Biochemical characterisation of lipase from a new strain of Bacillus sp. ITP-001

JMP Barbosa, RL Souza, CM Melo, AT Fricks… - Química …, 2012 - SciELO Brasil
Química Nova, 2012SciELO Brasil
Lipases are characterised mainly by catalytic versatility and application in different industrial
segments. The aim of this study was to biochemically characterise a lipase from a new strain
of Bacillus sp. ITP-001. The isoelectric point and molecular mass were 3.12 and 54 kDa,
respectively. The optima lipase activity was 276 U g-1 at pH 7.0 and a temperature of 80 ºC,
showing greater stability at pH 5.0 and 37 ºC. Enzymatic activity was stimulated by various
ions and pyridine, and inhibited by Cu+ and ethanol. The values of Km and v max were …
Lipases are characterised mainly by catalytic versatility and application in different industrial segments. The aim of this study was to biochemically characterise a lipase from a new strain of Bacillus sp. ITP-001. The isoelectric point and molecular mass were 3.12 and 54 kDa, respectively. The optima lipase activity was 276 U g-1 at pH 7.0 and a temperature of 80 ºC, showing greater stability at pH 5.0 and 37 ºC. Enzymatic activity was stimulated by various ions and pyridine, and inhibited by Cu+ and ethanol. The values of Km and v max were 105.26 mmol and 0.116 mmol min-1 g-1, respectively determined by the Eadie-Scatchard method.
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