Abstract

A protease producing microorganism was isolated from soil collected from a detergent industry and identified as Bacillus species. Isolate K-30 produced thermostable alkaline protease utilizing rice bran. The optimum conditions for protease activity was 55°C at pH 9 with 4% inoculum in the medium containing 1% rice bran after 96 h of incubation. Beef extract, tryptone and yeast extract were good nitrogen sources while lactose, starch, and sucrose were suitable for enzyme production. The extracellular production of the enzyme, its thermostable nature and compatibility with most commercial detergents are features which suggest its application in the detergent industry.

Highlights

  • Proteases are essential constituents of all forms of life on earth including prokaryotes, fungi, plants and animals

  • A protease producing microorganism was isolated from soil collected from a detergent industry and identified as Bacillus species

  • Alkaline proteases produced by Bacillus species are of great importance in detergent industry due to their high thermostability and pH stability

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Summary

Short Communication

A protease producing microorganism was isolated from soil collected from a detergent industry and identified as Bacillus species. Isolate K-30 produced thermostable alkaline protease utilizing rice bran. The optimum conditions for protease activity was 55°C at pH 9 with 4% inoculum in the medium containing 1% rice bran after 96 h of incubation. Tryptone and yeast extract were good nitrogen sources while lactose, starch, and sucrose were suitable for enzyme production. The extracellular production of the enzyme, its thermostable nature and compatibility with most commercial detergents are features which suggest its application in the detergent industry

INTRODUCTION
Screening of microorganism
Protease assay
Optimization of culture conditions for enzyme production
RESULTS AND DISCUSSION
Soybean meal
Full Text
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