Purification, characterization and crystallization of enzymes for dibenzothiophene desulfurization

Abstract

DszC and DszA, DBT monooxygenase and DBT sulfone monooxygenase, respectively, involved in dibenzothiophene (DBT) desulfurization, were purified to homogeneity from Rhodococcus erythropolis D-1. The two enzymes were crystallized and enzymologically characterized. We found a high activity of flavin reductase in the non-DBT-desulfurizing bacterium, Paenibacillus polymyxa A-1, which is essential for DszC and A activities, and purified to homogeneity and characterized the enzyme.