Free for academic non-profit institutions. Other users need a Commercial license

Aliases for TCN2 Gene

Aliases for TCN2 Gene

  • Transcobalamin 2 2 3 5
  • Transcobalamin II 2 3 4
  • Transcobalamin II; Macrocytic Anemia 2 3
  • Macrocytic Anemia 2 3
  • TC II 3 4
  • TC-2 3 4
  • TCII 3 4
  • TC2 3 4
  • Vitamin B12-Binding Protein 2 3
  • Transcobalamin-2 3
  • D22S676 3
  • D22S750 3
  • TC 3
  • II 3

External Ids for TCN2 Gene

Previous GeneCards Identifiers for TCN2 Gene

  • GC22P027699
  • GC22P029327
  • GC22P031002
  • GC22P013965

Summaries for TCN2 Gene

Entrez Gene Summary for TCN2 Gene

  • 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 cobalamin into cells. This protein and other mammalian cobalamin-binding proteins, such as transcobalamin I and gastric intrisic factor, may have evolved by duplication of a common ancestral gene. Alternative splicing results in multiple transcript variants.[provided by RefSeq, May 2010]

GeneCards Summary for TCN2 Gene

TCN2 (Transcobalamin 2) is a Protein Coding gene. Diseases associated with TCN2 include Transcobalamin Ii Deficiency and Transcobalamin Deficiency. Among its related pathways are Vitamin digestion and absorption and Metabolism. GO annotations related to this gene include cobalamin binding. An important paralog of this gene is TCN1.

UniProtKB/Swiss-Prot for TCN2 Gene

  • Primary vitamin B12-binding and transport protein. Delivers cobalamin to cells.

No data available for Tocris Summary , Gene Wiki entry , PharmGKB "VIP" Summary , fRNAdb sequence ontologies and piRNA Summary for TCN2 Gene

Genomics for TCN2 Gene

Regulatory Elements for TCN2 Gene

Enhancers for TCN2 Gene
GeneHancer Identifier Enhancer Score Enhancer Sources Gene-Enhancer Score TSS distance (kb) Number of Genes Away Size (kb) Transcription Factor Binding Sites within enhancer Gene Targets for Enhancer
GH22F030648 1.3 Ensembl ENCODE 24.1 +43.0 43048 2.2 ELF3 ZNF133 ZSCAN9 RAD21 ZNF366 FOS EGR2 SMARCC1 JUNB NR2F2 TCN2 PES1 ENSG00000223831 SLC35E4 ENSG00000250318 GC22P030639
GH22F030605 1.1 FANTOM5 ENCODE 17.9 +1.2 1233 5.5 PKNOX1 ARID4B SIN3A YY1 GLIS2 ZNF143 FOS ZNF263 SP5 JUNB TCN2 OSM SLC35E4 ENSG00000250318 SEC14L6 SMTN DUSP18 TBC1D10A CCDC157 SF3A1
GH22F030589 0.2 ENCODE 15.7 -15.4 -15439 2.8 PKNOX1 CREB3L1 WRNIP1 ARID4B SIN3A DMAP1 YY1 ZNF207 ZNF143 SP3 MORC2 TUG1 MGC20647 TCN2 PES1 SLC35E4 ENSG00000223831 GAL3ST1
GH22F030755 0.2 ENCODE 11.1 +148.7 148731 0.2 CTCF ZNF654 TRIM22 REST RAD21 NFYB SMC3 ZNF143 SLC35E4 DUSP18 PES1 TCN2 ENSG00000223831 GAL3ST1 INPP5J SELENOM MIR3200 LOC105372994
GH22F030944 0.5 ENCODE 10.1 +340.0 339951 3.6 ELF3 SIN3A ZSCAN9 RAD21 ZNF335 GLIS2 RCOR1 EGR2 PAF1 ZNF654 MORC2-AS1 MORC2 TUG1 SMTN PES1 TCN2 ENSG00000223831 OSBP2 PIR35344
- Elite enhancer/Elite enhancer-gene association Download Table
Download GeneHancer data dump

Enhancers around TCN2 on UCSC Golden Path with GeneCards custom track

Promoters for TCN2 Gene
Ensembl Regulatory Elements (ENSRs) TSS Distance (bp) Size (bp) Binding Sites for Transcription Factors within promoters
ENSR00000169918 -38 1201 ELF3 HDAC1 ARID4B SIN3A SP5 USF2 REST NR2F2 TGIF2 RAD51

Genomic Location for TCN2 Gene

30,606,838 bp from pter
30,627,278 bp from pter
20,441 bases
Plus strand

Genomic View for TCN2 Gene

Genes around TCN2 on UCSC Golden Path with GeneCards custom track

Cytogenetic band:
TCN2 Gene in genomic location: bands according to Ensembl, locations according to GeneLoc (and/or Entrez Gene and/or Ensembl if different)
Genomic Location for TCN2 Gene
GeneLoc Logo Genomic Neighborhood Exon StructureGene Density

RefSeq DNA sequence for TCN2 Gene

Proteins for TCN2 Gene

  • Protein details for TCN2 Gene (UniProtKB/Swiss-Prot)

    Protein Symbol:
    Recommended name:
    Protein Accession:
    Secondary Accessions:
    • Q96FD4
    • Q9BVI8
    • Q9UCI5
    • Q9UCI6
    • Q9UDM0

    Protein attributes for TCN2 Gene

    427 amino acids
    Molecular mass:
    47535 Da
    Quaternary structure:
    No Data Available

    Three dimensional structures from OCA and Proteopedia for TCN2 Gene

    Alternative splice isoforms for TCN2 Gene


neXtProt entry for TCN2 Gene

Post-translational modifications for TCN2 Gene

No Post-translational modifications

Other Protein References for TCN2 Gene

Antibody Products

  • R&D Systems Antibodies for TCN2 (Transcobalamin II)
  • Abcam antibodies for TCN2

No data available for DME Specific Peptides for TCN2 Gene

Domains & Families for TCN2 Gene

Suggested Antigen Peptide Sequences for TCN2 Gene

GenScript: Design optimal peptide antigens:

Graphical View of Domain Structure for InterPro Entry



  • Belongs to the eukaryotic cobalamin transport proteins family.
  • Belongs to the eukaryotic cobalamin transport proteins family.
genes like me logo Genes that share domains with TCN2: view

No data available for Gene Families for TCN2 Gene

Function for TCN2 Gene

Molecular function for TCN2 Gene

GENATLAS Biochemistry:
transcobalamin II,plasma protein vitamin B12 binding
UniProtKB/Swiss-Prot Function:
Primary vitamin B12-binding and transport protein. Delivers cobalamin to cells.

Gene Ontology (GO) - Molecular Function for TCN2 Gene

GO ID Qualified GO term Evidence PubMed IDs
GO:0031419 cobalamin binding IEA,IDA 16537422
GO:0046872 metal ion binding IEA --
genes like me logo Genes that share ontologies with TCN2: view
genes like me logo Genes that share phenotypes with TCN2: view

Human Phenotype Ontology for TCN2 Gene

HPO Id HPO Name Alternative Ids Definition Synonyms

Animal Model Products

Inhibitory RNA Products

Flow Cytometry Products

No data available for Enzyme Numbers (IUBMB) , Animal Models , Transcription Factor Targets and HOMER Transcription for TCN2 Gene

Localization for TCN2 Gene

Subcellular locations from UniProtKB/Swiss-Prot for TCN2 Gene


Subcellular locations from

Jensen Localization Image for TCN2 Gene COMPARTMENTS Subcellular localization image for TCN2 gene
Compartment Confidence
extracellular 5
lysosome 5
vacuole 5
endosome 4
cytosol 3
mitochondrion 2
plasma membrane 2
endoplasmic reticulum 1
nucleus 1
peroxisome 1

Gene Ontology (GO) - Cellular Components for TCN2 Gene

GO ID Qualified GO term Evidence PubMed IDs
GO:0005576 extracellular region TAS --
GO:0005615 extracellular space IEA,TAS --
GO:0005768 endosome TAS --
GO:0043202 lysosomal lumen TAS --
GO:0070062 extracellular exosome IDA 23376485
genes like me logo Genes that share ontologies with TCN2: view

Pathways & Interactions for TCN2 Gene

genes like me logo Genes that share pathways with TCN2: view

Interacting Proteins for TCN2 Gene

Gene Ontology (GO) - Biological Process for TCN2 Gene

GO ID Qualified GO term Evidence PubMed IDs
GO:0006810 transport IEA --
GO:0006811 ion transport IEA --
GO:0006824 cobalt ion transport IEA --
GO:0009235 cobalamin metabolic process TAS --
GO:0015889 cobalamin transport IEA --
genes like me logo Genes that share ontologies with TCN2: view

No data available for SIGNOR curated interactions for TCN2 Gene

Drugs & Compounds for TCN2 Gene

(13) Drugs for TCN2 Gene - From: DrugBank, HMDB, and Novoseek

Name Status Disease Links Group Role Mechanism of Action Clinical Trials
Cyanocobalamin Approved Nutra Transporter, substrate 249
Hydroxocobalamin Approved Pharma Carrier, substrate 248
Cobalamin Nutra 249
Cobalt Pharma 165

(6) Additional Compounds for TCN2 Gene - From: Novoseek

Name Synonyms Role CAS Number PubChem IDs PubMed IDs
genes like me logo Genes that share compounds with TCN2: view

Transcripts for TCN2 Gene

Unigene Clusters for TCN2 Gene

Transcobalamin II:
Representative Sequences:

Inhibitory RNA Products

Flow Cytometry Products

Alternative Splicing Database (ASD) splice patterns (SP) for TCN2 Gene

ExUns: 1a · 1b ^ 2 ^ 3a · 3b ^ 4 ^ 5a · 5b ^ 6 ^ 7 ^ 8 ^ 9
SP2: -

Relevant External Links for TCN2 Gene

GeneLoc Exon Structure for
ECgene alternative splicing isoforms for

Expression for TCN2 Gene

mRNA expression in normal human tissues for TCN2 Gene

mRNA expression in embryonic tissues and stem cells from LifeMap Discovery

mRNA differential expression in normal tissues according to GTEx for TCN2 Gene

This gene is overexpressed in Kidney - Cortex (x5.1).

Protein differential expression in normal tissues from HIPED for TCN2 Gene

This gene is overexpressed in Cerebrospinal fluid (40.7) and Neutrophil (18.5).

Integrated Proteomics: protein expression in normal tissues and cell lines from ProteomicsDB, PaxDb, and MOPED for TCN2 Gene

Protein tissue co-expression partners for TCN2 Gene

NURSA nuclear receptor signaling pathways regulating expression of TCN2 Gene:


SOURCE GeneReport for Unigene cluster for TCN2 Gene:

genes like me logo Genes that share expression patterns with TCN2: view

Primer Products

No data available for mRNA Expression by UniProt/SwissProt for TCN2 Gene

Orthologs for TCN2 Gene

This gene was present in the common ancestor of chordates.

Orthologs for TCN2 Gene

Organism Taxonomy Gene Similarity Type Details
(Pan troglodytes)
Mammalia TCN2 34 35
  • 98.91 (n)
(Canis familiaris)
Mammalia TCN2 34 35
  • 82.31 (n)
(Bos Taurus)
Mammalia TCN2 34 35
  • 79.22 (n)
(Rattus norvegicus)
Mammalia Tcn2 34
  • 78.12 (n)
(Mus musculus)
Mammalia Tcn2 34 16 35
  • 78.06 (n)
(Monodelphis domestica)
Mammalia TCN2 35
  • 53 (a)
(Ornithorhynchus anatinus)
Mammalia TCN2 35
  • 47 (a)
(Gallus gallus)
Aves TCN2 34 35
  • 56.02 (n)
(Anolis carolinensis)
Reptilia TCN2 35
  • 39 (a)
tropical clawed frog
(Silurana tropicalis)
Amphibia tcn2 34
  • 51.36 (n)
(Danio rerio)
Actinopterygii tcn2l 34 35
  • 48.84 (n)
sea squirt
(Ciona savignyi)
Ascidiacea -- 35
  • 24 (a)
Species where no ortholog for TCN2 was found in the sources mined by GeneCards:
  • A. gosspyii yeast (Ashbya gossypii)
  • Actinobacteria (Mycobacterium tuberculosis)
  • African clawed frog (Xenopus laevis)
  • African malaria mosquito (Anopheles gambiae)
  • Alicante grape (Vitis vinifera)
  • alpha proteobacteria (Wolbachia pipientis)
  • amoeba (Dictyostelium discoideum)
  • Archea (Pyrococcus horikoshii)
  • baker's yeast (Saccharomyces cerevisiae)
  • barley (Hordeum vulgare)
  • beta proteobacteria (Neisseria meningitidis)
  • bread mold (Neurospora crassa)
  • Chromalveolata (Phytophthora infestans)
  • common water flea (Daphnia pulex)
  • corn (Zea mays)
  • E. coli (Escherichia coli)
  • filamentous fungi (Aspergillus nidulans)
  • Firmicute bacteria (Streptococcus pneumoniae)
  • fission yeast (Schizosaccharomyces pombe)
  • fruit fly (Drosophila melanogaster)
  • green algae (Chlamydomonas reinhardtii)
  • honey bee (Apis mellifera)
  • K. lactis yeast (Kluyveromyces lactis)
  • loblloly pine (Pinus taeda)
  • malaria parasite (Plasmodium falciparum)
  • medicago trunc (Medicago Truncatula)
  • moss (Physcomitrella patens)
  • orangutan (Pongo pygmaeus)
  • pig (Sus scrofa)
  • rainbow trout (Oncorhynchus mykiss)
  • rice (Oryza sativa)
  • rice blast fungus (Magnaporthe grisea)
  • schistosome parasite (Schistosoma mansoni)
  • sea anemone (Nematostella vectensis)
  • sea urchin (Strongylocentrotus purpuratus)
  • sorghum (Sorghum bicolor)
  • soybean (Glycine max)
  • stem rust fungus (Puccinia graminis)
  • sugarcane (Saccharum officinarum)
  • thale cress (Arabidopsis thaliana)
  • tomato (Lycopersicon esculentum)
  • toxoplasmosis (Toxoplasma gondii)
  • Trichoplax (Trichoplax adhaerens)
  • wheat (Triticum aestivum)
  • worm (Caenorhabditis elegans)

Evolution for TCN2 Gene

Gene Tree for TCN2 (if available)
Gene Tree for TCN2 (if available)

Paralogs for TCN2 Gene

Paralogs for TCN2 Gene

genes like me logo Genes that share paralogs with TCN2: view

Variants for TCN2 Gene

Polymorphic Variants from UniProtKB/Swiss-Prot for TCN2 Gene

Pro/Arg-259 polymorphism affects TCN2 plasma concentration and may interfere in vitamin B(12) cellular availability and homocysteine metabolism (PubMed:11159542).

Sequence variations from dbSNP and Humsavar for TCN2 Gene

SNP ID Clin Chr 22 pos Sequence Context AA Info Type
rs372866837 Pathogenic 30,615,125(+) CAAGG(A/G)AAGTC intron-variant
rs606231119 Pathogenic 30,613,044(+) ATTGG(G/T)GAGCA intron-variant, splice-donor-variant
rs794728001 Pathogenic 30,615,774(+) GACTG(-/TCTG)GCACC reference, frameshift-variant
rs796064506 Pathogenic 30,615,771(+) CCAGA(-/CTGT)CTGGC reference, frameshift-variant
rs1801198 Benign 30,615,623(+) CATGC(C/G)TGGGG reference, missense

Structural Variations from Database of Genomic Variants (DGV) for TCN2 Gene

Variant ID Type Subtype PubMed ID
esv1367588 CNV insertion 17803354
esv3647564 CNV loss 21293372
nsv1110864 OTHER inversion 24896259
nsv1133313 CNV tandem duplication 24896259
nsv1136668 CNV deletion 24896259
nsv829171 CNV loss 20364138
nsv834175 CNV gain 17160897

Variation tolerance for TCN2 Gene

Residual Variation Intolerance Score: 95.5% of all genes are more intolerant (likely to be disease-causing)
Gene Damage Index Score: 8.06; 84.38% of all genes are more intolerant (likely to be disease-causing)

Relevant External Links for TCN2 Gene

Human Gene Mutation Database (HGMD)
SNPedia medical, phenotypic, and genealogical associations of SNPs for

Disorders for TCN2 Gene

MalaCards: The human disease database

(22) MalaCards diseases for TCN2 Gene - From: OMIM, ClinVar, GeneTests, Orphanet, DISEASES, Novoseek, and GeneCards

Disorder Aliases PubMed IDs
transcobalamin ii deficiency
  • tcn2 deficiency
transcobalamin deficiency
  • transcobalamin ii deficiency
vitamin b12 deficiency
  • cobalamin deficiency
  • infection by fasciolopsis buski
vitamin metabolic disorder
- elite association - COSMIC cancer census association via MalaCards
Search TCN2 in MalaCards View complete list of genes associated with diseases


  • Transcobalamin II deficiency (TCN2 deficiency) [MIM:275350]: Results in various forms of anemia. Note=The disease is caused by mutations affecting the gene represented in this entry.

Genatlas disease for TCN2 Gene

anemia,megalobastic,severe with thrombocytopenia and neutropenia,methylmalonic acidemia and homocystinuria

Relevant External Links for TCN2

Genetic Association Database (GAD)
Human Genome Epidemiology (HuGE) Navigator
Atlas of Genetics and Cytogenetics in Oncology and Haematology:
genes like me logo Genes that share disorders with TCN2: view

Publications for TCN2 Gene

  1. Association of homocysteine (but not of MTHFR 677 C>T, MTR 2756 A>G, MTRR 66 A>G and TCN2 776 C>G) with ischaemic cerebrovascular disease in Sicily. (PMID: 16894458) Bosco P. … GuAcant J.L. (Thromb. Haemost. 2006) 3 22 25 46 64
  2. The cloning and characterization of the human transcobalamin II gene. (PMID: 7742531) Regec A. … Rothenberg S.P. (Blood 1995) 2 3 4 22 64
  3. The cDNA sequence and the deduced amino acid sequence of human transcobalamin II show homology with rat intrinsic factor and human transcobalamin I. (PMID: 1708393) Platica O. … Rothenberg S.P. (J. Biol. Chem. 1991) 2 3 4 22 64
  4. Variations in folate pathway genes are associated with unexplained female infertility. (PMID: 19324355) AltmAoe S. … Nilsson T.K. (Fertil. Steril. 2010) 3 22 46 64
  5. Survey and biological insights of pemetrexed-related therapeutic improvement in mesothelioma: The Nancy Centre of Biological Resources' Mesothelioma Cohort. (PMID: 19546821) Vlastos F. … Martinet N. (J Thorac Oncol 2009) 3 22 46 64

Products for TCN2 Gene

Sources for TCN2 Gene

Loading form....