Hemeprotein

Hemeproteins are a diverse class of proteins containing a heme prosthetic group, which consists of an iron atom coordinated within a porphyrin ring. This group includes hemoglobin, responsible for oxygen transport in the blood, and various enzymes such as cytochromes, catalases, and peroxidases that facilitate critical redox reactions and electron transfer. In therapeutic contexts, hemoglobin is a primary target for treating hemoglobinopathies like sickle cell disease, where drugs like voxelotor increase oxygen affinity and hydroxyurea induces fetal hemoglobin production. Heme metabolism is also a key therapeutic vulnerability in malaria, where drugs like chloroquine and artemisinin interfere with the detoxification of heme released during hemoglobin digestion by the parasite. Additionally, heme-containing enzymes like soluble guanylate cyclase are targeted for cardiovascular conditions, while the cytochrome P450 family is central to drug metabolism and a major source of drug-drug interactions. The iron center within the heme allows these proteins to bind gaseous ligands such as oxygen, carbon monoxide, and nitric oxide, making them essential for physiological gas sensing and signaling.

Other names

Heme-containing proteinHemoproteinHemoglobin and heme-containing enzymes

Modulation of oxygen affinity, inhibition of heme detoxification, activation of soluble guanylate cyclase, induction of fetal hemoglobin, and inhibition of mitochondrial respiration.