Cyanocobalamin Reductase / Alkylcobalamin Dealkylase

**Semantic type:** Amino Acid, Peptide, or Protein|Enzyme

**Definition:** Cyanocobalamin reductase / alkylcobalamin dealkylase (282 aa, ~32 kDa) is encoded by the human MMACHC gene. This protein is involved in cobalamin transport and the decyanation of cyanocob(III)alamin (cyanocobalamin, CNCbl) to yield cob(II)alamin and cyanide and the dealkylation of alkylcob(III)alamins using a thiolate of glutathione to generate cob(I)alamin and the corresponding glutathione thioether.

**Synonyms:** - Alkylcobalamin:Glutathione S-Alkyltransferase - CblC - Cyanocobalamin Reductase (Cyanide-Eliminating) - EC 1.16.1.6 - EC 2.5.1.15 - MMACHC - Methylmalonic Aciduria and Homocystinuria Type C Protein