A hemoprotein (also haemoprotein), or heme protein, is a metalloprotein containing a heme prosthetic group, either covalently or noncovalently bound to the protein itself. The iron in the heme is capable of undergoing oxidation and reduction (usually to +2 and +3, though stabilized ferryl [Fe⁺⁴] compounds are well known in the peroxidases).

Roles

Hemoproteins have diverse biological functions including:

• oxygen transport
  • hemoglobin
  • hemocyanin
  • myoglobin
  • neuroglobin
  • cytoglobin
  • leghemoglobin
• catalysis
  • peroxidases
  • cytochrome c oxidase
  • ligninases
• active membrane transport
  • cytochromes
• electron transfer
  • cytochrome c
  • catalase
• Sensory
  • FixL (Oxygen sensor)
  • sGC (Nitric Oxide sensor)
  • CooA (CO sensor)

External links

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