amino acid sequence of SEQ ID NO: 2 or of an amino acid sequence having an identity of 90% or more thereto, except that one or more amino acid residues at positions selected from (a) position 6, (b) position 15, (c) position 16, (d) position 65, (e) position 66, (f) position 82, (g) position 83, (h) position 204, (i) position 319, and (j) position 337 of SEQ ID NO: 2, or at positions corresponding thereto, are substituted with certain other amino acid residues. The invention is also directed to detergent compositions and culture medium that contain the protease.
13 Citations
16 Claims
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1. A recombinant protein comprising (a) an amino acid sequence consisting of SEQ ID NO:
- 2 or (b) an amino acid sequence having 95% or more identity with SEQ ID NO;
2, in which, in both (a) and (b), glutamine at SEQ ID NO;
2 position 204 or at a position corresponding thereto is substituted with;
glutamic acid, aspartic acid, cysteine, valine, threonine, proline, histidine, isoleucine, tryptophan, serine, asparagine, lysine or arginine,and wherein the amino acid sequence has alkaline protease activity to cleave the substrate Glt-Ala-Ala-Pro-Leu-pNA to release p-nitroaniline. - View Dependent Claims (2, 15)
- 2 or (b) an amino acid sequence having 95% or more identity with SEQ ID NO;
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3. A detergent composition comprising a protein comprising (a) an amino acid sequence consisting of SEQ ID NO:
- 2 or (b) an amino acid sequence having 95% or more identity with SEQ ID NO;
2, in which, in both (a) and (b), glutamine at SEQ ID NO;
2 position 204 or at the position corresponding thereto is substituted with;
glutamic acid, aspartic acid, cysteine, valine, threonine, proline, histidine, isoleucine, tryptophan, serine, asparagine, lysine or arginine,and wherein the amino acid sequence has alkaline protease activity to cleave the substrate Glt-Ala-Ala-Pro-Leu-pNA to release p-nitroaniline. - View Dependent Claims (4)
- 2 or (b) an amino acid sequence having 95% or more identity with SEQ ID NO;
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5. A recombinant protein comprising an amino acid sequence consisting of an amino acid sequence having 95% or more identity with the amino acid sequence of SEQ ID NO:
- 2, and in which the amino acid at SEQ ID NO;
2 position 204, or at the position corresponding thereto, is aspartic acid, and wherein the amino acid sequence has alkaline protease activity to cleave the substrate Glt-Ala-Ala-Pro-Leu-pNA to release p-nitroaniline. - View Dependent Claims (6, 7, 8, 9, 16)
- 2, and in which the amino acid at SEQ ID NO;
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10. Culture medium from the culture of an isolated transformed host cell that contains a recombinant protein produced by the host cell, wherein the amino acid sequence of the recombinant protein comprises an amino acid sequence consisting of a sequence having 95% or more identity with SEQ ID NO:
- 2, and in which the amino acid at SEQ ID NO;
2 position 204, or the position corresponding thereto, is aspartic acid, and wherein the amino acid sequence has alkaline protease activity to cleave the substrate Glt-Ala-Ala-Pro-Leu-pNA to release p-nitroaniline. - View Dependent Claims (11, 12, 13, 14)
- 2, and in which the amino acid at SEQ ID NO;
Specification