Protease producing an altered immunogenic response and methods of making and using the same
The present invention provides novel protein variants that exhibit reduced immunogenic responses, as compared to the parental proteins. The present invention further provides DNA molecules that encode novel variants, host cells comprising DNA encoding novel variants, as well as methods for making proteins less allergenic. In addition, the present invention provides various compositions that comprise these proteins that are less immunogenic than the wild-type proteins.
1. A variant of a subtilisin comprising a T-cell epitope, wherein said subtilisin variant has proteolytic activity and an amino acid sequence at least 85% identical to the amino acid sequence set forth in SEQ ID NO:2 and differs from said subtilisin by having an altered T-cell epitope such that said subtilisin variant exhibits an altered immunogenic response from said subtilisin in a human; wherein said altered T-cell epitope of said subtilisin variant comprises an amino acid substitution of glycine, isoleucine, leucine, methionine, phenylalanine, proline, tryptophan, or tyrosine at an amino acid position corresponding to position 26 of SEQ ID NO:2.
2. The variant of claim 1 wherein said immunogenic response produced by said subtilisin variant is less than said immunogenic response produced by said subtilisin.
3. The variant of claim 2 , wherein said immunogenic response produced by said subtilisin variant is characterized by an in vivo reduction in allergenicity, as compared to said subtilisin.
4. The variant of claim 2 , wherein said immunogenic response produced by said subtilisin variant is characterized by an in vitro reduction in human peripheral blood mononuclear cell proliferation, as compared to said subtilisin.
5. The variant of claim 1 wherein said immunogenic response produced by said subtilisin variant is greater than said immunogenic response produced by said subtilisin.
6. A composition selected from the group consisting of cleaning compositions, and personal care products, wherein said composition comprises the subtilisin variant of claim 1 .
7. A skin care composition comprising a variant of a subtilisin comprising a T-cell epitope, wherein said subtilisin variant has proteolytic activity and an amino acid sequence at least 85% identical to the amino acid sequence set forth in SEQ ID NO:2 and differs from said subtilisin by having an altered T-cell epitope such that said subtilisin variant and said subtilisin produce different immunogenic responses in a human; wherein said altered T-cell epitope of said subtilisin variant comprises an amino acid substitution of glycine, isoleucine, leucine, methionine, phenylalanine, proline, tryptophan, or tyrosine at an amino acid position corresponding to position 26 of SEQ ID NO:2.
8. The skin care composition of claim 7 , further comprising a cosmetically acceptable carrier.
9. The skin care composition of claim 8 , wherein said carrier comprises at least one hydrophilic diluent selected from the group consisting of water, propylene glycol, ethanol, propanol, glycerol, butylene glycol, polyethylene glycol having a molecular weight from about 200 to about 600, and polypropylene glycol having a molecular weight from about 425 to about 2025.
10. The skin care composition of claim 7 , further comprising at least one skin care active.
11. The skin care composition of claim 10 , wherein said skin care active is selected from the group consisting of Vitamin B3 component, panthenol, Vitamin E, Vitamin E acetate, retinol, retinyl propionate, retinyl palmitate, retinoic acid, Vitamin C, theobromine, alpha-hydroxyacid, farnesol, phytrantriol, salicylic acid, and palmityl peptapeptide-3.
12. The skin care composition of claim 11 , wherein said Vitamin B3 component is niacinamide.
13. The skin care composition of claim 7 , further comprising glycerine.
14. A skin care composition comprising:
a) from about 0.00001% to about 1%, by weight, of a variant of a subtilisin comprising a T-cell epitope, wherein said subtilisin variant has proteolytic activity and an amino acid sequence at least 85% identical to the amino acid sequence set forth in SEQ ID NO:2 and differs from said subtilisin by having an altered T-cell epitope such that said subtilisin variant and said subtilisin produce different immunogenic responses in a human; wherein said T-cell epitope of said protease of interest comprises an amino acid substitution of glycine, isoleucine, leucine, methionine, phenylalanine, proline, tryptophan, or tyrosine at an amino acid position corresponding to position 26 of SEQ ID NO:2;
b) from about 0.01% to about 20%, by weight, of a humectant;
c) from about 0.1% to about 20%, by weight, of a skin care active;
d) from about 0.05% to about 15%, by weight, of a surfactant; and
e) from about 0.1% to about 20%, by weight, of silicone.
15. A cleaning composition comprising at least one variant of a subtilisin comprising a T-cell epitope, wherein said subtilisin variant has proteolytic activity and an amino acid sequence at least 85% identical to the amino acid sequence set forth in SEQ ID NO:2 and differs from said subtilisin by having an altered T-cell epitope such that said subtilisin variant and said subtilisin produce different immunogenic responses in a human; wherein said altered T-cell epitope of said subtilisin variant comprises an amino acid substitution of glycine, isoleucine, leucine, methionine, phenylalanine, proline, tryptophan, or tyrosine at an amino acid position corresponding to position 26 of SEQ ID NO:2.
16. A nucleic acid encoding the subtilisin variant of claim 1 .
17. An expression vector comprising the nucleic acid of claim 16 .
18. A host cell transformed with the expression vector of claim 17 .