Applied Biochemistry and Biotechnology

, Volume 159, Issue 1, pp 142–154

Production and Characterization of an Alkaline Thermostable Crude Lipase from an Isolated Strain of Bacillus cereus C7

Article

Abstract

A bacterial strain isolated from spoiled coconut and identified as Bacillus cereus was found capable of producing alkaline thermostable extracellular lipase. Optimum temperature, time, and pH for enzyme substrate reaction were found to be 60 °C, 10 min, and 8.0 respectively. Common surfactants except Triton X 100 and cetyltrimethylammonium bromide have no or very little inhibitory effects on enzyme activity. The enzyme was found to be stable in presence of oxidizing agents and protease enzyme. The maximum lipase production was achieved at 30–33 °C, pH 8.0 on 24 h of fermentation using 50 ml medium in a 250-ml Erlenmeyer flask. The superior carbon and nitrogen sources for lipase production were starch (2%) and ammonium sulfate (nitrogen level 21.2 mg/100 ml), peptone (nitrogen level 297 mg/100 ml), and urea (nitrogen level 46.62 mg/100 ml) in combination, respectively. The maximum enzyme activity obtained was 33 ± 0.567 IU/ml.

Keywords

Lipase Bacillus cereus Alkaline Thermostable Production Characterization 

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Copyright information

© Humana Press 2009

Authors and Affiliations

  1. 1.Department of Food Technology & Biochemical EngineeringJadavpur UniversityKolkataIndia

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