Abstract
Free fatty acids (FFAs) are a useful feedstock for a range of industrial chemical synthesis applications. However, efficiently converting FFAs to molecules for biofuel and other high-value chemicals requires more efficient and cost-effective catalysts. Cytochrome P450 fatty acid peroxygenases (CYP152) have a unique chemistry that allows use of the peroxide shunt pathway for biochemical conversion of FFAs. Known CYP152s are heat labile, however, requiring characterization of more thermotolerant versions for use in industrial applications. A fatty acid peroxygenase from Bacillus methanolicus (CYP152K6) was shown here to have a higher optimal reaction temperature than OleT (CYP152L1). CYP152K6 was stable up to 50 °C and showed great stability in 3% acetone and dimethylformamide. Stability in solvents helps the enzyme's substrates remain soluble in solution for more efficient catalysis, and heat stability allows enzymes to remain active longer during industrial processes.
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