Fungal oxidative and peroxidative enzymes

Fungal oxidative and peroxidative enzymes are a diverse group of oxidoreductases, including lignin peroxidases, manganese peroxidases, and catalases, that facilitate the transfer of electrons to oxygen or peroxides. In ecological systems, these enzymes are primarily recognized for their ability to degrade complex polymers such as lignin, making them essential for wood decay and bioremediation. Within the context of human health, these enzymes serve as critical components of the fungal antioxidant defense system, allowing pathogens such as Aspergillus and Candida to neutralize the oxidative burst of host immune cells, specifically reactive oxygen species like hydrogen peroxide. In pharmacology, these enzymes are considered significant therapeutic targets or modulators of drug efficacy; established antifungal agents like amphotericin B and azoles exert their effects, in part, by inducing oxidative stress that overwhelms these defense systems. Targeting these enzymes offers a strategy to chemosensitize fungi to existing treatments and attenuate their virulence, although development must account for the high degree of redundancy in fungal antioxidant pathways and potential cross-reactivity with human enzymes.

Other names

Fungal peroxidasesFungal oxidoreductasesFungal antioxidant enzymesLigninolytic enzymesFungal oxidative stress response enzymes

Induction of lethal levels of intracellular reactive oxygen species (ROS) and inhibition of enzymatic scavenging systems (e.g., peroxidases and catalases) to disrupt fungal redox homeostasis and promote cell death.