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 categorized as Causal (Pathogenic/Likely Pathogenic) or Unknown.
678
Causal Diseases associated with Pathogenic or Likely Pathogenic variants in ClinVar
Phenotype Name Clinical Significance dbSNP ID RCV Accession
Pancytopenia Likely pathogenic; Pathogenic rs2087581122 RCV001730751
TCN2-related disorder Likely pathogenic; Pathogenic rs2517903551, rs1198019350 RCV003400105
RCV003909040
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
RCV000000116
RCV000000118
RCV000000120
RCV003598065
RCV003598143
RCV003064652
RCV002611505
RCV003153007
RCV003495335
RCV003496105
RCV003496074
RCV003496302
RCV003496937
RCV003497066
RCV003494766
RCV003494767
RCV003495044
RCV003495667
RCV003598411
RCV003598913
RCV003598983
RCV003599017
RCV003599512
RCV003599640
RCV003599765
RCV003597662
RCV003597750
RCV003597933
RCV003598498
RCV003843073
RCV003766185
RCV000779371
RCV000537950
RCV005056230
RCV000815743
RCV000990420
RCV001041864
RCV001070797
RCV001055147
RCV001070249
RCV001035380
RCV001078181
RCV001212472
Unknown Diseases with uncertain, conflicting, or no pathogenic evidence in ClinVar
Phenotype Name Clinical Significance dbSNP ID RCV Accession
Acute myeloid leukemia Benign rs16988828 RCV005924877
Adrenocortical carcinoma, hereditary Benign; Likely benign rs9606756 RCV005897544
Cholangiocarcinoma Benign; Likely benign rs16988828, rs9606756 RCV005924879
RCV005897547
Gastric cancer Likely benign rs200303429 RCV005907386
Associations from Text MiningDisease associations identified through Pubtator
Disease Name Relationship Type References
Acidosis Associate 35488219
Adrenoleukodystrophy Associate 19353223
Anemia Megaloblastic Associate 14689755, 33023511
Asthma Stimulate 26547705
Cerebral Infarction Associate 21935458
Chagas Cardiomyopathy Associate 36508471
Chagas Disease Associate 36508471
Cleft Lip Associate 27604992, 31663440, 31663447
Cleft Palate Associate 25716564, 27604992, 31663447
Colorectal Neoplasms Associate 19936946, 26108676