Pathogen flavoenzyme (PFE)

Pathogen flavoenzymes are a diverse class of proteins that utilize flavin adenine dinucleotide (FAD) or flavin mononucleotide (FMN) as essential cofactors to catalyze a wide range of redox reactions. These enzymes are critical for the survival, virulence, and metabolic adaptation of various bacteria, fungi, and protozoan parasites, often participating in the electron transport chain, DNA repair, and the maintenance of redox homeostasis. Because many pathogen flavoenzymes possess structural and mechanistic features distinct from their human counterparts, they are highly attractive targets for the development of selective antimicrobial and antiparasitic agents. Drugs targeting these enzymes typically function either by direct inhibition of the catalytic site, such as Plasmodium falciparum dihydroorotate dehydrogenase inhibitors for malaria, or by acting as prodrugs that are activated by the flavoenzyme into toxic intermediates, as seen with nitrofurans and nitroimidazoles. The therapeutic potential of this class is underscored by its involvement in essential pathways that, when disrupted, lead to pathogen death or increased susceptibility to host immune responses.

Other names

Flavin-dependent enzymeFlavoproteinFMN-dependent enzymeFAD-dependent enzymeMicrobial flavoenzyme

Inhibition of essential metabolic redox reactions or prodrug activation via enzymatic reduction to generate reactive cytotoxic species.