Skip to content
GenoLensGenoLens

BCKDHB

Chr 6q14.1

branched chain keto acid dehydrogenase E1 subunit beta

Aliases:
OVD1B
MANE:
ENST00000320393.9

Annotations refreshed 10 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
  • Hereditary neuropathy

    BIALLELIC, autosomal or pseudoautosomal
  • Hereditary neuropathy or pain disorder

    BIALLELIC, autosomal or pseudoautosomal
  • Hyperammonaemia

    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

+2 more panels — install the extension to see the full list inline on any page.

Disease associations (Open Targets)

  • maple syrup urine disease type 1B

    0.79
  • maple syrup urine disease

    0.77
  • maple syrup urine disease type 1A

    0.71
  • hereditary disease

    0.49
  • Abnormality of the skeletal system

    0.40
  • intermediate maple syrup urine disease

    0.37
  • intermittent maple syrup urine disease

    0.37
  • classic maple syrup urine disease

    0.37
  • Abnormality of metabolism/homeostasis

    0.34
  • placenta praevia

    0.31

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

Protein function (UniProt)

2-oxoisovalerate dehydrogenase subunit beta, mitochondrial

Together with BCKDHA forms the heterotetrameric E1 subunit of the mitochondrial branched-chain alpha-ketoacid dehydrogenase (BCKD) complex. The BCKD complex catalyzes the multi-step oxidative decarboxylation of alpha-ketoacids derived from the branched-chain amino-acids valine, leucine and isoleucine producing CO2 and acyl-CoA which is subsequently utilized to produce energy. The E1 subunit catalyzes the first step with the decarboxylation of the alpha-ketoacid forming an enzyme-product intermediate. A reductive acylation mediated by the lipoylamide cofactor of E2 extracts the acyl group from the E1 active site for the next step of the reaction

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.