CEACAM8

gene
On this page

Also known as CD66b

Summary

CEACAM8 (CEA cell adhesion molecule 8, HGNC:1820) is a protein-coding gene on chromosome 19q13.2, encoding Cell adhesion molecule CEACAM8 (P31997). Cell surface glycoprotein that plays a role in cell adhesion in a calcium-independent manner.

Enables protein heterodimerization activity. Involved in heterophilic cell-cell adhesion via plasma membrane cell adhesion molecules. Located in cell surface and extracellular space. Biomarker of severe acute respiratory syndrome.

Source: NCBI Gene 1088 — RefSeq curated summary.

At a glance

  • Clinical variants (ClinVar): 63 total
  • MANE Select transcript: NM_001816

Identifiers

Gene identifiers

FieldValue
HGNC IDHGNC:1820
Approved symbolCEACAM8
NameCEA cell adhesion molecule 8
Location19q13.2
Locus typegene with protein product
StatusApproved
AliasesCD66b
Ensembl geneENSG00000124469
Ensembl biotypeprotein_coding
OMIM615747
Entrez1088

Gene structure

Transcript identifiers

Ensembl transcripts: 4 — 4 protein_coding

ENST00000244336, ENST00000599005, ENST00000899996, ENST00000899997

RefSeq mRNA: 1 — MANE Select: NM_001816 NM_001816

CCDS: CCDS12610

Canonical transcript exons

ENST00000244336 — 6 exons

ExonStartEnd
ENSE000014150454258320642583337
ENSE000015102724258024342581353
ENSE000024305274258878442589038
ENSE000025032604258945742589735
ENSE000025164314259476542594924
ENSE000025301034259354142593900

Expression profiles

Bgee: expression breadth ubiquitous, 116 present calls, max score 99.49.

FANTOM5 (CAGE): breadth tissue_specific, TPM avg 0.5140 / max 278.8940, expressed in 43 samples.

FANTOM5 promoters (3 alternative TSS)

Promoter IDTPM avgSamples expressed
1812020.289825
1812030.221031
1812040.00321

Top tissues by expression

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

TissueAnatomy IDExpression scoreQuality
trabecular bone tissueUBERON:000248399.49gold quality
bone marrowUBERON:000237198.47gold quality
bone marrow cellCL:000209297.66gold quality
male germ line stem cell (sensu Vertebrata) in testisCL:0000089 ∩ UBERON:000047377.86gold quality
mononuclear cellCL:000084277.68gold quality
monocyteCL:000057677.51gold quality
leukocyteCL:000073876.84gold quality
bloodUBERON:000017875.27gold quality
granulocyteCL:000009465.44gold quality
spleenUBERON:000210664.45gold quality
mucosa of transverse colonUBERON:000499161.18gold quality
right lungUBERON:000216761.03gold quality
adrenal tissueUBERON:001830355.06gold quality
upper lobe of left lungUBERON:000895250.95gold quality
upper lobe of lungUBERON:000894850.61gold quality
frontal poleUBERON:000279550.41gold quality
lungUBERON:000204850.33gold quality
middle frontal gyrusUBERON:000270250.30gold quality
sural nerveUBERON:001548850.24silver quality
paraflocculusUBERON:000535150.18gold quality
Brodmann (1909) area 10UBERON:001354150.18gold quality
thymusUBERON:000237049.99silver quality
quadriceps femorisUBERON:000137749.90gold quality
vastus lateralisUBERON:000137949.45gold quality
Brodmann (1909) area 46UBERON:000648349.30gold quality
blood vessel layerUBERON:000479749.29gold quality
cerebellar vermisUBERON:000472049.25gold quality
cervix squamous epitheliumUBERON:000692249.20gold quality
hair follicleUBERON:000207349.18gold quality
olfactory bulbUBERON:000226448.92gold quality

Single-cell (SCXA)

Detected in 2 experiment(s), a significant marker in 2.

ExperimentMarker?Max mean expression
E-MTAB-9801yes3189.16
E-ANND-3yes12.17

Regulation

Is transcription factor: no

miRNA regulators (miRDB)

71 targeting CEACAM8, 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-3613-3P100.0076.367965
HSA-MIR-4795-3P100.0074.624024
HSA-MIR-340-5P100.0072.504437
HSA-MIR-371B-5P99.9975.344759
HSA-MIR-548C-3P99.9974.017587
HSA-MIR-318599.9968.121959
HSA-MIR-373-5P99.9875.364753
HSA-MIR-616-5P99.9875.584775
HSA-MIR-19A-3P99.9875.332762
HSA-MIR-19B-3P99.9875.442754
HSA-MIR-60799.9773.625593
HSA-MIR-548AT-5P99.9670.832666
HSA-MIR-548AJ-3P99.9673.385345
HSA-MIR-548X-3P99.9673.385345
HSA-MIR-548AB99.9571.313488
HSA-MIR-55999.9572.283609
HSA-MIR-548A-5P99.9471.273482
HSA-MIR-548AD-5P99.9471.233502
HSA-MIR-548AE-5P99.9471.233502
HSA-MIR-548AK99.9471.243488
HSA-MIR-548AM-5P99.9471.243488
HSA-MIR-548AP-5P99.9471.143489
HSA-MIR-548AQ-5P99.9471.343426
HSA-MIR-548AR-5P99.9471.283515
HSA-MIR-548AS-5P99.9471.223482
HSA-MIR-548AU-5P99.9471.243488
HSA-MIR-548AY-5P99.9471.233502
HSA-MIR-548B-5P99.9471.233502
HSA-MIR-548BB-5P99.9471.273509
HSA-MIR-548C-5P99.9471.243488

Literature-anchored findings (GeneRIF, showing 13)

  • All the leukemic samples showed overexpression of CEACAM6 and 8 when compared with normal granulocytes. (PMID:17909799)
  • CD66b molecules are involved in regulating adhesion and activation of eosinophils, possibly through their localization in lipid rafts and interaction with other cell surface molecules, such as CD11b. (PMID:18056392)
  • Data show that desensitization of neutrophils to any two CEACAMs, 1, 3, 6, or 8, results in selective desensitization to those two CEACAMs, while the cells remain responsive to the other two neutrophil CEACAMs. (PMID:19077207)
  • The highly elevated gene expression of CEACAM6 and CEACAM8 in primary myelofibrosis can serve as molecular markers of myelofibrotic transformation. (PMID:21470677)
  • Granulocytes from type 2 diabetes patients display higher granulocyte cell surface expression of CD66b compared with values of healthy controls. (PMID:23686079)
  • CEACAM8 interacts with CEACAM1 inhibiting TLR2-triggered immune responses (PMID:24743304)
  • Inhibition of C5aR1 leads to a significant reduction of CD66b and CD11b expression indicating a lower neutrophil activation status and block of granule exocytosis. (PMID:26176669)
  • Data suggest ways in which carcinoembryonic antigen-related cell adhesion molecules CEACAM6 and CEACAM8 regulate the biological functions of one another. (PMID:26483485)
  • a 7-gene signature was identified which correctly predicted the primary prefibrotic myelofibrosis group with a sensitivity of 100% and a specificity of 89%. The 7 genes included MPO, CEACAM8, CRISP3, MS4A3, CEACAM6, HEMGN, and MMP8 (PMID:27579896)
  • Increased CD66b positive tumor-infiltrating neutrophils (CD66b + TINs) was significantly associated with presence of metastasis, S stage, and nonseminomatous germ cell tumor diagnosis. (PMID:27863478)
  • High CEACAM8 expression is associated with metastases in breast carcinoma. (PMID:31222613)
  • CD66b(+) monocytes represent a proinflammatory myeloid subpopulation in cancer. (PMID:32632664)
  • Clinical Significance of CD66b Expression in Non-Small Cell Lung Cancer. (PMID:37162631)

Cross-species orthologs

0 orthologs

Paralogs (24): CEACAM21 (ENSG00000007129), CEACAM7 (ENSG00000007306), CEACAM1 (ENSG00000079385), CEACAM6 (ENSG00000086548), CEACAM4 (ENSG00000105352), CEACAM5 (ENSG00000105388), PSG8 (ENSG00000124467), HEPACAM (ENSG00000165478), PSG6 (ENSG00000170848), CEACAM3 (ENSG00000170956), PSG9 (ENSG00000183668), CEACAM19 (ENSG00000186567), HEPACAM2 (ENSG00000188175), PSG5 (ENSG00000204941), CEACAM18 (ENSG00000213822), CEACAM16 (ENSG00000213892), VSTM5 (ENSG00000214376), PSG3 (ENSG00000221826), PSG7 (ENSG00000221878), PSG1 (ENSG00000231924), PSG2 (ENSG00000242221), PSG11 (ENSG00000243130), PSG4 (ENSG00000243137), CEACAM20 (ENSG00000273777)

Protein

Protein identifiers

Cell adhesion molecule CEACAM8P31997 (reviewed: P31997)

Alternative names: CD67 antigen, Carcinoembryonic antigen CGM6, Carcinoembryonic antigen-related cell adhesion molecule 8, Non-specific cross-reacting antigen NCA-95

All UniProt accessions (3): P31997, M0R1X3, Q0Z7S6

UniProt curated annotations — full annotation on UniProt →

Function. Cell surface glycoprotein that plays a role in cell adhesion in a calcium-independent manner. Mediates heterophilic cell adhesion with other carcinoembryonic antigen-related cell adhesion molecules, such as CEACAM6. Heterophilic interaction with CEACAM8 occurs in activated neutrophils.

Subunit / interactions. Monomer. Heterodimer with CEACAM6; heterodimerizes via its Ig-like V-type domain.

Subcellular location. Cell membrane. Cell surface.

Tissue specificity. Expressed in leukocytes of chronic myeloid Leukemia patients and bone marrow.

Post-translational modifications. Glycosylated.

Domain organisation. The N-terminus Ig-like V-type domain is necessary for heterophilic intercellular adhesion.

Similarity. Belongs to the immunoglobulin superfamily. CEA family.

RefSeq proteins (1): NP_001807* (*=MANE)

Domains & families (InterPro)

IDNameType
IPR003598Ig_sub2Domain
IPR003599Ig_subDomain
IPR007110Ig-like_domDomain
IPR013106Ig_V-setDomain
IPR013783Ig-like_foldHomologous_superfamily
IPR036179Ig-like_dom_sfHomologous_superfamily
IPR050831CEA_cell_adhesionFamily

Pfam: PF07686, PF13895, PF13927

UniProt features (48 total): glycosylation site 11, mutagenesis site 10, strand 9, sequence variant 5, domain 3, disulfide bond 2, helix 2, turn 2, signal peptide 1, chain 1, propeptide 1, lipid moiety-binding region 1

Structure

Experimental structures (PDB)

4 structures.

PDBMethodResolution (Å)
4Y88X-RAY DIFFRACTION1.45
4YIQX-RAY DIFFRACTION1.85
4WTZX-RAY DIFFRACTION2.52
2DKSSOLUTION NMR

Predicted structure (AlphaFold)

ModelpLDDTFraction very-high
AF-P31997-F187.260.79

Functional residue map

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

Post-translational modifications (1): 320

Disulfide bonds (2): 167–215, 259–299

Glycosylation sites (11): 152, 173, 197, 224, 256, 274, 288, 309, 104, 111, 115

Mutagenesis-validated functional residues (10):

PositionPhenotype
40–45no effect on heterophilic cell adhesion.
61–63no effect on heterophilic cell adhesion.
66inhibits heterophilic cell adhesion.
72–75no effect on heterophilic cell adhesion.
78does not affect the monomeric structure. loss of heterodimerization with ceacam6.
78inhibits heterophilic cell adhesion.
85–89no effect on heterophilic cell adhesion.
97no effect on heterophilic cell adhesion.
123does not affect the monomeric structure. decreases heterodimerization with ceacam6.
129does not affect the monomeric structure. loss of heterodimerization with ceacam6.

Function

Pathways and Gene Ontology

Reactome pathways

7 pathways

IDPathway
R-HSA-1566977Fibronectin matrix formation
R-HSA-202733Cell surface interactions at the vascular wall
R-HSA-6798695Neutrophil degranulation
R-HSA-109582Hemostasis
R-HSA-1474244Extracellular matrix organization
R-HSA-168249Innate Immune System
R-HSA-168256Immune System

MSigDB gene sets: 81 (showing top): REACTOME_INNATE_IMMUNE_SYSTEM, GOBP_HETEROPHILIC_CELL_CELL_ADHESION, GOCC_VACUOLAR_MEMBRANE, GOCC_SECRETORY_GRANULE, GOCC_CELL_SURFACE, GOBP_CELL_CELL_ADHESION, SHEDDEN_LUNG_CANCER_GOOD_SURVIVAL_A4, TAKEDA_TARGETS_OF_NUP98_HOXA9_FUSION_16D_DN, VALK_AML_CLUSTER_15, REACTOME_CELL_SURFACE_INTERACTIONS_AT_THE_VASCULAR_WALL, GOCC_SECRETORY_VESICLE, GOCC_SPECIFIC_GRANULE, GOCC_SECRETORY_GRANULE_MEMBRANE, GOCC_SIDE_OF_MEMBRANE, GOMF_PROTEIN_HETERODIMERIZATION_ACTIVITY

GO Biological Process (3): immune response (GO:0006955), heterophilic cell-cell adhesion (GO:0007157), cell adhesion (GO:0007155)

GO Molecular Function (2): protein heterodimerization activity (GO:0046982), protein binding (GO:0005515)

GO Cellular Component (9): obsolete extracellular space (GO:0005615), plasma membrane (GO:0005886), cell surface (GO:0009986), azurophil granule membrane (GO:0035577), specific granule membrane (GO:0035579), extracellular exosome (GO:0070062), tertiary granule membrane (GO:0070821), side of membrane (GO:0098552), membrane (GO:0016020)

Reactome top-level categories

Rollup of top-4 pathways:

CategoryPathways
Extracellular matrix organization1
Hemostasis1
Innate Immune System1
Immune System1

GO top-level categories

Rollup of top GO terms by namespace:

CategoryTerms
cellular anatomical structure3
secretory granule membrane3
membrane2
immune system process1
response to stimulus1
cell-cell adhesion1
cellular process1
protein dimerization activity1
binding1
cell periphery1
lysosomal membrane1
azurophil granule1
specific granule1
extracellular vesicle1
tertiary granule1
leaflet of membrane bilayer1

Protein interactions and networks

STRING

1766 interactions, top by confidence (×1000):

Protein AProtein BPartner UniProtScore
CEACAM8CD19P15391898
CEACAM8FCGR3BO75015862
CEACAM8FCGR3AP08637860
CEACAM8ITGAMP11215854
CEACAM8LGALS3P17931836
CEACAM8GYPAP02724784
CEACAM8NCAM1P13591782
CEACAM8FUT4P22083773
CEACAM8LTFP02788755
CEACAM8SELLP14151753
CEACAM8MPOP05164748
CEACAM8ITGB2P05107744
CEACAM8CR1P17927736
CEACAM8CD33P20138708
CEACAM8CD274Q9NZQ7679

IntAct

21 interactions, top by confidence:

ABTypeScore
CEACAM6CEACAM8psi-mi:“MI:0407”(direct interaction)0.820
CEACAM8CEACAM6psi-mi:“MI:0407”(direct interaction)0.820
CEACAM8CEACAM6psi-mi:“MI:0915”(physical association)0.820
CEACAM8CEACAM1psi-mi:“MI:0915”(physical association)0.710
CEACAM1CEACAM8psi-mi:“MI:0915”(physical association)0.710
CEACAM8CEACAM1psi-mi:“MI:0407”(direct interaction)0.710
CEACAM8CEACAM8psi-mi:“MI:0407”(direct interaction)0.440
ZNF16CEACAM8psi-mi:“MI:0915”(physical association)0.370
ZPLD1CEACAM8psi-mi:“MI:0914”(association)0.350
CEACAM8PRRT4psi-mi:“MI:0914”(association)0.350
ELOA2XRCC2psi-mi:“MI:0914”(association)0.350
RHBDD1A2ML1psi-mi:“MI:0914”(association)0.350
CEACAM8HS3ST1psi-mi:“MI:0914”(association)0.350
CEACAM8VGFpsi-mi:“MI:0914”(association)0.350

BioGRID (120): CEACAM8 (Affinity Capture-MS), CEACAM8 (Reconstituted Complex), NMU (Affinity Capture-MS), ITGA8 (Affinity Capture-MS), BMP7 (Affinity Capture-MS), LARGE (Affinity Capture-MS), GPC4 (Affinity Capture-MS), GALNS (Affinity Capture-MS), CPE (Affinity Capture-MS), CHSY3 (Affinity Capture-MS), PTPRS (Affinity Capture-MS), TXNDC11 (Affinity Capture-MS), MGAT5 (Affinity Capture-MS), MANEAL (Affinity Capture-MS), CACNA2D1 (Affinity Capture-MS)

ESM2 similar proteins: A0A0K2S4Q6, A6NI73, O75019, O75022, O75023, O76036, P0C191, P11464, P11465, P13688, P31997, P40199, P59901, Q00887, Q00888, Q00889, Q08708, Q0V881, Q15238, Q16557, Q28110, Q496F6, Q5M7U7, Q5SQ64, Q6GTX8, Q6ISS4, Q6MG56, Q6PI73, Q863H2, Q863H3, Q8C567, Q8IYS5, Q8MHY9, Q8MJZ2, Q8N149, Q8N423, Q8N6C8, Q8VBT3, Q95JB9, Q96LA5

Diamond homologs: A0A0B4J1L0, D3ZQE1, E9QA28, O75871, P06731, P11464, P11465, P13688, P16573, P31809, P31997, P40198, P40199, Q00887, Q00888, Q00889, Q13046, Q14002, Q15238, Q16557, Q2WEN9, Q3KPI0, Q3UKK2, Q61400, Q63111, Q810J1, Q925P2, Q9D2Z1, Q9UQ72, Q9UQ74, A0A140LHF2, P0DP72, P35329, Q15223, Q15746, Q58EX2, Q6V4S5, Q96FE5, Q9D1T0, Q9GL76

SIGNOR signaling

0 interactions.

Disease & clinical

Clinical variants and AI predictions

ClinVar

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

ClassificationCount (floor)
Pathogenic0
Likely pathogenic0
Uncertain significance56
Likely benign5
Benign0

Top pathogenic / likely-pathogenic (0)

SpliceAI

1025 predictions. Top by Δscore:

VariantEffectΔscore
19:42591289:T:TAdonor_gain1.0000
19:42581350:CTGT:Cacceptor_gain0.9900
19:42589455:A:ACdonor_gain0.9900
19:42589456:C:CCdonor_gain0.9900
19:42589731:CTCCG:Cacceptor_gain0.9900
19:42589732:TCCG:Tacceptor_gain0.9900
19:42589733:CCG:Cacceptor_gain0.9900
19:42589733:CCGC:Cacceptor_gain0.9900
19:42589734:CG:Cacceptor_gain0.9900
19:42589734:CGC:Cacceptor_gain0.9900
19:42589736:C:CCacceptor_gain0.9900
19:42589738:G:Cacceptor_gain0.9900
19:42581354:C:CCacceptor_gain0.9800
19:42589735:GC:Gacceptor_loss0.9800
19:42589736:C:CAacceptor_loss0.9800
19:42589741:C:CTacceptor_gain0.9800
19:42593539:A:ACdonor_gain0.9800
19:42593540:C:CCdonor_gain0.9800
19:42589738:G:GCacceptor_gain0.9700
19:42589742:A:Tacceptor_gain0.9700
19:42594759:CCTCA:Cdonor_loss0.9700
19:42594760:CTCAC:Cdonor_loss0.9700
19:42594761:TCA:Tdonor_loss0.9700
19:42594762:CAC:Cdonor_loss0.9700
19:42594764:C:CTdonor_loss0.9700
19:42589448:GATAC:Gdonor_loss0.9600
19:42589449:ATAC:Adonor_loss0.9600
19:42589450:TACTC:Tdonor_loss0.9600
19:42589451:ACTC:Adonor_loss0.9600
19:42589452:C:Adonor_loss0.9600

AlphaMissense

2260 scored. Top likely-pathogenic:

VariantProtein changeam_pathogenicity
19:42593764:C:AW67C0.983
19:42593764:C:GW67C0.983
19:42593766:A:GW67R0.982
19:42593766:A:TW67R0.982
19:42593645:A:GL107P0.964
19:42589626:C:AW178C0.962
19:42589626:C:GW178C0.962
19:42589516:C:GC215S0.961
19:42589517:A:TC215S0.961
19:42593607:A:CY120D0.959
19:42589628:A:GW178R0.955
19:42589628:A:TW178R0.955
19:42593649:A:GS106P0.955
19:42593600:A:GL122P0.949
19:42588929:C:AW271C0.945
19:42588929:C:GW271C0.945
19:42589660:C:GC167S0.942
19:42589661:A:TC167S0.942
19:42589517:A:GC215R0.936
19:42593765:C:GW67S0.936
19:42593691:C:GG92R0.934
19:42593691:C:TG92R0.934
19:42588931:A:GW271R0.931
19:42588931:A:TW271R0.931
19:42593672:C:GR98P0.930
19:42589661:A:GC167R0.929
19:42589482:A:CS226R0.928
19:42589482:A:TS226R0.928
19:42589484:T:GS226R0.928
19:42589660:C:TC167Y0.921

dbSNP variants (sampled 300 via entrez): RS1000088569 (19:42596393 C>A,G,T), RS1000347199 (19:42582077 T>C), RS1000940941 (19:42583523 A>G), RS1000968172 (19:42588029 T>C,G), RS1000972396 (19:42596921 G>T), RS1001085189 (19:42594803 C>A), RS1001149837 (19:42589942 C>T), RS1001273133 (19:42587740 C>T), RS1001482903 (19:42590178 T>G), RS1001632534 (19:42591203 A>C), RS1002021458 (19:42583780 A>C), RS1002315153 (19:42591081 T>A), RS1002530472 (19:42580061 A>G), RS1002792456 (19:42587575 T>C), RS1003164784 (19:42587075 A>C,G)

Disease associations

OMIM: gene MIM:615747 | disease phenotypes:

GenCC curated gene-disease

Mondo (0):

Orphanet (0):

HPO phenotypes

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

GWAS associations

0 associations (top):

Drugs & pharmacology

Drug and pharmacology data

Is drug target: no

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

CTD chemical–gene interactions

13 total (human), top 13 by PubMed support.

ChemicalActions (top 5)PubMed papers
fluorene-9-bisphenoldecreases expression1
titanium dioxideincreases expression1
ceric oxideincreases expression1
tamibaroteneaffects cotreatment, increases expression1
perfluorooctane sulfonic acidincreases expression1
reparixindecreases reaction, increases expression1
Allergensdecreases expression1
Benzo(a)pyreneincreases methylation1
Tretinoinincreases expression1
Valproic Aciddecreases methylation1
Vanadiumincreases expression1
Zinc Oxideincreases expression1
Coal Ashincreases expression1

Cellosaurus cell lines

1 cell lines: 1 transformed cell line

First 10 cell lines (id-ordered, not curated):

CellosaurusNameCategorySex
CVCL_C0ELHEK293-CEACAM8-FcTransformed cell lineFemale

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.