iron-containing enzyme

Iron-containing enzymes are a heterogeneous group of metalloenzymes characterized by the presence of iron in their active sites, typically as mononuclear or dinuclear iron ions, within heme groups or iron–sulfur clusters. They play crucial roles in biologically essential processes including oxygen binding and activation, electron transport, cellular respiration, detoxification, biosynthesis, DNA replication, and immune defense. The most prominent families include heme enzymes (such as cytochrome P450, catalases, peroxidases), iron–sulfur cluster proteins (involved in electron transport and metabolic regulation), and non-heme iron enzymes (such as monooxygenases, dioxygenases). Iron-containing enzymes are prevalent therapeutic targets, especially in drug metabolism (via cytochrome P450), anti-infective development, cancer therapy, and management of iron-related disorders. Due to their central metabolic and regulatory roles, safety concerns arise with iron homeostasis disruption, potential generation of toxic ROS, and wide impact across cell physiology. Because "various iron-containing enzymes" is not a specific target but a structural class, more precise identification is required for clinical or research applications.

Other names

iron enzymemetalloenzyme (with iron)iron–sulfur protein (subset)heme enzyme (subset)non-heme iron enzyme (subset)

Generalized mechanisms include enzyme inhibition (competitive and non-competitive), disruption of iron binding or removal of iron cofactor (chelation), alteration of redox state (blocking oxidation or reduction), and antagonism of downstream metabolic effects.