Heme protein

Heme proteins are a diverse superfamily of proteins containing a heme prosthetic group—a complex of iron embedded in a porphyrin ring—that are essential for numerous biological processes. Prominent heme proteins include hemoglobin and myoglobin (which transport and store oxygen), cytochromes (crucial for electron transfer and cellular respiration), and various enzymes such as catalase and peroxidase that catalyze redox reactions[2][3][6]. The heme group enables these proteins to carry out functions via the iron ion's reversible binding or transfer of electrons and atoms (notably oxygen). Heme proteins’ biological roles are central to processes like oxygen transport, cellular energy production, and metabolic regulation. Dysregulation or mutations in heme proteins can result in diseases including anemia, cardiovascular disease, cancer, and infections. The term "heme protein" does not specify a single molecule but a molecular class characterized by functional diversity and shared structural features[2][6].

Other names

Heme-containing proteinHemoproteinHeme-binding protein

Inhibition of oxygen binding (carbon monoxide, cyanide) Disruption of electron transport (antibiotics/antimalarials) Oxidative stress modulation (antioxidants) Iron chelation (iron chelators) Catalytic site blockade