Improvement of the enantioselectivity and activity of lipase from Pseudomonas sp. via adsorption on a hydrophobic support: kinetic resolution of 2-octanol

Abstract

Pseudomonas sp. lipase (PSL) was successfully immobilized on a novel hydrophobic polymer support through physical adsorption and the immobilized PSL was used for resolution of (R,S)-2-octanol with vinyl acetate as acyl donor. Enhanced activity and enantioselectivity were observed from the immobilized PSL compared with free PSL. The effects of reaction conditions such as temperature, water activity, substrate molar ratio and the amount of immobilized lipase were investigated. Under optimum conditions, the residual (S)-2-octanol was recovered with 99.5% enantiomeric excess at 52.9% conversion. The results also indicated that the immobilized PSL could maintain 94% of its initial activity even after reusing it five times.

• Pseudomonas sp. lipase
• hydrophobic support
• immobilization
• resolution
• 2-octanol