Proteases of altered stability to autolytic degradation

Chemistry: molecular biology and microbiology – Micro-organism – tissue cell culture or enzyme using process... – Recombinant dna technique included in method of making a...

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435 681, 435 692, 435 701, 435 711, 435 712, 4351723, 435188, 435219, 435220, 530300, 530324, 530350, C12P 2100, C07K 1300, C12N 900

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055433022

ABSTRACT:
Proteases are susceptible to autolytic degradation. The method of the invention provides a method to identify susceptible autolysis sites which are cleaved to produce a few discrete fragments. Once identified, amino acid(s) at or in the vicinity of the cleavage site may be chemically modified or the DNA sequence capable of encoding the amino acid present at the site may be changed or deleted by site directed mutagenesis to produce an autolysis stable protease. The invention is particularly applicable to alkaline proteases which are produced in large quantities and used as detergent additives. Stable alkaline proteases could then be used in liquid detergent formulations.

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