Patent
The present invention provides serine protease variants produced there from. Specifically, the present invention provides serine protease variants having one or more substitutions as compared to a reference serine protease. In addition, the present invention provides compositions comprising these serine protease variants. In some embodiments, the present invention provides cleaning compositions comprising at least one of these serine protease variants.
1. An isolated subtilisin variant, wherein said subtilisin variant is a mature form having proteolytic activity and comprises an amino acid sequence comprising the combination of amino acid substitutions S188D-E271F, wherein the total net charge of the variant is 0, +1, +2, +3, +4, +5, −1, −2, −3, −4, or −5 relative to the total net charge of the Bacillus lentus subtilisin GG36 protease, and wherein the total net charge is obtained by one or more substitutions selected from: N43D, R45T, N62E, N76D, S101D, P129E, A158E, G159D, G159E, S166D, S188D, A230E, N18R, G20K, G20R, T22R, S24R, N43R, G118R, Q245R, H249R, N269R, E271F, and E271L, wherein the variant is a variant of a parent protease Bacillus lentus subtilisin GG36 protease comprising the amino acid sequence shown in SEQ ID NO: 2, and wherein amino acid positions of the protease variant are numbered according to the numbering of corresponding amino acid positions in the amino acid sequence of Bacillus amyloliquefaciens subtilisin BPN′ shown in SEQ ID NO:1, and wherein the variant has at least 90% amino acid sequence identity over its full length to SEQ ID NO: 2.
2. The isolated subtilisin variant of claim 1 having proteolytic activity comprising an amino acid sequence comprising a combination of amino acid substitutions selected from: T022A-N043R-S101G-S103A-V104I-G159D-S188D-L217E-A232V-Q245R-N248D-E271F, T022A-S101G-S103A-V104I-G159D-S188D-A232V-Q245R-N248D-E271F, T022A-N076D-S101G-S103A-V104I-G159D-S188D-A232V-Q245R-N248D-E271F, and T022A-N043R-N076D-S101G-S103A-V104I-G159D-S188D-A232V-Q245R-N248D-E271F, wherein the amino acid positions of the subtilisin variant are numbered by correspondence with the amino acid sequence of B. amyloliquefaciens subtilisin BPN′ set forth as SEQ ID NO:1.
3. The subtilisin variant of claim 1 , wherein said protease variant comprises an amino acid sequence which differs from the amino acid sequence of SEQ ID NO:2, and wherein the total net charge of the protease variant is 0, +1, +2, +3, +4, +5, −1, −2, −3, −4, or −5 relative to the total net charge of the Bacillus lentus subtilisin GG36 protease, wherein the parent protease is GG36, and wherein amino acid positions of the protease variant are numbered according to the numbering of corresponding amino acid positions in the amino acid sequence of Bacillus amyloliquefaciens subtilisin BPN′ shown in SEQ ID NO:1.
4. The subtilisin variant of claim 1 , wherein the variant has at least 95% identity to SEQ ID NO: 2.
5. The subtilisin variant of claim 1 , wherein the subtilisin variant has one or more of the following characteristics: a) a Test Method 2 performance index of at least 1.1; b) a Test Method 3 performance index of at least 1.1; c) a Test Method 4 performance index of at least 1.1; and/or d) a Test Method 6 performance index of at least 1.1.
6. A composition comprising at least one subtilisin variant of claim 1 , wherein said composition is a fabric and home care product.
7. The composition of claim 6 , wherein said composition is a cleaning composition.
8. The composition of claim 6 , wherein said cleaning composition is a granular, powder, solid, bar, liquid, tablet, gel, or paste composition.
9. The composition of claim 6 , further comprising at least one bleaching agent.
10. The composition of claim 6 , wherein said cleaning composition is phosphate-free.
11. The composition of claim 6 , wherein said cleaning composition contains phosphate.
12. The composition of claim 6 , further comprising at least one additional enzyme.
13. The composition of claim 12 , wherein said at least one additional enzyme is selected from hemicellulases, cellulases, peroxidases, proteases, metalloproteases, xylanases, lipases, phospholipases, esterases, perhydrolases, cutinases, pectinases, pectate lyases, mannanases, keratinases, reductases, oxidases, phenoloxidases, lipoxygenases, ligninases, pullulanases, tannases, pentosanases, malanases, β-glucanases, arabinosidases, hyaluronidases, chondroitinases, laccases, and amylases, and any combination thereof.
14. A method of cleaning, comprising contacting a surface or an item with a cleaning composition comprising at least one subtilisin variant of claim 1 .