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Iron-binding proteins
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<p>Iron-binding proteins are <a href="/facts/Carrier_protein/h1aczVxg">carrier proteins</a> and <a href="/facts/Metalloprotein/c0cXhyG4">metalloproteins</a> that are important in iron <a href="/facts/Metabolism/WxDrm8k5">metabolism</a> and the immune response. Iron is required for life. </p><p>Iron-dependent enzymes catalyze a variety of biochemical reactions and can be divided into three broad classes depending on the structure of their active site: non-heme mono-iron, non-heme diiron , or heme centers. A well-known family of iron-dependent enzymes include oxygenases that facilitate hydroxyl group addition of one or both atoms from o2. Notable enzymes include tryptophan dioxygenase, ferredoxin, and 2-oxoglutarate dioxygenase. </p>