Gene Gene information from NCBI Gene database.
Entrez ID 6948
Gene name Transcobalamin 2
Gene symbol TCN2
Synonyms (NCBI Gene)
D22S676D22S750IITCTC IITC-2TC2TCII
Chromosome 22
Chromosome location 22q12.2
Summary This gene encodes a member of the vitamin B12-binding protein family. This family of proteins, alternatively referred to as R binders, is expressed in various tissues and secretions. This plasma protein binds cobalamin and mediates the transport of cobala
SNPs SNP information provided by dbSNP.
12
SNP ID Visualize variation Clinical significance Consequence
rs35915865 T>C Conflicting-interpretations-of-pathogenicity Coding sequence variant, missense variant
rs372866837 A>G,T Pathogenic Intron variant
rs606231119 T>G Pathogenic Intron variant, splice donor variant
rs778381859 TC>- Uncertain-significance, pathogenic-likely-pathogenic, pathogenic Frameshift variant, coding sequence variant
rs955351335 AG>- Pathogenic Splice acceptor variant
miRNA miRNA information provided by mirtarbase database.
217
miRTarBase ID miRNA Experiments Reference
MIRT621452 hsa-miR-208a-5p HITS-CLIP 23824327
MIRT621451 hsa-miR-208b-5p HITS-CLIP 23824327
MIRT621450 hsa-miR-1234-3p HITS-CLIP 23824327
MIRT621449 hsa-miR-7107-5p HITS-CLIP 23824327
MIRT621448 hsa-miR-150-5p HITS-CLIP 23824327
Transcription factors Transcription factors information provided by TRRUST V2 database.
4
Transcription factor Regulation Reference
SP1 Unknown 9774437
SP3 Unknown 9774437
USF1 Unknown 9774437
USF2 Unknown 9774437
Gene ontology (GO) Gene Ontology (GO) annotations describing the biological processes, molecular functions, and cellular components associated with a gene.
23
GO ID Ontology Definition Evidence Reference
GO:0005515 Function Protein binding IPI 27411955
GO:0005576 Component Extracellular region IEA
GO:0005576 Component Extracellular region TAS
GO:0005615 Component Extracellular space IBA
GO:0005615 Component Extracellular space IDA 8443384
Other IDs Other IDs provides unique identifiers for this gene in OMIM, HGNC, and Ensembl databases.
MIM HGNC e!Ensembl
613441 11653 ENSG00000185339
Protein Protein information from UniProt database.
UniProt ID Unique identifier for the protein in the UniProt database. Click to view detailed protein information.
P20062
Protein name Transcobalamin-2 (TC-2) (Transcobalamin II) (TC II) (TCII)
Protein function Primary vitamin B12-binding and transport protein. Delivers cobalamin to cells.
PDB 2BB5 , 4ZRP , 4ZRQ , 5NO0 , 5NP4 , 5NRP , 5NSA , 7QBD , 7QBE , 7QBF , 7QBG
Family and domains

Pfam

Accession ID Position in sequence Description Type
PF01122 Cobalamin_bind 3 327 Eukaryotic cobalamin-binding protein Family
PF14478 DUF4430 352 426 Domain of unknown function (DUF4430) Domain
Sequence
Sequence length 427
Interactions View interactions
Pathways Pathway information has different metabolic/signaling pathways associated with genes.
  KEGG  Reactome
  Vitamin digestion and absorption
Cobalamin transport and metabolism
  Cobalamin (Cbl, vitamin B12) transport and metabolism
Defective TCN2 causes hereditary megaloblastic anemia
Defective CD320 causes methylmalonic aciduria
Associated diseases Disease associations from ClinVar (causal & non-causal) and other databases (OMIM, Orphanet, GWAS, etc.).
33
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
Pancytopenia Likely pathogenic; Pathogenic rs2087581122 RCV001730751
★★★★☆
ClinVar: Pathogenic / Likely Pathogenic (<5 Variants)
TCN2-related disorder Likely pathogenic; Pathogenic rs2517903551, rs1198019350 RCV003400105
RCV003909040
★★★★☆
ClinVar: Pathogenic / Likely Pathogenic (<5 Variants)
Transcobalamin II deficiency Likely pathogenic; Pathogenic rs2145536487, rs2145536721, rs771755125, rs2145545140, rs766478911, rs1157135425, rs606231119, rs372866837, rs2145548128, rs747615809, rs747257199, rs1252562083, rs2517908566, rs2517903551, rs2517912426
View all (32 more)
RCV001378425
RCV001542703
RCV001806355
RCV001901214
RCV001863330
View all (43 more)
★★★★★
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 ClinVar
★★☆☆☆
Found in Text Mining + Unknown/Other Associations
Adrenocortical carcinoma, hereditary Benign; Likely benign ClinVar
★★☆☆☆
Found in Text Mining + Unknown/Other Associations
ALZHEIMER DISEASE GWAS catalog
★★☆☆☆
Found in Text Mining + Unknown/Other Associations
ANEMIA, MEGALOBLASTIC CTD, Disgenet
CTD, Disgenet
★★☆☆☆
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
Adenoma Adenoma CTD_human_DG 17389618
★☆☆☆☆
Found in Text Mining only
Adenoma, Basal Cell Adenoma CTD_human_DG 17389618
★☆☆☆☆
Found in Text Mining only
Adenoma, Microcystic Adenoma CTD_human_DG 17389618
★☆☆☆☆
Found in Text Mining only
Adenoma, Monomorphic Adenoma CTD_human_DG 17389618
★☆☆☆☆
Found in Text Mining only
Adenoma, Trabecular Adenoma CTD_human_DG 17389618
★☆☆☆☆
Found in Text Mining only
Adrenoleukodystrophy Adrenoleukodystrophy Pubtator 19353223 Associate
★☆☆☆☆
Found in Text Mining only
Agammaglobulinemia Agammaglobulinemia GENOMICS_ENGLAND_DG 10518276, 18956254, 18956255
★☆☆☆☆
Found in Text Mining only
Agranulocytosis Agranulocytosis GENOMICS_ENGLAND_DG 19373259
★☆☆☆☆
Found in Text Mining only
Anemia Megaloblastic Megaloblastic anemia Pubtator 14689755, 33023511 Associate
★☆☆☆☆
Found in Text Mining only
Anemia, Macrocytic Anemia HPO_DG
★☆☆☆☆
Found in Text Mining only