OSCAR

gene
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Summary

OSCAR (osteoclast associated Ig-like receptor, HGNC:29960) is a protein-coding gene on chromosome 19q13.42, encoding Osteoclast-associated immunoglobulin-like receptor (Q8IYS5). Regulator of osteoclastogenesis which plays an important bone-specific function in osteoclast differentiation.

Osteoclasts are multinucleated cells that resorb bone and are essential for bone homeostasis. This gene encodes an osteoclast-associated receptor (OSCAR), which is a member of the leukocyte receptor complex protein family that plays critical roles in the regulation of both innate and adaptive immune responses. The encoded protein may play a role in oxidative stress-mediated atherogenesis as well as monocyte adhesion. Multiple alternatively spliced transcript variants encoding different isoforms have been found for this gene.

Source: NCBI Gene 126014 — RefSeq curated summary.

At a glance

  • GWAS associations: 2
  • Clinical variants (ClinVar): 65 total
  • MANE Select transcript: NM_133169

Identifiers

Gene identifiers

FieldValue
HGNC IDHGNC:29960
Approved symbolOSCAR
Nameosteoclast associated Ig-like receptor
Location19q13.42
Locus typegene with protein product
StatusApproved
Ensembl geneENSG00000170909
Ensembl biotypeprotein_coding
OMIM606862
Entrez126014

Gene structure

Transcript identifiers

Ensembl transcripts: 11 — 11 protein_coding

ENST00000284648, ENST00000351806, ENST00000356532, ENST00000358375, ENST00000359649, ENST00000391760, ENST00000391761, ENST00000611261, ENST00000616215, ENST00000617140, ENST00000956182

RefSeq mRNA: 6 — MANE Select: NM_133169 NM_001282349, NM_001282350, NM_130771, NM_133168, NM_133169, NM_206818

CCDS: CCDS12873, CCDS12874, CCDS12875, CCDS12876, CCDS62789, CCDS74444

Canonical transcript exons

ENST00000358375 — 5 exons

ExonStartEnd
ENSE000011228315409974854099780
ENSE000011228485409686254097164
ENSE000012823635409587254096153
ENSE000018926265410075654100803
ENSE000039371925409466854095357

Expression profiles

Bgee: expression breadth ubiquitous, 132 present calls, max score 96.37.

FANTOM5 (CAGE): breadth broad, TPM avg 6.9612 / max 162.7968, expressed in 567 samples.

FANTOM5 promoters (1 alternative TSS)

Promoter IDTPM avgSamples expressed
1825866.9612567

Top tissues by expression

135 total, by Bgee expression score (0-100, higher = more expressed):

TissueAnatomy IDExpression scoreQuality
monocyteCL:000057696.37gold quality
leukocyteCL:000073896.08gold quality
bloodUBERON:000017895.60gold quality
granulocyteCL:000009495.24gold quality
spleenUBERON:000210684.87gold quality
upper lobe of left lungUBERON:000895284.27gold quality
right lungUBERON:000216783.62gold quality
bone marrowUBERON:000237183.44gold quality
bone marrow cellCL:000209280.40gold quality
primordial germ cell in gonadCL:0000670 ∩ UBERON:000099179.48gold quality
lungUBERON:000204878.27gold quality
vermiform appendixUBERON:000115475.19gold quality
right coronary arteryUBERON:000162570.91gold quality
C1 segment of cervical spinal cordUBERON:000646969.66gold quality
left uterine tubeUBERON:000130368.64gold quality
stromal cell of endometriumCL:000225568.62gold quality
left coronary arteryUBERON:000162668.62gold quality
placentaUBERON:000198767.84gold quality
descending thoracic aortaUBERON:000234567.84gold quality
apex of heartUBERON:000209867.62gold quality
subcutaneous adipose tissueUBERON:000219067.53gold quality
adipose tissueUBERON:000101367.44gold quality
omental fat padUBERON:001041467.36gold quality
gall bladderUBERON:000211067.34gold quality
thoracic aortaUBERON:000151566.69gold quality
ascending aortaUBERON:000149666.50gold quality
substantia nigraUBERON:000203866.04gold quality
smooth muscle tissueUBERON:000113565.69gold quality
left adrenal gland cortexUBERON:003582565.38gold quality
ectocervixUBERON:001224965.00gold quality

Single-cell (SCXA)

Detected in 1 experiment(s), a significant marker in 1.

ExperimentMarker?Max mean expression
E-ANND-3yes3.35

Regulation

Is transcription factor: no

Upstream regulators (CollecTRI, top): ID2, MAFB, MITF, NFATC1, SPI1, USF1

miRNA regulators (miRDB)

22 targeting OSCAR, top 30 by miRDB confidence (max_score; target_count = how many genes the miRNA targets in total — lower means more specific):

miRNAMax scoreAvg scoremiRNA target_count
HSA-MIR-512-3P99.9767.351049
HSA-MIR-497-5P99.9271.832674
HSA-MIR-15A-5P99.9072.802787
HSA-MIR-15B-5P99.9072.782798
HSA-MIR-16-5P99.9072.802780
HSA-MIR-195-5P99.9072.812805
HSA-MIR-6838-5P99.8971.942690
HSA-MIR-424-5P99.8971.902641
HSA-MIR-451B99.5568.281380
HSA-MIR-4797-5P99.3968.011354
HSA-MIR-532-3P99.3465.761195
HSA-MIR-133A-3P99.2771.531270
HSA-MIR-133B99.2771.531270
HSA-MIR-877-3P99.0968.101637
HSA-MIR-570198.9769.541502
HSA-MIR-393898.7266.07834
HSA-MIR-509-3P98.1267.25612
HSA-MIR-6893-3P97.7964.911238
HSA-MIR-370-3P97.0964.921221
HSA-MIR-60097.0766.731259
HSA-MIR-3189-3P96.8066.34896
HSA-MIR-4732-5P90.0764.77412

Literature-anchored findings (GeneRIF, showing 20)

  • hOSCAR thus represents a novel class of molecule expressed by dendritic cells involved in the initiation of the immune response. (PMID:15155468)
  • ligation of OSCAR promotes dendritic cell survival by an ERK- and PI3K-dependent pathway, linked to expression of the Bcl-2 and Bcl-x(L) antiapoptotic molecules (PMID:15650060)
  • Human OSCAR mediates the rescue from apoptosis and the cooperation between dendritic cells and antigen-specific T cells that is prevented by CD85j receptor. (PMID:15905516)
  • Promoter variant in OSCAR gene (OSCAR-2322A>G) might be one of genetic determinants of bone density in postmenopausal women. (PMID:16007331)
  • analysis of a positive feedback circuit of TRANCE-induced activation of NFATc1, involving NFATc1-mediated OSCAR expression and its subsequent activation of NFATc1, necessary for efficient differentiation of osteoclasts (PMID:16109714)
  • OSCAR is a functional receptor on monocytes and neutrophils, involved in the induction of the primary proinflammatory cascade and the initiation of downstream immune responses. (PMID:16493074)
  • OSCAR (osteoclast associated immunoglobulin-like receptor)is expressed by erosion front osteoclasts and by synovial microvessels mononuclear cells. OSCAR is induced in monocytes of rheumatod arthritis patients, facilitating osteoclast differentiation (PMID:18821671)
  • This review discusses the structure-function relationship, expression pattern, and physiological role of OSCAR in osteoimmunology and summarizes its potential implications for human diseases. (PMID:21172874)
  • Data suggest that OSCAR is a collagen receptor that binds to specific collagen motifs and costimulates osteoclastogenesis in DAP12-deficient humans and mice. (PMID:21841309)
  • OSCAR is expressed in vascular endothelial cells and is regulated by oxLDL involving NFATc1 (PMID:22009730)
  • Rotative stress in mouse cells results in increased levels of Oscar transcription. (PMID:22949349)
  • endothelial cell-derived OSCAR was found to be involved in the STAT signaling pathway and to affect monocyte adhesion. (PMID:22985931)
  • Data indicate that osteoclast associated receptor (OSCAR) was strongly expressed by the vasculature of active rheumatoid arthritis (RA) patients. (PMID:23146195)
  • Plasma OSCAR level was higher in the serum of RA patients than controls, and higher in patients with destructive RA rather than non-destructive RA. (PMID:24448348)
  • OSCAR is a receptor for surfactant protein D that activates TNF-alpha release from human CCR2+ inflammatory monocytes. (PMID:25716998)
  • Each domain of OSCAR binds a collagen triple-helical peptide; the primary site is on the C-terminal domain in contrast to GPVI and LAIR-1. (PMID:26552697)
  • OSCAR can play a proinflammatory role in monocyte-derived cells and may contribute crucially on multiple levels to rheumatoid arthritis pathogenesis. (PMID:26786702)
  • regulation of OSCAR by TNF-alpha and receptor activator of NF kappa beta ligand (RANKL) in pre-osteoclasts/osteoclasts (PMID:28555364)
  • Sex-biased ceRNA networks reveal that OSCAR can promote proliferation and migration of lung adenocarcinoma in women. (PMID:32246488)
  • Osteoclast-associated receptor blockade prevents articular cartilage destruction via chondrocyte apoptosis regulation. (PMID:32859940)

Cross-species orthologs

2 orthologs

OrganismSymbolGene ID
mus_musculusOscarENSMUSG00000054594
rattus_norvegicusOscarENSRNOG00000055716

Paralogs (25): GP6 (ENSG00000088053), LILRB1 (ENSG00000104972), LILRA1 (ENSG00000104974), LILRB5 (ENSG00000105609), A1BG (ENSG00000121410), KIR2DL1 (ENSG00000125498), LILRB2 (ENSG00000131042), IGSF1 (ENSG00000147255), LAIR2 (ENSG00000167618), KIR3DL1 (ENSG00000167633), FCAR (ENSG00000186431), LILRB4 (ENSG00000186818), LILRA5 (ENSG00000187116), KIR2DL4 (ENSG00000189013), VSTM1 (ENSG00000189068), NCR1 (ENSG00000189430), LILRB3 (ENSG00000204577), KIR2DS4 (ENSG00000221957), LILRA4 (ENSG00000239961), LILRA2 (ENSG00000239998), KIR3DL2 (ENSG00000240403), KIR3DL3 (ENSG00000242019), KIR2DL3 (ENSG00000243772), LILRA6 (ENSG00000244482), TARM1 (ENSG00000248385)

Protein

Protein identifiers

Osteoclast-associated immunoglobulin-like receptorQ8IYS5 (reviewed: Q8IYS5)

Alternative names: Polymeric immunoglobulin receptor 3

All UniProt accessions (6): Q8IYS5, A0A087WV17, A0A087X1R2, A0A0A0MR14, A0A0A0MRF2, A8MWV3

UniProt curated annotations — full annotation on UniProt →

Function. Regulator of osteoclastogenesis which plays an important bone-specific function in osteoclast differentiation.

Subcellular location. Secreted Cell membrane.

Similarity. Belongs to the leukocyte receptor complex/polymeric immunoglobulin receptor (PIR/LRC) family.

Isoforms (7)

UniProt IDNamesCanonical?
Q8IYS5-11, OSCAR-S1yes
Q8IYS5-22, OSCAR-M1
Q8IYS5-33, OSCAR-M2
Q8IYS5-44, OSCAR-S2
Q8IYS5-55
Q8IYS5-77
Q8IYS5-66, OSCAR-M3

RefSeq proteins (6): NP_001269278, NP_001269279, NP_570127, NP_573398, NP_573399, NP_996554 (=MANE)

Domains & families (InterPro)

IDNameType
IPR003599Ig_subDomain
IPR013783Ig-like_foldHomologous_superfamily
IPR036179Ig-like_dom_sfHomologous_superfamily
IPR050412Ig-like_Receptors_ImmuneRegFamily

Pfam: PF13895

UniProt features (34 total): strand 15, splice variant 4, sequence variant 2, sequence conflict 2, domain 2, glycosylation site 2, signal peptide 1, chain 1, helix 1, turn 1, region of interest 1, compositionally biased region 1, disulfide bond 1

Structure

Experimental structures (PDB)

4 structures.

PDBMethodResolution (Å)
5EIQX-RAY DIFFRACTION2.01
5CJ8X-RAY DIFFRACTION2.02
5CJBX-RAY DIFFRACTION2.4
5EIVX-RAY DIFFRACTION2.41

Predicted structure (AlphaFold)

ModelpLDDTFraction very-high
AF-Q8IYS5-F180.580.58

Functional residue map

Curated UniProt residues grouped by drug-discovery relevance — catalytic, ligand-binding, modification, and mutation-validated positions. Source: UniProtKB sequence features.

Disulfide bonds (1): 53–100

Glycosylation sites (2): 48, 145

Function

Pathways and Gene Ontology

Reactome pathways

2 pathways

IDPathway
R-HSA-198933Immunoregulatory interactions between a Lymphoid and a non-Lymphoid cell
R-HSA-6798695Neutrophil degranulation

MSigDB gene sets: 98 (showing top): GOBP_MYELOID_CELL_DIFFERENTIATION, GSE45365_NK_CELL_VS_CD8_TCELL_UP, RRAGTTGT_UNKNOWN, REACTOME_INNATE_IMMUNE_SYSTEM, REACTOME_ADAPTIVE_IMMUNE_SYSTEM, GOCC_SECRETORY_GRANULE, RACCACAR_AML_Q6, GOBP_MYELOID_LEUKOCYTE_DIFFERENTIATION, HAMAI_APOPTOSIS_VIA_TRAIL_DN, GOBP_OSTEOCLAST_DIFFERENTIATION, TGGAAA_NFAT_Q4_01, GOCC_SECRETORY_VESICLE, GOCC_VESICLE_LUMEN, GOCC_SPECIFIC_GRANULE, GOMF_TRANSMEMBRANE_SIGNALING_RECEPTOR_ACTIVITY

GO Biological Process (6): immune response-regulating signaling pathway (GO:0002764), osteoclast differentiation (GO:0030316), collagen-activated signaling pathway (GO:0038065), Fc-gamma receptor signaling pathway (GO:0038094), positive regulation of bone resorption (GO:0045780), multinuclear osteoclast differentiation (GO:0072674)

GO Molecular Function (1): collagen receptor activity (GO:0038064)

GO Cellular Component (7): extracellular region (GO:0005576), plasma membrane (GO:0005886), specific granule lumen (GO:0035580), extracellular exosome (GO:0070062), tertiary granule lumen (GO:1904724), cell surface (GO:0009986), membrane (GO:0016020)

Reactome top-level categories

Rollup of top-2 pathways:

CategoryPathways
Adaptive Immune System1
Innate Immune System1

GO top-level categories

Rollup of top GO terms by namespace:

CategoryTerms
cellular anatomical structure3
signal transduction1
regulation of immune response1
myeloid leukocyte differentiation1
cell surface receptor signaling pathway1
Fc receptor signaling pathway1
regulation of bone resorption1
bone resorption1
positive regulation of multicellular organismal process1
osteoclast differentiation1
transmembrane signaling receptor activity1
collagen binding1
collagen-activated signaling pathway1
membrane1
cell periphery1
secretory granule lumen1
specific granule1
extracellular vesicle1
intracellular organelle lumen1
tertiary granule1

Protein interactions and networks

STRING

1020 interactions, top by confidence (×1000):

Protein AProtein BPartner UniProtScore
OSCARFCER1GP30273992
OSCARTYROBPO43914978
OSCARDCSTAMPQ9H295815
OSCARTNFSF11O14788807
OSCARNFATC1O95644776
OSCARCTSKP43235772
OSCARACP5P13686769
OSCARCALCRP30988650
OSCAROCSTAMPQ9BR26649
OSCARCSF1P09603615
OSCARATP6V0D2Q8N8Y2602
OSCARCSF1RP07333592
OSCARSIRPB1O00241581
OSCARFOSP01100574
OSCARSFTPDP35247548
OSCARTREM2Q9NZC2548

IntAct

7 interactions, top by confidence:

ABTypeScore
MPIG6BOSCARpsi-mi:“MI:0915”(physical association)0.400
LRRTM2OSCARpsi-mi:“MI:0915”(physical association)0.400
OSCARTARM1psi-mi:“MI:0915”(physical association)0.400
OSCARCOL2A1psi-mi:“MI:0914”(association)0.350
OSCARarsCpsi-mi:“MI:0915”(physical association)0.000
OSCARpsi-mi:“MI:0915”(physical association)0.000

BioGRID (5): COL2A1 (Affinity Capture-MS), TRIP10 (Affinity Capture-MS), OSCAR (Affinity Capture-RNA), OSCAR (Negative Genetic), OSCAR (Negative Genetic)

ESM2 similar proteins: A0A0K2S4Q6, A6NI73, B6A8C7, G1TR84, O43699, O75019, O75022, O75023, O75871, P0C191, P24071, P31994, P40198, P43629, P43630, P59901, P97484, Q08708, Q14943, Q28110, Q496F6, Q6GTX8, Q6ISS4, Q6PI73, Q6UX52, Q863H2, Q8C567, Q8IYS5, Q8K249, Q8MJZ2, Q8MJZ7, Q8N109, Q8N149, Q8N423, Q8N6C8, Q8N743, Q8NHJ6, Q8NHK3, Q8NHL6, Q8VBT3

Diamond homologs: A0A0G2KBC9, A6NI73, C0HJX2, C0HJX3, D3ZQX2, O75019, O75022, O75023, O76036, P0C191, P24071, P43626, P43629, P43630, P59901, P83556, P97484, Q14943, Q14954, Q61450, Q64281, Q6GTX8, Q6ISS4, Q6PI73, Q7TQA1, Q863H2, Q8C567, Q8IYS5, Q8MJZ2, Q8MJZ7, Q8N109, Q8N149, Q8N423, Q8N6C8, Q8N743, Q8NHJ6, Q8NHK3, Q8NHL6, Q95JB9, Q9HCN6

SIGNOR signaling

1 interactions.

AEffectBMechanism
SPI1“up-regulates quantity by expression”OSCAR“transcriptional regulation”

Disease & clinical

Clinical variants and AI predictions

ClinVar

65 variants total. Per-class counts are floors (≥ shown; pagination cap):

ClassificationCount (floor)
Pathogenic0
Likely pathogenic0
Uncertain significance58
Likely benign4
Benign0

Top pathogenic / likely-pathogenic (0)

SpliceAI

533 predictions. Top by Δscore:

VariantEffectΔscore
19:54100754:A:ACdonor_gain1.0000
19:54100755:C:CCdonor_gain1.0000
19:54095866:CCTCA:Cdonor_loss0.9900
19:54095867:CTCA:Cdonor_loss0.9900
19:54095868:TCACC:Tdonor_loss0.9900
19:54095874:T:Adonor_gain0.9900
19:54097008:C:CTacceptor_gain0.9900
19:54097008:C:Tacceptor_gain0.9900
19:54097210:C:Tacceptor_gain0.9900
19:54100755:CAG:Cdonor_gain0.9900
19:54096149:CTCCT:Cacceptor_gain0.9800
19:54096150:TCCT:Tacceptor_gain0.9800
19:54096151:CCTC:Cacceptor_gain0.9800
19:54096152:CT:Cacceptor_gain0.9800
19:54096154:C:CCacceptor_gain0.9800
19:54096154:C:Gacceptor_gain0.9800
19:54097210:C:CTacceptor_gain0.9800
19:54100749:GACT:Gdonor_loss0.9800
19:54100750:ACTCA:Adonor_loss0.9800
19:54100751:CTCA:Cdonor_loss0.9800
19:54100752:TCAC:Tdonor_loss0.9800
19:54100753:CACA:Cdonor_loss0.9800
19:54100755:C:CGdonor_loss0.9800
19:54100755:CA:Cdonor_gain0.9800
19:54100755:CAGA:Cdonor_gain0.9800
19:54100755:CAGAG:Cdonor_gain0.9800
19:54095358:C:CCacceptor_gain0.9700
19:54095365:C:CTacceptor_gain0.9700
19:54095366:G:Tacceptor_gain0.9700
19:54096151:CCT:Cacceptor_gain0.9700

AlphaMissense

1641 scored. Top likely-pathogenic:

VariantProtein changeam_pathogenicity
19:54095982:A:CF182C0.997
19:54096050:G:CF159L0.995
19:54096050:G:TF159L0.995
19:54096052:A:GF159L0.995
19:54095981:G:CF182L0.994
19:54095981:G:TF182L0.994
19:54095982:A:GF182S0.994
19:54095983:A:GF182L0.994
19:54096078:C:GC150S0.994
19:54096079:A:TC150S0.994
19:54095943:C:GC195S0.993
19:54095944:A:TC195S0.993
19:54095950:A:CY193D0.993
19:54097049:A:CF62L0.993
19:54097049:A:TF62L0.993
19:54097051:A:GF62L0.993
19:54097077:C:GC53S0.993
19:54097078:A:TC53S0.993
19:54095942:G:CC195W0.992
19:54095943:C:TC195Y0.992
19:54096943:A:CY98D0.992
19:54097083:A:GL51S0.991
19:54096077:G:CC150W0.990
19:54096980:G:CF85L0.990
19:54096980:G:TF85L0.990
19:54096982:A:GF85L0.990
19:54095944:A:GC195R0.989
19:54096051:A:CF159C0.989
19:54096079:A:GC150R0.989
19:54097050:A:CF62C0.989

dbSNP variants (sampled 300 via entrez): RS1000958527 (19:54096673 C>G,T), RS1000987201 (19:54102419 A>G), RS1001018340 (19:54102644 C>T), RS1002869905 (19:54094716 C>G,T), RS1002919296 (19:54094598 C>G), RS1003035933 (19:54099486 T>C), RS1003403923 (19:54098728 G>A), RS1003875404 (19:54098525 C>T), RS1004437022 (19:54100598 T>A), RS1004477237 (19:54094727 C>G), RS1004773564 (19:54099140 G>A), RS1004820679 (19:54094871 A>G), RS1005029168 (19:54094181 A>C), RS1006927516 (19:54096186 T>C,G), RS1007041322 (19:54102092 C>A,T)

Disease associations

OMIM: gene MIM:606862 | disease phenotypes:

GenCC curated gene-disease

Mondo (0):

Orphanet (0):

HPO phenotypes

0 total (0 of 0 shown, HPO-id order):

GWAS associations

2 associations (top):

StudyTraitp-value
GCST001692_13Response to taxane treatment (docetaxel)9.000000e-06
GCST006585_2578Blood protein levels1.000000e-08

Drugs & pharmacology

Drug and pharmacology data

Is drug target: no

PharmGKB: 1 entry (VIP=true, CPIC=false)

CTD chemical–gene interactions

37 total (human), top 30 by PubMed support.

ChemicalActions (top 5)PubMed papers
Benzo(a)pyreneaffects methylation, decreases expression, increases methylation3
sodium arseniteincreases expression, affects acetylation, affects methylation2
Air Pollutantsaffects expression, increases abundance, increases expression2
Nickelincreases expression2
triphenyl phosphateaffects expression1
propionaldehydeincreases expression1
pirinixic acidaffects binding, decreases expression, increases activity1
bisphenol Aaffects expression1
tris(2-butoxyethyl) phosphateaffects expression1
beta-lapachoneincreases expression1
o,p’-DDTincreases expression1
tris(1,3-dichloro-2-propyl)phosphateincreases expression1
butyraldehydeincreases expression1
perfluorooctanoic acidincreases expression1
tobacco tardecreases reaction, increases expression1
diallyl disulfidedecreases reaction, increases expression1
allyl sulfidedecreases reaction, increases expression1
CGP 52608affects binding, increases reaction1
monomethylarsonous acidaffects acetylation, affects methylation1
NSC 689534affects binding, increases expression1
Arsenic Trioxidedecreases expression1
Cisplatinincreases expression1
Copperaffects binding, increases expression1
Estradiolaffects cotreatment, increases expression1
Folic Aciddecreases expression1
Formaldehydedecreases expression1
Lipopolysaccharidesaffects cotreatment, increases expression1
Niclosamidedecreases reaction, increases expression1
Ozoneaffects expression, increases abundance1
Rotenonedecreases reaction, increases expression1

Clinical trials (associated diseases)

0 trials via MONDO — disease-level, not drug-specific.

No linked Atlas pages yet — the cross-entity mesh grows as the corpus expands.