BCAS1
Breast carcinoma-amplified sequence 1
Also known as: AIBC1, BCAS1_HUMAN, NABC1, PMES-2
Cross-references: UniProt · Ensembl · Human Protein Atlas · GeneCards · NCBI Gene
Protein identityUniProt · HPA
- UniProt accession
- O75363
- Gene
- BCAS1
- Ensembl
- ENSG00000064787
- Chromosome
- 20
- Canonical length
- 584 aa
- Protein class
- Predicted intracellular proteins
- Subcellular location
- Vesicles
- Quaternary structure
- Homodimer
OverviewNCBI Gene
This gene resides in a region at 20q13 which is amplified in a variety of tumor types and associated with more aggressive tumor phenotypes. Among the genes identified from this region, it was found to be highly expressed in three amplified breast cancer cell lines and in one breast tumor without amplification at 20q13.2. However, this gene is not in the common region of maximal amplification and its expression was not detected in the breast cancer cell line MCF7, in which this region is highly amplified. Although not consistently expressed, this gene is a candidate oncogene. [provided by RefSeq, Apr 2016]
Canonical amino-acid sequenceUniProt
584 residues, UniProt reviewed canonical sequence.
>O75363|BCAS1
1 MGNQMSVPQR VEDQENEPEA ETYQDNASAL NGVPVVVSTH TVQHLEEVDL GISVKTDNVA
61 TSSPETTEIS AVADANGKNL GKEAKPEAPA AKSRFFLMLS RPVPGRTGDQ AADSSLGSVK
121 LDVSSNKAPA NKDPSESWTL PVAAGPGQDT DKTPGHAPAQ DKVLSAARDP TLLPPETGGA
181 GGEAPSKPKD SSFFDKFFKL DKGQEKVPGD SQQEAKRAEH QDKVDEVPGL SGQSDDVPAG
241 KDIVDGKEKE GQELGTADCS VPGDPEGLET AKDDSQAAAI AENNNSIMSF FKTLVSPNKA
301 ETKKDPEDTG AEKSPTTSAD LKSDKANFTS QETQGAGKNS KGCNPSGHTQ SVTTPEPAKE
361 GTKEKSGPTS LPLGKLFWKK SVKEDSVPTG AEENVVCESP VEIIKSKEVE SALQTVDLNE
421 GDAAPEPTEA KLKREESKPR TSLMAFLRQM SVKGDGGITH SEEINGKDSS CQTSDSTEKT
481 ITPPEPEPTG APQKGKEGSS KDKKSAAEMN KQKSNKQEAK EPAQCTEQAT VDTNSLQNGD
541 KLQKRPEKRQ QSLGGFFKGL GPKRMLDAQV QTDPVSIGPV GKSKLocalizationUniProt · AlphaFold · HPA
Whether an antibody against BCAS1 can act on the native protein depends on physical access: surface and secreted proteins are reachable by circulating antibodies, intracellular proteins usually are not.
- Antibody reachability
- Intracellular
- Secreted
- No
- Transmembrane segments
- 0
- Mean surface accessibility (rSASA)
- 0.72
- Highest tissue expression
- 202 nTPM
Expression across tissuesHPA
Tissue
- spinal cord: 202 nTPM
- stomach: 151 nTPM
- midbrain: 119 nTPM
- choroid plexus: 83 nTPM
- cerebral cortex: 81 nTPM
- basal ganglia: 80 nTPM
Single-cell type
- oligodendrocytes: 1,972 nCPM
- goblet cells: 1,263 nCPM
- foveolar cells: 1,033 nCPM
- oligodendrocyte progenitor cells: 741 nCPM
- prostatic glandular cells: 348 nCPM
- prostatic club cells: 347 nCPM
Immune cell
- T-reg: 2.7 nTPM
- MAIT T-cell: 1.5 nTPM
- memory B-cell: 0.7 nTPM
- memory CD4 T-cell: 0.4 nTPM
- neutrophil: 0.4 nTPM
- basophil: 0.3 nTPM
Brain region
- medulla oblongata: 1,286 nTPM
- white matter: 1,191 nTPM
- midbrain: 1,019 nTPM
- pons: 999 nTPM
- basal ganglia: 920 nTPM
- spinal cord: 838 nTPM
Genetic constraint and essentialitygnomAD · DepMap
Does the body need this protein intact? Low LOEUF or a strong DepMap dependency means loss or blockade of the protein is likely to be felt.
- gnomAD LOEUF (loss-of-function intolerance)
- 0.86
- gnomAD pLI
- 0
- gnomAD missense Z
- -0.25
- DepMap mean gene effect
- 0.01
- DepMap dependency class
- selective
Cancer expressionTCGA
Across TCGA tumor cohorts, this protein is over-expressed in roughly 4% of surveyed tumor types (aggregate summary; per-cohort expression, alteration, and survival load in the interactive view).
OntologyGO
Biological processes
Cellular components
Protein domainsUniProt · Pfam · InterPro
- Novel Amplified in Breast Cancer-1
KeywordsUniProt
InteractionsUniProt · HPA
Protein binding partners of BCAS1 in the human serome: UniProt-annotated complex subunits plus reported interactors. Each links to its own Seroatlas record.
Antibody and autoantibody relevanceSeroatlas analysis
Seroatlas reads BCAS1 as an antibody target. Whether an autoantibody or antibody against BCAS1 could matter depends on whether native BCAS1 is physically reachable, whether the body needs it intact, and whether it acts in a disease-relevant tissue.
BCAS1 is annotated as predominantly intracellular. Intracellular proteins are common autoantibody markers, becoming visible to the immune system after cell injury or altered processing, but are usually markers of disease rather than direct drivers.
Annotation status
The present source text does not explicitly label BCAS1 as an autoantigen. Seroatlas presents hypothesis context only and does not manufacture a known-serology claim.
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