Gene Gene information from NCBI Gene database.
Entrez ID 2131
Gene name Exostosin glycosyltransferase 1
Gene symbol EXT1
Synonyms (NCBI Gene)
EXTLGCRLGSTRPS2TTV
Chromosome 8
Chromosome location 8q24.11
Summary This gene encodes an endoplasmic reticulum-resident type II transmembrane glycosyltransferase involved in the chain elongation step of heparan sulfate biosynthesis. Mutations in this gene cause the type I form of multiple exostoses. [provided by RefSeq, J
SNPs SNP information provided by dbSNP.
109
SNP ID Visualize variation Clinical significance Consequence
rs11546829 G>A,T Pathogenic, benign Synonymous variant, coding sequence variant, stop gained
rs119103287 C>A,T Pathogenic Missense variant, coding sequence variant
rs119103288 C>T Pathogenic, likely-pathogenic Missense variant, coding sequence variant
rs119103289 G>T Pathogenic Stop gained, coding sequence variant
rs119103290 G>A Pathogenic Missense variant, coding sequence variant
miRNA miRNA information provided by mirtarbase database.
120
miRTarBase ID miRNA Experiments Reference
MIRT020052 hsa-miR-375 Microarray 20215506
MIRT044632 hsa-miR-320a CLASH 23622248
MIRT567645 hsa-miR-3133 PAR-CLIP 20371350
MIRT567644 hsa-miR-186-5p PAR-CLIP 20371350
MIRT558028 hsa-miR-4668-5p PAR-CLIP 20371350
Transcription factors Transcription factors information provided by TRRUST V2 database.
1
Transcription factor Regulation Reference
USF1 Unknown 22037484
Gene ontology (GO) Gene Ontology (GO) annotations describing the biological processes, molecular functions, and cellular components associated with a gene.
140
GO ID Ontology Definition Evidence Reference
GO:0000139 Component Golgi membrane IEA
GO:0000139 Component Golgi membrane TAS 12907669
GO:0000271 Process Polysaccharide biosynthetic process IDA 12907669
GO:0000902 Process Cell morphogenesis IEA
GO:0001503 Process Ossification IEA
Other IDs Other IDs provides unique identifiers for this gene in OMIM, HGNC, and Ensembl databases.
MIM HGNC e!Ensembl
608177 3512 ENSG00000182197
Protein Protein information from UniProt database.
UniProt ID Unique identifier for the protein in the UniProt database. Click to view detailed protein information.
Q16394
Protein name Exostosin-1 (EC 2.4.1.225) (Exostosin glycosyltransferase 1) (Heparan sulfate co-polymerase subunit EXT1) (Multiple exostoses protein 1) (N-acetylglucosaminyl-proteoglycan 4-beta-glucuronosyltransferase)
Protein function Glycosyltransferase forming with EXT2 the heterodimeric heparan sulfate polymerase which catalyzes the elongation of the heparan sulfate glycan backbone (PubMed:10639137, PubMed:22660413, PubMed:36402845, PubMed:36593275, PubMed:9620772). Glycan
PDB 7SCH , 7SCJ , 7SCK , 7UQX , 7UQY , 7ZAY
Family and domains

Pfam

Accession ID Position in sequence Description Type
PF03016 Exostosin 110 396 Exostosin family Family
PF09258 Glyco_transf_64 480 729 Glycosyl transferase family 64 domain Domain
Tissue specificity TISSUE SPECIFICITY: Widely expressed. {ECO:0000269|PubMed:7550340}.
Sequence
Sequence length 746
Interactions View interactions
Pathways Pathway information has different metabolic/signaling pathways associated with genes.
  KEGG  Reactome
  Glycosaminoglycan biosynthesis - heparan sulfate / heparin
Metabolic pathways
  HS-GAG biosynthesis
Defective EXT2 causes exostoses 2
Defective EXT1 causes exostoses 1, TRPS2 and CHDS
Associated diseases Disease associations from ClinVar (causal & non-causal) and other databases (OMIM, Orphanet, GWAS, etc.).
43
Evidence Score: ★☆☆☆☆  Gene-disease association found in Text Mining only ★★☆☆☆  Found in Text Mining and Unknown/Other Associations ★★★☆☆  Reported in Unknown/Other Associations across ≥2 Sources ★★★★☆  ClinVar: Pathogenic/Likely Pathogenic (<5 Variants) ★★★★★  ClinVar: Pathogenic/Likely Pathogenic (≥5 Variants)
Causal Diseases associated with Pathogenic or Likely Pathogenic variants in ClinVar
Phenotype Name Clinical Significance dbSNP ID RCV Accession Evidence Score
Abnormality of the skeletal system Likely pathogenic rs2129786203 RCV001814437
★★★★☆
ClinVar: Pathogenic / Likely Pathogenic (<5 Variants)
Chondrosarcoma Pathogenic; Likely pathogenic rs2130041954, rs119103287, rs587776540, rs119103290, rs1586279285, rs2488052466, rs2488089183, rs886039356, rs886039355, rs886039486, rs2129693279, rs2488085202, rs2488051258, rs1554578798, rs1817895168
View all (2 more)
RCV004796629
RCV005031383
RCV000002603
RCV005031384
RCV003478970
View all (13 more)
★★★★★
ClinVar: Pathogenic / Likely Pathogenic (≥5 Variants)
Colon adenocarcinoma Pathogenic rs1811889441 RCV005917898
★★★★☆
ClinVar: Pathogenic / Likely Pathogenic (<5 Variants)
Exostoses Pathogenic rs1823350857 RCV004798884
★★★★☆
ClinVar: Pathogenic / Likely Pathogenic (<5 Variants)
Unknown / Other Associations ClinVar entries with uncertain/conflicting evidence, and associations from other databases (OMIM, Orphanet, GWAS, etc.) where the gene is not established as causal.
Phenotype Name Clinical Significance Source Evidence Score
ATRIAL FIBRILLATION GWAS catalog
★★☆☆☆
Found in Text Mining + Unknown/Other Associations
AUTISM SPECTRUM DISORDER GWAS catalog
★★☆☆☆
Found in Text Mining + Unknown/Other Associations
AUTISTIC DISORDER CTD, Disgenet
CTD, Disgenet
★★☆☆☆
Found in Text Mining + Unknown/Other Associations
BONE FRACTURE GWAS catalog
★★☆☆☆
Found in Text Mining + Unknown/Other Associations
Associations from Text Mining Disease associations identified through text mining
Disease Name Disease (Merged) Source PMID Relationship Type Evidence Score
Acute lymphocytic leukemia Lymphocytic Leukemia BEFREE 27229929, 31465316
★☆☆☆☆
Found in Text Mining only
Adenocarcinoma Adenocarcinoma BEFREE 18000363
★☆☆☆☆
Found in Text Mining only
Adult Acute Lymphocytic Leukemia Lymphocytic Leukemia BEFREE 27229929, 31465316
★☆☆☆☆
Found in Text Mining only
Antisocial Personality Disorder Antisocial Personality Disorder BEFREE 25421521
★☆☆☆☆
Found in Text Mining only
Astrocytoma Astrocytoma BEFREE 29157673
★☆☆☆☆
Found in Text Mining only
Atrophy Atrophy Pubtator 33478971 Stimulate
★☆☆☆☆
Found in Text Mining only
Autistic Disorder Autism BEFREE 12032595
★★☆☆☆
Found in Text Mining + Unknown/Other Associations
Autistic Disorder Autism LHGDN 12032595
★★☆☆☆
Found in Text Mining + Unknown/Other Associations
Autistic Disorder Autism CTD_human_DG 12032595
★★☆☆☆
Found in Text Mining + Unknown/Other Associations
Autoimmune Diseases Autoimmune Diseases BEFREE 17110309, 31061139
★☆☆☆☆
Found in Text Mining only