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Details on Person UniProt:P51572-2 BCAP31

Class:IdReferenceIsoform:8965079
_chainChangeLoginitiator methionine:1 added on Fri February 17 2017;chain:2-246 added on Fri February 17 2017;initiator methionine:1 for 8965079 removed on Fri Nov 03 2023;initiator methionine: for 8965079 added on Fri Nov 03 2023;initiator methionine: for 8965079 removed on Fri Aug 15 2025;initiator methionine:1 for 8965079 added on Fri Aug 15 2025
_displayNameUniProt:P51572-2 BCAP31
_timestamp2025-08-15 21:51:20
chaininitiator methionine:1
chain:2-246
checksumD34367F870D6EB00
commentFUNCTION 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).SUBUNIT Homodimer and heterodimer with BCAP29 (PubMed:23967155, PubMed:9334338). Binds CASP8 (isoform 9) as a complex containing BCAP31, BCAP29, BCL2 and/or BCL2L1 (PubMed:11917123, PubMed:31206022, PubMed:9334338). Forms a complex (via C-terminus) with TOMM40 which mediates the translocation of components of the mitochondrial membrane respiratory chain NADH dehydrogenase (Complex I) from the cytosol to the mitochondria; within the complex BCAP31 interacts directly with unprocessed and processed NDUFS4 and NDUFB11 (PubMed:31206022). Interacts with VDAC1 (PubMed:31206022). Interacts with VAMP3, VAMP1 and membrane IgD immunoglobulins (By similarity). Interacts with HACD2 (PubMed:15024066). Interacts with DNM1L; may form part of a larger protein complex at the endoplasmic reticulum-mitochondrial interface during mitochondrial fission (PubMed:24196833).SUBUNIT (Microbial infection) Interacts (via C-terminus) with HRSV membrane protein SH; this interaction is direct.INTERACTION May shuttle between the ER and the intermediate compartment/cis-Golgi complex (PubMed:9396746). Associates with the mitochondria-associated endoplasmic reticulum membrane via interaction with TOMM40 (PubMed:31206022).SUBCELLULAR LOCATION (Microbial infection) Upon SV40 infection, colocalizes with DNAJC18, DNAJB12 and DNAJB14 in punctate structures within the endoplasmic reticulum membrane.ALTERNATIVE PRODUCTS Ubiquitous. Highly expressed in neurons and discrete endocrine cells.PTM Cleaved by CASP8 and other caspases.DISEASE The disease is caused by variants affecting the gene represented in this entry.DISEASE BCAP31 is deleted in the chromosome Xq28 deletion syndrome which involves BCAP31 and the and the promoter region of ABCD1.SIMILARITY Belongs to the BCAP29/BCAP31 family.
created[InstanceEdit:8964659] Weiser, JD
descriptionrecommendedName: B-cell receptor-associated protein 31 shortName: BCR-associated protein 31 shortName: Bap31 alternativeName: 6C6-AG tumor-associated antigen alternativeName: Protein CDM alternativeName: p28
geneNameBCAP31
BAP31
DXS1357E
identifierP51572
isoformParent
isSequenceChangedFALSE
keyword3D-structure
Alternative splicing
Apoptosis
Coiled coil
Deafness
Direct protein sequencing
Dystonia
Endoplasmic reticulum
ER-Golgi transport
Host-virus interaction
Intellectual disability
Membrane
Protein transport
Proteomics identification
Reference proteome
Transmembrane
Transmembrane helix
Transport
modified[InstanceEdit:9836292] Weiser, Joel, 2023-05-25
[InstanceEdit:9852000] Weiser, Joel, 2023-11-03
[InstanceEdit:9917590] Weiser, Joel, 2024-08-09
[InstanceEdit:9926675] Weiser, Joel, 2024-11-03
[InstanceEdit:9963647] Weiser, Joel, 2025-08-15
nameBCAP31
referenceDatabase[ReferenceDatabase:2] UniProt
referenceGene[ReferenceDNASequence:8991732] ENSEMBL:ENSG00000185825 BCAP31 [Homo sapiens]
secondaryIdentifierBAP31_HUMAN
B3KQ79
D3DWV5
Q13836
Q96CF0
sequenceLength246
species[Species:48887] Homo sapiens
variantIdentifierP51572-2
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