Variant proteases and amylases having enhanced storage stability
The present invention relates to novel subtilase variants exhibiting increased stability and preferably on par or improved wash performance. The variants of the invention are suitable for use in e.g. cleaning or detergent compositions, such as laundry detergent compositions and dish wash compositions, including automatic dish wash compositions. The present invention also relates to isolated DNA sequences encoding the variants, expression vectors, host cells, and methods for producing and using the variants of the invention.
1. A subtilase variant having protease activity and having at least 25% improved stability compared to a subtilase with SEQ ID NO: 1, when measured as described in the accelerated storage stability assay in Example 3 herein, wherein the amino acid sequence of the variant subtilase has at least 90% but less than 100% sequence identity to the amino acid sequence of SEQ ID NO: 1, and wherein the subtilase variant comprises the substitutions X9E, X76D, and X262E, wherein each position corresponds to the position of the polypeptide of SEQ ID NO: 2.
2. The subtilase variant according to claim 1 , wherein said subtilase variant further comprises one or more of the substitutions selected from the group consisting of X43A, X43C, X43L, X43R, X43W, X72A, X72V, X78D, X104F, X114V, X115T, X115W, X120I , X120T, X120V, X129D, X147W, X149C, X149N, X158E, X160D, X160P, X161C, X161E, X163A, X163D, X182C, X182E, X185C, X185E, X188C, X188D, X188E, X191N, X204D, X204V, X205I , X206C, X206E, X206I , X206K, X206L, X206T, X206V, X206W, X209W, X212A, X212D, X212G, X212N, X216I , X216T, X216V, X217C, X217M, X218T, X222C, X222R, X225A, X255C, X255E, X256A, X256C, X256D, X256V, X256Y, X259D, X260E, X260P, X261C, X261E, X261L, X261M, X261V, X261W, X261Y, and X261F, wherein each position corresponds to the position of the polypeptide of SEQ ID NO: 2.
3. The subtilase variant of claim 1 , wherein the total number of alterations compared to SEQ ID NO: 1 is between 3 and 30.
4. The variant of claim 1 , further comprising one or more of the substitutions selected from the group consisting of S3T, V41, A15T, S24G, S24R, V68A, S99D, S99E, S101R, S101K, S101N, S101M, S101E, S101D, S101L, S101I , S103A, V104I , S128A, S128L, S128S, P129N, P129Q S130A, V199M, L217Y, L217D, L217E, L217Q, N218D, N218E, Q245K and Q245R (numbering according to SEQ ID NO: 2).
5. The variant of claim 1 , which has an improved wash performance compared to the subtilase with SEQ ID NO: 1, when measured in an Automatic Mechanical Stress Assay (AMSA).
6. A detergent composition comprising a variant according to claim 1 , wherein the detergent further comprises one or more detergent components.
7. The detergent composition according to claim 6 , further comprising one or more additional enzymes selected from the group consisting of proteases, amylases, lipases, cutinases, cellulases, endoglucanases, xyloglucanases, pectinases, pectin lyases, xanthanases, peroxidases, haloperoxygenases, catalases, mannanases, and any mixture thereof.
8. The detergent composition according to claim 6 in the form of a bar, a homogenous tablet, a tablet having two or more layers, a pouch having one or more compartments, a regular or compact powder, a granule, a paste, a gel, a regular liquid, a compact liquid, or a concentrated liquid.
9. A method for producing a subtilase variant having protease activity and having at least 25% improved stability compared to a subtilase with SEQ ID NO: 1 when measured as described in the accelerated storage stability assay in Example 3 herein, comprising
a. introducing into a parent subtilase the substitutions X9E, X76D, and X262E, wherein each position corresponds to the position of the polypeptide of SEQ ID NO: 2, and the amino acid sequence of the subtilase variant has at least 90% but less than 100% sequence identity to the amino acid sequence of SEQ ID NO: 1, and
b. recovering the variant.
10. The subtilase variant of claim 1 , wherein the amino acid sequence of the variant has at least 95% but less than 100% sequence identity to the amino acid sequence of SEQ ID NO: 1.
11. The subtilase variant of claim 1 , wherein the subtilase variant consists of the substitutions S9E, N76D, and L262E, wherein each position corresponds to the position of the polypeptide of SEQ ID NO: 2.
12. The method of claim 9 , further comprising introducing into the parent subtilase one or more alterations from the group consisting of S9C, S9D, S9E, S9Q, N43A, N43C, N43L, N43R, N43W, 172A, 172V, S78D, V104F, A114V, G115T, G115W, H120I, H120T, H120V, P129D, V147W, V1490, V149N, A158E, G160D, G160P, S161C, S161E, S163A, S163D, Q1820, Q182E, N1850, N185E, S1880, S188D, S188E, Q191N, N204D, N204V, V205I , Q206C, Q206E, Q206I , Q206K, Q206T, Q206V, Q206W, Q206L Y209W, S212A, S212D, S212G, S212N, S216I , S216T, S216V, L2170, L217M, N218T, M222C, M222R, P225A, T255C, T255E, S256A, S256C, S256D, S256V, S256Y, S259D, T260E, T260P, N2610, N261E, N261L, N261M, N261V, N261Y, N261W, N261F, L262C, L262E and L262Q.
13. The method of claim 9 , wherein the substitutions consisting of S9E, N76D, and L262E are introduced into the parent subtilase, wherein each position corresponds to the position of the polypeptide of SEQ ID NO: 2.