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BCAP31

Chr Xq28

B cell receptor associated protein 31

Aliases:
DXS1357E, BAP31, 6C6-Ag, CDM
MANE:
ENST00000345046.12

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Predicted protein structure

Clinical relevance (Genomics England PanelApp)

Diagnostic Grade (Green)

  • Childhood onset dystonia, chorea or related movement disorder

    X-LINKED: hemizygous mutation in males, biallelic mutations in females
  • DDG2P

    X-LINKED: hemizygous mutation in males, biallelic mutations in females
  • Early onset dystonia

    X-LINKED: hemizygous mutation in males, biallelic mutations in females
  • Fetal anomalies

    X-LINKED: hemizygous mutation in males, biallelic mutations in females
  • Inherited white matter disorders

    X-LINKED: hemizygous mutation in males, biallelic mutations in females
  • Intellectual disability

    X-LINKED: hemizygous mutation in males, biallelic mutations in females
  • White matter disorders and cerebral calcification - narrow panel

    X-LINKED: hemizygous mutation in males, biallelic mutations in females
  • Adult onset dystonia, chorea or related movement disorder

    X-LINKED: hemizygous mutation in males, biallelic mutations in females

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Disease associations (Open Targets)

  • severe motor and intellectual disabilities-sensorineural deafness-dystonia syndrome

    0.75
  • adrenoleukodystrophy

    0.58
  • hereditary disease

    0.52
  • CADDS

    0.46
  • neurodegenerative disease

    0.43
  • X-linked cerebral adrenoleukodystrophy

    0.27
  • hypertensive disorder

    0.15
  • Global developmental delay

    0.12
  • peroxisome biogenesis disorder 2B

    0.12
  • Seizure

    0.12

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

Protein function (UniProt)

B-cell receptor-associated protein 31

Functions as a chaperone protein (PubMed:18287538, PubMed:9396746). Is one of the most abundant endoplasmic reticulum (ER) proteins (PubMed:18287538, PubMed:9396746). Plays a role in the export of secreted proteins in the ER, the recognition of abnormally folded protein and their targeting to the ER associated-degradation (ERAD) (PubMed:18287538, PubMed:9396746). Also serves as a cargo receptor for the export of transmembrane proteins (By similarity). Plays a role in the assembly of the mitochondrial membrane respiratory chain NADH dehydrogenase (Complex I) by stimulating the translocation of NDUFS4 and NDUFB11 from the cytosol to the mitochondria via interaction with TOMM40 (PubMed:31206022). In response to ER stress, delocalizes from the ER-mitochondria contact sites and binds BCL2 (PubMed:31206022). May be involved in CASP8-mediated apoptosis (PubMed:10958671)

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.