Table 4 Redox states of metals with metallo-enzymes and their specific catalytic functions
From: Metal(loid) speciation and transformation by aerobic methanotrophs
Metal | Redox state | Enzymes | Class of catalysis by enzyme |
|---|---|---|---|
Copper | Cu (II), Cu (I) | Most copper-containing enzymes (e.g. Cytochromes) | Electron transfer, ferrous oxidase, amine oxidase |
Iron | Fe (II), Fe (III), Fe (IV), Fe (V) | Cytochromes Peroxidase, catalase | Electron transfer, Oxidation |
Molybdenum | Mo (III) to Mo (VI) | Nitrogenase, Aldehyde oxidase | Oxidation |
Cobalt | Co (I)?, Co (II), Co (III) | B12- requiring enzymes | Carbonic anhydrase |
Manganese | Mn (III) to Mn (IV)? | Photosynthetic enzymes | Superoxide dismutase, oxidase |
Chromium | Cr (VI) to Cr (III) | Dehydrogenase | Oxidoreductases |