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MMADHC

Chr 2q23.2

metabolism of cobalamin associated D

Aliases:
CL25022, cblD
MANE:
ENST00000303319.10

Annotations refreshed 9 hours ago.

Predicted protein structure

Clinical relevance (Genomics England PanelApp)

Diagnostic Grade (Green)

  • DDG2P

    BIALLELIC, autosomal or pseudoautosomal
  • Early onset or syndromic epilepsy

    BIALLELIC, autosomal or pseudoautosomal
  • Fetal anomalies

    BIALLELIC, autosomal or pseudoautosomal
  • Intellectual disability

    BIALLELIC, autosomal or pseudoautosomal
  • Likely inborn error of metabolism

    BIALLELIC, autosomal or pseudoautosomal
  • Undiagnosed metabolic disorders

    BIALLELIC, autosomal or pseudoautosomal
  • Adult onset dystonia, chorea or related movement disorder

  • Adult onset neurodegenerative disorder

    Unknown

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Disease associations (Open Targets)

  • methylmalonic aciduria and homocystinuria type cblD

    0.81
  • Methylmalonic acidemia with homocystinuria, type cblD

    0.79
  • Methylmalonic acidemia with homocystinuria

    0.78
  • homocystinuria without methylmalonic aciduria

    0.60
  • methylmalonic aciduria and/or homocystinuria, cblD type

    0.60
  • Methylmalonic acidemia with homocystinuria, type cblC

    0.50
  • methylmalonic aciduria and homocystinuria type cblC

    0.50
  • homocystinuria-megaloblastic anemia cblD type

    0.45
  • isolated methylmalonic aciduria cblD type

    0.45
  • inborn disorder of cobalamin metabolism and transport

    0.37

Score is the Open Targets composite evidence score (0-1). Higher = stronger gene-disease association.

Protein function (UniProt)

Cobalamin trafficking protein CblD

Involved in cobalamin metabolism and trafficking (PubMed:18385497, PubMed:23415655, PubMed:24722857, PubMed:26364851). Plays a role in regulating the biosynthesis and the proportion of two coenzymes, methylcob(III)alamin (MeCbl) and 5'-deoxyadenosylcobalamin (AdoCbl) (PubMed:18385497, PubMed:23415655, PubMed:24722857). Promotes oxidation of cob(II)alamin bound to MMACHC (PubMed:26364851). The processing of cobalamin in the cytosol occurs in a multiprotein complex composed of at least MMACHC, MMADHC, MTRR (methionine synthase reductase) and MTR (methionine synthase) which may contribute to shuttle safely and efficiently cobalamin towards MTR in order to produce methionine (PubMed:27771510)

Data sources: HGNC (CC BY 4.0), AlphaFold (CC BY 4.0, Jumper et al. Nature 2021), Genomics England PanelApp (CC BY 4.0), ClinGen, Open Targets (CC0), UniProt.

Not for sole clinical decision-making. Always verify against primary sources.