Subtilase variants
The present invention relates to novel subtilase variants exhibiting alterations relative to the parent subtilase in one or more properties including: Wash performance, thermal stability, storage stability or catalytic activity. 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.
1. An isolated variant of a parent subtilase comprising a set of amino acid substitutions corresponding to residues selected from the group consisting of:
S9R+A13V+A15T+l35V+N62D+Q245F; and
S9R+A15T+G20*+L21F+N62D+Q245N;
wherein each amino acid position is numbered by correspondence to a position in the amino acid sequence of subtilisin BPN′ as set forth in SEQ ID NO:1.
2. An isolated variant of a parent subtilase comprising a set of amino acid substitutions corresponding to residues selected from the group consisting of:
S9R+A15T+T22TG+N62D+V139L+Q245G;
S9R+A15T+T22TG+N62D+V139L+Q245S;
S9R+A15T+T22TG+N62D+V139L+Q245V;
S9R+A15T+T22TL+N62D+I107V+V139L+Q245W; and
S9R+A15T+T22TL+N62D+Q245W;
wherein each amino acid position is numbered by correspondence to a position in the amino acid sequence of subtilisin BPN′ as set forth in SEQ ID NO:1.
3. The isolated subtilase variant of claim 1 or claim 2 , wherein the parent subtilase belongs to sub-group I-S1.
4. The isolated subtilase variant of claim 1 or claim 2 , wherein the parent subtilase belongs to sub-group I-S2.
5. The isolated subtilase variant of claim 1 or claim 2 , wherein the parent subtilase is subtilisin 309.
6. A cleaning or detergent composition, comprising the isolated subtilase variant of claim 1 or claim 2 and a surfactant.
7. The composition of claim 6 , which comprises one or more additional enzymes.
8. The composition of claim 7 , which additionally comprises one or more enzymes selected from the group consisting of an amylase, a cellulase, a cutinase, an esterase, a beta-galactosidase, a glycoamylase, a hemicellulase, a lactase, a ligninase, a lipase, a polygalacturonase, and a protease.
9. An isolated DNA sequence encoding the subtilase variant of claim 1 or claim 2 .
10. An expression vector comprising the isolated DNA sequence of claim 9 .
11. A microbial host cell transformed with the expression vector of claim 10 .
12. The microbial host cell of claim 11 , which is a Bacillus host cell.
13. A method for producing a subtilase variant, comprising
(a) culturing the host of claim 11 under conditions conducive to the expression and secretion of the subtilase variant, and
(b) recovering the secreted subtilase variant from the culture.