HEG1

gene
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Also known as KIAA1237HEG

Summary

HEG1 (heart development protein with EGF like domains 1, HGNC:29227) is a protein-coding gene on chromosome 3q21.2, encoding Protein HEG homolog 1 (Q9ULI3). Receptor component of the CCM signaling pathway which is a crucial regulator of heart and vessel formation and integrity.

Predicted to enable calcium ion binding activity. Involved in several processes, including negative regulation of Rho protein signal transduction; negative regulation of Rho-dependent protein serine/threonine kinase activity; and negative regulation of membrane permeability. Located in cell-cell junction.

Source: NCBI Gene 57493 — RefSeq curated summary.

At a glance

  • GWAS associations: 1
  • Clinical variants (ClinVar): 247 total
  • MANE Select transcript: NM_020733

Identifiers

Gene identifiers

FieldValue
HGNC IDHGNC:29227
Approved symbolHEG1
Nameheart development protein with EGF like domains 1
Location3q21.2
Locus typegene with protein product
StatusApproved
AliasesKIAA1237, HEG
Ensembl geneENSG00000173706
Ensembl biotypeprotein_coding
OMIM614182
Entrez57493

Gene structure

Transcript identifiers

Ensembl transcripts: 5 — 2 protein_coding, 1 protein_coding_CDS_not_defined, 1 nonsense_mediated_decay, 1 retained_intron

ENST00000311127, ENST00000480667, ENST00000482699, ENST00000488654, ENST00000650592

RefSeq mRNA: 1 — MANE Select: NM_020733 NM_020733

CCDS: CCDS46898

Canonical transcript exons

ENST00000311127 — 17 exons

ExonStartEnd
ENSE00001184970124990787124990824
ENSE00001184975124990944124990986
ENSE00001184978124997689124997823
ENSE00001184980125001852125002012
ENSE00001184983125002257125002315
ENSE00001184987125005265125005368
ENSE00001184995125009705125009824
ENSE00001184997125010439125010555
ENSE00001274034124977859124977946
ENSE00001308188125012623125013990
ENSE00001317153124965710124970801
ENSE00001329347124973731124973905
ENSE00001371349125020792125021130
ENSE00001378214125027205125027507
ENSE00001382448125019262125019597
ENSE00001409218125029195125029488
ENSE00001563765125055575125055997

Expression profiles

Bgee: expression breadth ubiquitous, 292 present calls, max score 99.42.

FANTOM5 (CAGE): breadth ubiquitous, TPM avg 26.6514 / max 748.0491, expressed in 1655 samples.

FANTOM5 promoters (17 alternative TSS)

Promoter IDTPM avgSamples expressed
4427015.64111512
442682.2628845
442661.9261804
442711.1704723
442641.1030525
442730.9028663
442650.6594343
442690.5491298
442610.5132276
442720.4686276

Top tissues by expression

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

TissueAnatomy IDExpression scoreQuality
parietal pleuraUBERON:000240099.42gold quality
pleuraUBERON:000097799.20gold quality
visceral pleuraUBERON:000240199.11gold quality
germinal epithelium of ovaryUBERON:000130498.35gold quality
cardiac muscle of right atriumUBERON:000337997.92gold quality
lower lobe of lungUBERON:000894997.73gold quality
synovial jointUBERON:000221797.70gold quality
vena cavaUBERON:000408797.37gold quality
myocardiumUBERON:000234996.78gold quality
superficial temporal arteryUBERON:000161496.46gold quality
tendon of biceps brachiiUBERON:000818896.36gold quality
ventricular zoneUBERON:000305396.27gold quality
layer of synovial tissueUBERON:000761696.21gold quality
cardia of stomachUBERON:000116295.79gold quality
heart right ventricleUBERON:000208095.75gold quality
urethraUBERON:000005795.65gold quality
pericardiumUBERON:000240795.62gold quality
colonic epitheliumUBERON:000039795.26gold quality
left ventricle myocardiumUBERON:000656695.00gold quality
adult organismUBERON:000702394.97gold quality
mucosa of urinary bladderUBERON:000125994.63gold quality
gall bladderUBERON:000211094.48gold quality
pylorusUBERON:000116694.40gold quality
hair follicleUBERON:000207394.36gold quality
mucosa of paranasal sinusUBERON:000503094.31gold quality
lungUBERON:000204894.24gold quality
saphenous veinUBERON:000731894.15gold quality
blood vessel layerUBERON:000479793.70gold quality
subthalamic nucleusUBERON:000190693.64gold quality
inferior vagus X ganglionUBERON:000536393.54gold quality

Single-cell (SCXA)

Detected in 6 experiment(s), a significant marker in 4.

ExperimentMarker?Max mean expression
E-MTAB-8205yes385.03
E-GEOD-135922yes38.06
E-CURD-119yes23.47
E-ANND-3yes20.37
E-GEOD-124858no662.15
E-MTAB-10137no3.90

Regulation

Is transcription factor: no

miRNA regulators (miRDB)

210 targeting HEG1, 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-5692A100.0074.406850
HSA-MIR-4692100.0067.322066
HSA-MIR-513A-5P100.0069.772465
HSA-MIR-3689D100.0066.141181
HSA-MIR-200B-3P100.0073.312693
HSA-MIR-200C-3P100.0073.352685
HSA-MIR-429100.0073.442698
HSA-MIR-6851-5P100.0065.631294
HSA-MIR-3163100.0077.238605
HSA-MIR-371B-5P99.9975.344759
HSA-MIR-451499.9967.101870
HSA-MIR-548C-3P99.9974.017587
HSA-MIR-196A-1-3P99.9972.152772
HSA-MIR-453499.9966.581907
HSA-MIR-477599.9875.006394
HSA-MIR-27A-3P99.9872.132955
HSA-MIR-27B-3P99.9872.132955
HSA-MIR-998599.9872.112939
HSA-MIR-520D-5P99.9873.344883
HSA-MIR-524-5P99.9873.434882
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-3065-5P99.9771.563281
HSA-MIR-302C-5P99.9772.563642
HSA-MIR-365899.9673.874379
HSA-MIR-590-3P99.9674.346478
HSA-MIR-548AA99.9670.643753
HSA-MIR-548AP-3P99.9670.643753

Literature-anchored findings (GeneRIF, showing 12)

  • Identification of the zebrafish heart of glass (heg) gene. Description of HEG’s role in the regulation of concentric heart growth in zebrafish. (PMID:14680629)
  • These data show that HEG1 can recruit the Rap1-KRIT complex to the plasma membrane. (PMID:23814056)
  • Human patients with cerebral cavernous malformations who lack exonic mutations in krev interaction trapped protein (KRIT)1, cerebral cavernous malformation (CCM) protein 2, or programmed cell death (PDCD)10 protein do not have mutations in HEG. (PMID:24643410)
  • These studies establish that the binding of HEG1 to Rasip1 mediates Rap1-dependent recruitment of Rasip1 to and stabilization of endothelial cell cell-cell junctions. (PMID:26780829)
  • Study shows that HEG homolog 1 is a novel mucin-like membrane protein that serves as a diagnostic and therapeutic target for malignant mesothelioma. (PMID:28361969)
  • he specific detection of mesothelioma with SKM9-2 can thus be performed by the recognition of sialylated glycan modification in the specific region of HEG1 (PMID:30250045)
  • HEG1 overexpression significantly promotes HCC cell migration, invasion and epithelial-mesenchymal transition. (PMID:31278131)
  • HEG1 Is a Highly Specific and Sensitive Marker of Epithelioid Malignant Mesothelioma. (PMID:32205484)
  • HEG1-responsive microRNA-23b regulates cell proliferation in malignant mesothelioma cells. (PMID:32284171)
  • LncRNA SNHG12 promotes proliferation and epithelial mesenchymal transition in hepatocellular carcinoma through targeting HEG1 via miR-516a-5p. (PMID:33774129)
  • Membranous HEG1 expression is a useful marker in the differential diagnosis of epithelioid and biphasic malignant mesothelioma versus carcinomas. (PMID:34240508)
  • HEG1 Protects Against Atherosclerosis by Regulating Stable Flow-Induced KLF2/4 Expression in Endothelial Cells. (PMID:38099436)

Cross-species orthologs

3 orthologs

OrganismSymbolGene ID
danio_rerioheg1ENSDARG00000018441
mus_musculusHeg1ENSMUSG00000075254
rattus_norvegicusHeg1ENSRNOG00000001793

Protein

Protein identifiers

Protein HEG homolog 1Q9ULI3 (reviewed: Q9ULI3)

All UniProt accessions (3): Q9ULI3, A0A994J6K3, H7C4K2

UniProt curated annotations — full annotation on UniProt →

Function. Receptor component of the CCM signaling pathway which is a crucial regulator of heart and vessel formation and integrity. May act through the stabilization of endothelial cell junctions.

Subunit / interactions. Interacts with CCM2 and KRIT1; KRIT1 markedly facilitates interaction with CCM2.

Subcellular location. Cell membrane. Cell junction Secreted.

Isoforms (2)

UniProt IDNamesCanonical?
Q9ULI3-11yes
Q9ULI3-22

RefSeq proteins (1): NP_065784* (*=MANE)

Domains & families (InterPro)

IDNameType
IPR000152EGF-type_Asp/Asn_hydroxyl_sitePTM
IPR000742EGFDomain
IPR001881EGF-like_Ca-bd_domDomain
IPR018097EGF_Ca-bd_CSConserved_site
IPR049883NOTCH1_EGF-likeDomain

Pfam: PF00008, PF07645

UniProt features (50 total): compositionally biased region 13, glycosylation site 9, region of interest 7, disulfide bond 6, sequence variant 5, topological domain 2, splice variant 2, domain 2, signal peptide 1, chain 1, modified residue 1, transmembrane region 1

Structure

Experimental structures (PDB)

2 structures.

PDBMethodResolution (Å)
4HDQX-RAY DIFFRACTION1.95
3U7DX-RAY DIFFRACTION2.49

Predicted structure (AlphaFold)

ModelpLDDTFraction very-high
AF-Q9ULI3-F142.340.02

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): 1359

Disulfide bonds (6): 989–1000, 994–1011, 1013–1022, 1029–1040, 1034–1049, 1051–1062

Glycosylation sites (9): 67, 123, 159, 180, 314, 462, 520, 610, 1137

Function

Pathways and Gene Ontology

Reactome pathways

0 pathways

MSigDB gene sets: 356 (showing top): GOBP_CARDIAC_CHAMBER_DEVELOPMENT, GOBP_ENDOTHELIAL_CELL_DEVELOPMENT, GOBP_EMBRYO_DEVELOPMENT_ENDING_IN_BIRTH_OR_EGG_HATCHING, GOBP_EPITHELIUM_DEVELOPMENT, KOBAYASHI_EGFR_SIGNALING_24HR_UP, GOBP_MUSCLE_TISSUE_DEVELOPMENT, GOBP_CARDIAC_SEPTUM_DEVELOPMENT, GOBP_CIRCULATORY_SYSTEM_PROCESS, GOBP_REGULATION_OF_PHOSPHORYLATION, DACOSTA_UV_RESPONSE_VIA_ERCC3_XPCS_DN, GOBP_HEART_TRABECULA_MORPHOGENESIS, GOBP_NEGATIVE_REGULATION_OF_KINASE_ACTIVITY, GOBP_CARDIAC_CHAMBER_MORPHOGENESIS, GOBP_EPITHELIAL_CELL_DEVELOPMENT, MODULE_45

GO Biological Process (26): vasculogenesis (GO:0001570), in utero embryonic development (GO:0001701), endothelial cell morphogenesis (GO:0001886), lymph vessel development (GO:0001945), lymph circulation (GO:0003017), cardiac atrium morphogenesis (GO:0003209), ventricular trabecula myocardium morphogenesis (GO:0003222), ventricular septum development (GO:0003281), heart development (GO:0007507), post-embryonic development (GO:0009791), lung development (GO:0030324), negative regulation of Rho protein signal transduction (GO:0035024), multicellular organism growth (GO:0035264), cell-cell junction organization (GO:0045216), venous blood vessel morphogenesis (GO:0048845), regulation of body fluid levels (GO:0050878), cardiac muscle tissue growth (GO:0055017), pericardium development (GO:0060039), positive regulation of fibroblast growth factor production (GO:0090271), protein localization to cell junction (GO:1902414), negative regulation of membrane permeability (GO:1905709), obsolete negative regulation of Rho-dependent protein serine/threonine kinase activity (GO:2000299), endothelial cell development (GO:0001885), vasculature development (GO:0001944), regulation of macromolecule metabolic process (GO:0060255), regulation of biological quality (GO:0065008)

GO Molecular Function (2): calcium ion binding (GO:0005509), protein binding (GO:0005515)

GO Cellular Component (7): extracellular region (GO:0005576), cell-cell junction (GO:0005911), external side of plasma membrane (GO:0009897), plasma membrane (GO:0005886), cell surface (GO:0009986), membrane (GO:0016020), anchoring junction (GO:0070161)

GO top-level categories

Rollup of top GO terms by namespace:

CategoryTerms
cellular anatomical structure3
blood vessel morphogenesis2
animal organ development2
multicellular organismal process2
developmental growth2
cell differentiation1
chordate embryonic development1
endothelial cell development1
epithelial cell morphogenesis1
vasculature development1
anatomical structure development1
circulatory system process1
cardiac chamber morphogenesis1
cardiac atrium development1
ventricular cardiac muscle tissue morphogenesis1
heart trabecula morphogenesis1
cardiac ventricle development1
cardiac septum development1
circulatory system development1
multicellular organism development1
respiratory tube development1
respiratory system development1
Rho protein signal transduction1
regulation of Rho protein signal transduction1
negative regulation of small GTPase mediated signal transduction1
cell junction organization1
venous blood vessel development1
regulation of biological quality1
cardiac muscle tissue development1
heart growth1
heart development1
epithelium development1
positive regulation of cytokine production1
fibroblast growth factor production1
regulation of fibroblast growth factor production1
intracellular protein localization1
metal ion binding1
binding1
anchoring junction1
plasma membrane1

Protein interactions and networks

STRING

1211 interactions, top by confidence (×1000):

Protein AProtein BPartner UniProtScore
HEG1KRIT1O00522966
HEG1CCM2Q9BSQ5837
HEG1PDCD10Q9BUL8773
HEG1RASIP1Q5U651662
HEG1CCM2LQ9NUG4584
HEG1CTNNB1P35222532
HEG1ITGB1BP1O14713507
HEG1CCDC102AQ96A19460
HEG1STK25O00506386
HEG1C1orf198Q9H425371
HEG1ARHGAP29Q52LW3366
HEG1RAP1AP10113359
HEG1KTN1Q86UP2352
HEG1RPA1P27694349
HEG1COX7A2P14406349
HEG1INO80DQ53TQ3349

IntAct

20 interactions, top by confidence:

ABTypeScore
HEG1KRIT1psi-mi:“MI:0915”(physical association)0.730
HEG1KRIT1psi-mi:“MI:0407”(direct interaction)0.730
LGALS1PODXLpsi-mi:“MI:0914”(association)0.530
LGALS3PODXLpsi-mi:“MI:0914”(association)0.530
LGALS1LAMA5psi-mi:“MI:0914”(association)0.530
FBXO2TMEM131Lpsi-mi:“MI:0914”(association)0.530
LGALS8SLC22A23psi-mi:“MI:0914”(association)0.350
LGALS3PODXLpsi-mi:“MI:0914”(association)0.350
KRIT1UBFD1psi-mi:“MI:0914”(association)0.350
LGALS8NPC1psi-mi:“MI:0914”(association)0.350
LGALS3SDCBPpsi-mi:“MI:0914”(association)0.350

BioGRID (18): HEG1 (Affinity Capture-MS), HEG1 (Affinity Capture-MS), HEG1 (Affinity Capture-MS), HEG1 (Affinity Capture-MS), HEG1 (Affinity Capture-MS), HEG1 (Affinity Capture-RNA), HEG1 (Proximity Label-MS), HEG1 (Affinity Capture-MS), HEG1 (Affinity Capture-MS), HEG1 (Affinity Capture-MS), HEG1 (Affinity Capture-MS), HEG1 (Affinity Capture-MS), HEG1 (Affinity Capture-RNA), HEG1 (Proximity Label-MS), HEG1 (Proximity Label-MS)

ESM2 similar proteins: A0A1B0GUW6, A1EGX6, A6NM11, A6NMS7, A6QLF8, D3YU32, I3L273, J3KML8, O35930, O60309, Q08DY0, Q14242, Q2TBI7, Q32KG4, Q32L62, Q3MIW9, Q3TNW5, Q3V0E1, Q4R729, Q5VWK0, Q5VYM1, Q62170, Q659K0, Q68DN1, Q6AZ54, Q6MG22, Q6UXB8, Q6ZRG5, Q8BUE7, Q8K4E0, Q8N307, Q8N3K9, Q8TCU4, Q8WNU4, Q8WXI7, Q95JY5, Q96F05, Q96JA4, Q96M34, Q96M43

Diamond homologs: A0A096LNW5, A2RUV0, B4DH59, G3I6Z6, O35474, O35516, O75095, O89019, P07207, P0DPK3, P0DPK4, P13508, P20749, P21783, P31695, P46530, P46531, P82279, Q01705, Q04721, Q07008, Q20911, Q499M5, Q502K3, Q5RBP1, Q61982, Q6UXI9, Q6UY11, Q7Z3S9, Q810B6, Q8AVH7, Q8IUX8, Q91V88, Q99466, Q9FY48, Q9JJZ5, Q9P2R3, Q9QW30, Q9QXT5, Q9R172

SIGNOR signaling

0 interactions.

Disease & clinical

Clinical variants and AI predictions

ClinVar

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

ClassificationCount (floor)
Pathogenic0
Likely pathogenic0
Uncertain significance191
Likely benign22
Benign4

Top pathogenic / likely-pathogenic (0)

SpliceAI

2496 predictions. Top by Δscore:

VariantEffectΔscore
3:124970806:T:TCacceptor_gain1.0000
3:124970810:C:CTacceptor_gain1.0000
3:124970810:C:Tacceptor_gain1.0000
3:124970811:A:Tacceptor_gain1.0000
3:124973681:T:TAdonor_gain1.0000
3:124973726:CACA:Cdonor_loss1.0000
3:124973727:ACAC:Adonor_loss1.0000
3:124973728:CA:Cdonor_loss1.0000
3:124973729:A:ACdonor_gain1.0000
3:124973729:AC:Adonor_loss1.0000
3:124973730:C:CCdonor_gain1.0000
3:124973730:CCGAG:Cdonor_loss1.0000
3:124973744:T:TAdonor_gain1.0000
3:124973773:T:TAdonor_gain1.0000
3:124973774:C:Adonor_gain1.0000
3:124973902:CTTT:Cacceptor_gain1.0000
3:124973906:C:CCacceptor_gain1.0000
3:124977853:ACTT:Adonor_loss1.0000
3:124977854:CTTA:Cdonor_loss1.0000
3:124977855:TTAC:Tdonor_loss1.0000
3:124977856:TACCT:Tdonor_loss1.0000
3:124977857:ACC:Adonor_loss1.0000
3:124977858:C:CTdonor_loss1.0000
3:124990785:A:ACdonor_gain1.0000
3:124990786:C:CCdonor_gain1.0000
3:124990825:C:CCacceptor_gain1.0000
3:124990833:C:CTacceptor_gain1.0000
3:124990833:C:Tacceptor_gain1.0000
3:124990834:A:Tacceptor_gain1.0000
3:124990939:CCTAC:Cdonor_loss1.0000

AlphaMissense

8829 scored. Top likely-pathogenic:

VariantProtein changeam_pathogenicity
3:124973806:C:AW1307C1.000
3:124973806:C:GW1307C1.000
3:124990983:C:GC1219S1.000
3:124990983:C:TC1219Y1.000
3:124990984:A:TC1219S1.000
3:124970718:G:CC1360W0.999
3:124970720:A:GC1360R0.999
3:124973808:A:GW1307R0.999
3:124973808:A:TW1307R0.999
3:124990795:C:GC1242S0.999
3:124990796:A:TC1242S0.999
3:124990816:A:CF1235C0.999
3:124990822:C:GC1233S0.999
3:124990822:C:TC1233Y0.999
3:124990823:A:GC1233R0.999
3:124990823:A:TC1233S0.999
3:124990949:G:CC1230W0.999
3:124990950:C:GC1230S0.999
3:124990950:C:TC1230Y0.999
3:124990951:A:GC1230R0.999
3:124990951:A:TC1230S0.999
3:124990982:A:CC1219W0.999
3:124990983:C:AC1219F0.999
3:124990984:A:GC1219R0.999
3:124997694:C:GC1216S0.999
3:124997695:A:GC1216R0.999
3:124997695:A:TC1216S0.999
3:124997721:A:CF1207C0.999
3:124997736:C:GC1202S0.999
3:124997737:A:GC1202R0.999

dbSNP variants (sampled 300 via entrez): RS1000026269 (3:125031395 T>C), RS1000067244 (3:124988184 A>C), RS1000096236 (3:125032726 A>T), RS1000120483 (3:125055300 T>A,C), RS1000173451 (3:125055158 T>A), RS1000203711 (3:125007370 T>A), RS1000265116 (3:125055820 GGCA>G,GGCAGCA), RS1000272629 (3:125015174 T>C), RS1000277785 (3:125037746 G>A), RS1000288939 (3:124971303 G>A,T), RS1000290739 (3:125038250 CCTCG>C), RS1000290971 (3:124994595 T>A), RS1000300286 (3:125056090 C>T), RS1000330652 (3:125001481 A>C), RS1000370570 (3:125044469 T>C)

Disease associations

OMIM: gene MIM:614182 | disease phenotypes:

GenCC curated gene-disease

Mondo (0):

Orphanet (0):

HPO phenotypes

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

GWAS associations

1 associations (top):

StudyTraitp-value
GCST010083_122Hemoglobin levels3.000000e-08

EFO canonical traits (1, from GWAS)

EFO IDTrait name
EFO:0004509hemoglobin measurement

Drugs & pharmacology

Drug and pharmacology data

Is drug target: no

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

CTD chemical–gene interactions

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

ChemicalActions (top 5)PubMed papers
Estradiolincreases reaction, affects cotreatment, decreases expression, increases expression4
sodium arseniteaffects cotreatment, increases abundance, decreases expression3
Aflatoxin B1affects expression, increases expression, increases methylation3
Particulate Matterdecreases expression, increases abundance3
perfluorooctane sulfonic aciddecreases expression2
entinostatdecreases expression, affects cotreatment2
belinostatdecreases expression, affects cotreatment2
Panobinostataffects cotreatment, decreases expression2
Air Pollutantsdecreases expression, increases abundance2
Arsenicaffects methylation, affects cotreatment, decreases expression, increases abundance2
Benzo(a)pyreneaffects methylation, increases expression2
Nickelincreases expression2
Tamoxifenaffects expression, affects cotreatment, increases expression, decreases expression2
Tobacco Smoke Pollutiondecreases expression2
Valproic Acidincreases expression2
p-Chloromercuribenzoic Acidaffects cotreatment, decreases expression2
Raloxifene Hydrochlorideaffects expression, affects cotreatment, increases expression, decreases expression2
dicrotophosincreases expression1
triphenyl phosphateaffects expression1
hydroxyhydroquinonedecreases expression1
tris(1,3-dichloro-2-propyl)phosphatedecreases expression1
cobaltous chlorideaffects cotreatment, increases expression1
perfluorooctanoic aciddecreases expression1
manganese chlorideincreases abundance, affects cotreatment, decreases expression1
potassium chromate(VI)affects cotreatment, decreases expression1
lead chlorideincreases expression, affects cotreatment1
cadmium sulfateaffects cotreatment, increases expression1
epigallocatechin gallateaffects cotreatment, decreases expression1
avobenzoneincreases expression1
CGP 52608affects binding, increases reaction1

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.