Rieske Oxygenases and Other Ferredoxin-Dependent Enzymes: Electron Transfer Principles and Catalytic Capabilities

Enzymes that depend on sophisticated electron transfer via ferredoxins (Fds) exhibit outstanding catalytic capabilities, but despite decades of research, many of them are still not well understood or exploited for synthetic applications. This review aims to provide a general overview of the most important Fd-dependent enzymes and the electron transfer processes involved. While several examples are discussed, we focus in particular on the family of Rieske non-heme iron-dependent oxygenases (ROs). In addition to illustrating their electron transfer principles and catalytic potential, the current state of knowledge on structure-function relationships and the mode of interaction between the redox partner proteins is reviewed. Moreover, we highlight several key catalyzed transformations, but also take a deeper dive into their engineerability for biocatalytic applications. The overall findings from these case studies highlight the catalytic capabilities of these biocatalysts and could stimulate future interest in developing additional Fd-dependent enzyme classes for synthetic applications.

Automated summary

This review provides a general overview of enzymes that rely on sophisticated electron transfer via ferredoxins (Fds) for catalytic capabilities, with a focus on the Rieske non-heme iron-dependent oxygenases (ROs) family. It discusses the electron transfer principles, catalytic potential, structure-function relationships, and the mode of interaction between redox partner proteins. The review also highlights key catalyzed transformations and explores the engineerability of these enzymes for biocatalytic applications, aiming to stimulate future interest in developing additional Fd-dependent enzyme classes for synthetic applications.