Aliases for MMACHC Gene
External Ids for MMACHC Gene
Previous GeneCards Identifiers for MMACHC Gene
The exact function of the protein encoded by this gene is not known, however, its C-terminal region shows similarity to TonB, a bacterial protein involved in energy transduction for cobalamin (vitamin B12) uptake. Hence, it is postulated that this protein may have a role in the binding and intracellular trafficking of cobalamin. Mutations in this gene are associated with methylmalonic aciduria and homocystinuria type cblC. [provided by RefSeq, Oct 2009]
GeneCards Summary for MMACHC Gene
MMACHC (Metabolism Of Cobalamin Associated C) is a Protein Coding gene. Diseases associated with MMACHC include Methylmalonic Aciduria And Homocystinuria, Cblc Type and Methylmalonic Acidemia With Homocystinuria. Among its related pathways are Metabolism of water-soluble vitamins and cofactors and Diseases of metabolism. Gene Ontology (GO) annotations related to this gene include cobalamin binding.
UniProtKB/Swiss-Prot Summary for MMACHC Gene
Catalyzes the reductive dealkylation of cyanocobalamin to cob(II)alamin, using FAD or FMN as cofactor and NADPH as cosubstrate (PubMed:19700356, PubMed:21697092, PubMed:22642810). Can also catalyze the glutathione-dependent reductive demethylation of methylcobalamin, and, with much lower efficiency, the glutathione-dependent reductive demethylation of adenosylcobalamin (PubMed:19801555, PubMed:22642810, PubMed:25809485). Under anaerobic conditions cob(I)alamin is the first product; it is highly reactive and is converted to aquocob(II)alamin in the presence of oxygen (PubMed:19801555). Binds cyanocobalamin, adenosylcobalamin, methylcobalamin and other, related vitamin B12 derivatives (PubMed:21071249).