VERSIONS OF SERINE PROTEASE WITH MULTIPLE MUTATIONS Russian patent published in 2015 - IPC C12N9/52 C12N15/52 C12N15/63 

FIELD: chemistry.

SUBSTANCE: invention relates to field of biochemistry, in particular to isolated version of serine protease, containing, at least, from five to eight amino acid substitutions in positions, selected from the group, consisting of positions12, 14, 15, 16, 24, 35, 36, 39, 49, 54, 61, 63, 64, 65, 67, 69, 75, 76, 78, 79, 81, 86, 92, 93, 99, 109, 112, 121, 123, 125, 127, 143, 159, 179, 181, 184, 189, where substituting amino acid is selected from the group, consisting of F, G, L, V, I, S, A, Y, K, W, M, P, N, Q, T, E, H, R, C, N and D, where said substitutions are made in positions, equivalent to positions in protease Cellulomonas 69 B4, as well as to molecule of nucleic acid, which codes it. Described are: expression vector, which contains said molecule of nucleic acid, as well as host-cell, containing it. Also disclosed are cleaning composition, animal food, composition for fabric of leather processing, which contain said version of serine protease, as well as cleaning method with application of said cleaning composition.

EFFECT: claimed invention has improved caseinolytic activity and/or thermal stability, and/or stability in LAS, and/or improved casein hydrolysis in comparison with protease, which does not have said number of substitutions.

63 cl, 7 dwg, 21 tbl, 21 ex