| Synonyms |
anaerobic coproporphyrinogen III oxidase, At5g63290, AtHEMN1, BtrN, Coprogen oxidase, coproporphyrinogen III oxidase, coproporphyrinogen oxidase, coproporphyrinogenase, CPO, HemN, HEMN1, HemW, More, oxidase, coproporphyrinogen, oxygen-independent coproporphyrinogen III oxidase, oxygen-independent coproporphyrinogen-III oxidase, oxygen-independent CPO, radical S-adenosyl-L-methionine dehydrogenase, radical SAM enzyme, Sll1876, Sll1917, viperin |
| Comments |
This enzyme differs from EC 1.3.3.3, coproporphyrinogen oxidase, by using S-adenosyl-L-methionine (AdoMet) instead of oxygen as oxidant. It occurs mainly in bacteria, whereas eukaryotes use the oxygen-dependent oxidase. The reaction starts by using an electron from the reduced form of the enzyme’s [4Fe-4S] cluster to split AdoMet into methionine and the radical 5′-deoxyadenosin-5′-yl. This radical initiates attack on the 2-carboxyethyl groups, leading to their conversion into vinyl groups. This conversion, ¡ª¡¤CH-CH2-COO- ¡ú ¡ªCH=CH2 + CO2 + e? replaces the electron initially used. |
