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MMACHC
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MMACHC
Available structures
PDBOrtholog search: PDBe RCSB
Identifiers
AliasesMMACHC, cblC, methylmalonic aciduria (cobalamin deficiency) cblC type, with homocystinuria, metabolism of cobalamin associated C
External IDsOMIM: 609831; MGI: 1914346; HomoloGene: 12082; GeneCards: MMACHC; OMA:MMACHC - orthologs
Orthologs
SpeciesHumanMouse
Entrez
Ensembl
UniProt
RefSeq (mRNA)

NM_015506
NM_001330540

NM_025962

RefSeq (protein)

NP_001317469
NP_056321

NP_080238

Location (UCSC)Chr 1: 45.5 – 45.51 MbChr 4: 116.56 – 116.57 Mb
PubMed search[3][4]
Wikidata
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Methylmalonic aciduria and homocystinuria type C protein (MMACHC) is a protein that in humans is encoded by the MMACHC gene.[5]

Function

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The C-terminal region of the product of the MMACHC gene is similar to TonB, a bacterial protein involved in energy transduction for cobalamin uptake.[5] The MMACHC gene product catalyzes the decyanation of cyanocobalamin as well as the dealkylation of alkylcobalamins including methylcobalamin and adenosylcobalamin.[6] This function has also been attributed to cobalamin reductases.[7] The MMACHC gene product and cobalamin reductases enable the interconversion of cyano- and alkylcobalamins.[8][9]

Clinical significance

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Mutations are associated with combined homocystinuria and methylmalonic acidemia.[5][10][11][12][13]

References

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Further reading

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