VpStyA1/VpStyA2B of Variovorax paradoxus EPS: An Aryl Alkyl Sulfoxidase Rather than a Styrene Epoxidizing Monooxygenase.

Herein we describe the first representative of an E2-type two-component styrene monooxygenase of proteobacteria. It comprises a single epoxidase protein (StyA1) and a two domain protein (StyA2B) harboring an epoxidase (A2) and a FAD-reductase (B) domain. It was annotated as StyA1/StyA2B of EPS.