PROTEASE OF IMPROVED TYPE OBTAINED FROM MICROORGANISMS, PROVIDING MILK CLOTTING Russian patent published in 2013 - IPC C12N9/58 C12N15/52 C12N15/58 C12N15/63 C12P21/02 

FIELD: biotechnology.

SUBSTANCE: protease is presented which has enhanced milk clotting activity, containing amino acid sequence at least 80 % identical to SEQ ID NO: 3, where the said protease has at least one mutation selected from the group consisting of: (a) substitution of glutamine, corresponding to glutamine at a position of 265 in SEQ ID NO: 3, with amino acid; and (b) replacement of glutamine, corresponding to glutamine at a position of 266 in SEQ ID NO: 3, with amino acid. DNA is described which encodes the said protease, the expression vector containing the said DNA, and the cell transformed with the said vector, designed for expression of the said protease. The method of production of protease having enhanced milk clotting activity is proposed, comprising culturing the said transformed cell in the cultural medium and isolation of protease from the cultural medium.

EFFECT: invention enables to obtain the protease with enhanced milk clotting activity.

16 cl, 2 dwg, 4 tbl