Gene Gene information from NCBI Gene database.
Entrez ID 1298
Gene name Collagen type IX alpha 2 chain
Gene symbol COL9A2
Synonyms (NCBI Gene)
DJ39G22.4EDM2MEDSTL5
Chromosome 1
Chromosome location 1p34.2
Summary This gene encodes one of the three alpha chains of type IX collagen, the major collagen component of hyaline cartilage. Type IX collagen, a heterotrimeric molecule, is usually found in tissues containing type II collagen, a fibrillar collagen. This chain
SNPs SNP information provided by dbSNP.
12
SNP ID Visualize variation Clinical significance Consequence
rs138882727 G>A Conflicting-interpretations-of-pathogenicity, uncertain-significance, likely-benign Synonymous variant, coding sequence variant
rs148362133 C>T Conflicting-interpretations-of-pathogenicity Missense variant, coding sequence variant
rs150687987 G>A,C Conflicting-interpretations-of-pathogenicity, likely-benign Missense variant, coding sequence variant
rs373264436 T>A,C Conflicting-interpretations-of-pathogenicity, uncertain-significance Coding sequence variant, missense variant
rs535212284 C>T Likely-pathogenic Missense variant, coding sequence variant
miRNA miRNA information provided by mirtarbase database.
210
miRTarBase ID miRNA Experiments Reference
MIRT019087 hsa-miR-335-5p Microarray 18185580
MIRT619000 hsa-miR-4494 HITS-CLIP 23824327
MIRT618999 hsa-miR-499b-5p HITS-CLIP 23824327
MIRT618998 hsa-miR-7112-3p HITS-CLIP 23824327
MIRT618997 hsa-miR-4711-5p HITS-CLIP 23824327
Gene ontology (GO) Gene Ontology (GO) annotations describing the biological processes, molecular functions, and cellular components associated with a gene.
16
GO ID Ontology Definition Evidence Reference
GO:0001501 Process Skeletal system development TAS 10364514
GO:0005515 Function Protein binding IPI 32296183
GO:0005576 Component Extracellular region IEA
GO:0005576 Component Extracellular region TAS
GO:0005581 Component Collagen trimer IEA
Other IDs Other IDs provides unique identifiers for this gene in OMIM, HGNC, and Ensembl databases.
MIM HGNC e!Ensembl
120260 2218 ENSG00000049089
Protein Protein information from UniProt database.
UniProt ID Unique identifier for the protein in the UniProt database. Click to view detailed protein information.
Q14055
Protein name Collagen alpha-2(IX) chain
Protein function Structural component of hyaline cartilage and vitreous of the eye.
PDB 5CTD , 5CTI , 5CVA , 5CVB
Family and domains

Pfam

Accession ID Position in sequence Description Type
PF01391 Collagen 25 81 Collagen triple helix repeat (20 copies) Repeat
PF01391 Collagen 60 116 Collagen triple helix repeat (20 copies) Repeat
PF01391 Collagen 114 171 Collagen triple helix repeat (20 copies) Repeat
PF01391 Collagen 176 236 Collagen triple helix repeat (20 copies) Repeat
PF01391 Collagen 314 386 Collagen triple helix repeat (20 copies) Repeat
PF01391 Collagen 406 481 Collagen triple helix repeat (20 copies) Repeat
PF01391 Collagen 460 524 Collagen triple helix repeat (20 copies) Repeat
PF01391 Collagen 550 611 Collagen triple helix repeat (20 copies) Repeat
PF01391 Collagen 609 667 Collagen triple helix repeat (20 copies) Repeat
Sequence
MAAATASPRSLLVLLQVVVLALAQIRGPPGERGPPGPPGPPGVPGSDGIDGDNGPPGKAG
PPGPKGEPGKAGPDGPDGKPG
IDGLTGAKGEPGPMGIPGVKGQPGLPGPPGLPGPGFAGP
PGPPGPVGLPGEIGIRGPKGDPGPDGPSGPPGPPGKPGRPGTIQGLEGSAD
FLCPTNCPP
GMKGPPGLQGVKGHAGKRGILGDPGHQGKPGPKGDVGASGEQGIPGPPGPQGIRGY
PGMA
GPKGETGPHGYKGMVGAIGATGPPGEEGPRGPPGRAGEKGDEGSPGIRGPQGITGPKGAT
GPPGINGKDGTPGTPGMKGSAGQAGQPGSPGHQGLAGVPGQPGTKGGPGDQGEPGPQGLP
GFSGPPGKEGEPGPRGEIGPQGIMGQ
KGDQGERGPVGQPGPQGRQGPKGEQGPPGIPGPQ
GLPGVKGDKGSPGKTGPRGKVGDPGVAGLPGEKGEKGES
GEPGPKGQQGVRGEPGYPGPS
G
DAGAPGVQGYPGPPGPRGLAGNRGVPGQPGRQGVEGRDATDQH
IVDVALKMLQEQLAEV
AVSAKREALGAVGMMGPPGPPGPPGYPGKQGPHGHPGPRGVPGIVGAVGQIGNTGPKGKR
GEKGDPGE
VGRGHPGMPGPPGIPGLPGRPGQAINGKDGDRGSPGAPGEAGRPGLPGPVGL
PGFCEPA
ACLGASAYASARLTEPGSIKGP
Sequence length 689
Interactions View interactions
Pathways Pathway information has different metabolic/signaling pathways associated with genes.
  KEGG  Reactome
  PI3K-Akt signaling pathway
Focal adhesion
ECM-receptor interaction
Cytoskeleton in muscle cells
Protein digestion and absorption
Human papillomavirus infection
  Collagen biosynthesis and modifying enzymes
Signaling by PDGF
Assembly of collagen fibrils and other multimeric structures
Integrin cell surface interactions
ECM proteoglycans
NCAM1 interactions
Collagen chain trimerization
Associated diseases Disease associations from ClinVar (causal & non-causal) and other databases (OMIM, Orphanet, GWAS, etc.).
34
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
COL9A2-related disorder Likely pathogenic; Pathogenic rs2522561294, rs2522513640, rs1085307973, rs756694568 RCV003400099
RCV003892245
RCV004740263
RCV003396351
★★★★☆
ClinVar: Pathogenic / Likely Pathogenic (<5 Variants)
Epiphyseal dysplasia, multiple, 2 Likely pathogenic; Pathogenic rs1040081238, rs2124062571, rs1569763139, rs1569763108, rs1085307973, rs775401012, rs756694568 RCV003485720
RCV001775396
RCV000018680
RCV000018682
RCV000018684
View all (3 more)
★★★★★
ClinVar: Pathogenic / Likely Pathogenic (≥5 Variants)
Intellectual disability Likely pathogenic rs1431787303 RCV001261389
★★★★☆
ClinVar: Pathogenic / Likely Pathogenic (<5 Variants)
Stickler syndrome Likely pathogenic; Pathogenic rs781682527 RCV001375166
★★★★☆
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
Acute myeloid leukemia Benign; Conflicting classifications of pathogenicity; Likely benign ClinVar
★★☆☆☆
Found in Text Mining + Unknown/Other Associations
AUTOSOMAL RECESSIVE STICKLER SYNDROME GWAS catalog, Orphanet
GWAS catalog, Orphanet
★★☆☆☆
Found in Text Mining + Unknown/Other Associations
Cervical cancer Benign; Uncertain significance; Likely benign ClinVar
★★☆☆☆
Found in Text Mining + Unknown/Other Associations
Clear cell carcinoma of kidney Likely benign ClinVar
★★☆☆☆
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
Achondroplasia Achondroplasia Pubtator 9258750 Associate
★☆☆☆☆
Found in Text Mining only
Adult Medulloblastoma Medulloblastoma BEFREE 15367707, 21720807, 24756834, 2478022
★☆☆☆☆
Found in Text Mining only
alpha Thalassemia Alpha thalassemia Pubtator 26377141 Associate
★☆☆☆☆
Found in Text Mining only
alpha-Thalassemia alpha Thalassemia BEFREE 10973135, 11378664, 12028055, 1520607, 22924376
★☆☆☆☆
Found in Text Mining only
alpha^+^ Thalassemia alpha Thalassemia BEFREE 10973135, 11378664, 12028055, 1520607, 22924376
★☆☆☆☆
Found in Text Mining only
Anemia Sickle Cell Sickle cell anemia Pubtator 35319015 Associate
★☆☆☆☆
Found in Text Mining only
Asthma Asthma BEFREE 29805540
★☆☆☆☆
Found in Text Mining only
Astigmatism Astigmatism HPO_DG
★☆☆☆☆
Found in Text Mining only
Atrial Fibrillation Atrial Fibrillation BEFREE 30643080
★☆☆☆☆
Found in Text Mining only
Autosomal recessive Stickler syndrome Stickler Syndrome Orphanet
★★☆☆☆
Found in Text Mining + Unknown/Other Associations