TCF7L2

TCF7L2
Available structures PDB Ortholog search: PDBe RCSB List of PDB id codes 2GL7, 1JDH, 1JPW
Identifiers
Aliases	TCF7L2, TCF-4, TCF4, transcription factor 7 like 2
External IDs	OMIM: 602228 MGI: 1202879 HomoloGene: 7564 GeneCards: 6934
Genetically Related Diseases
Disease Name	References
diabetes mellitus type 2	[1]
bipolar disorder	[2]
breast cancer	[3]
coronary artery disease	[4]
metabolic disorder	[5]
colorectal cancer	[6]
Gene ontology Molecular function • sequence-specific DNA binding • DNA binding • beta-catenin binding • gamma-catenin binding • transcription factor activity, sequence-specific DNA binding • transcription factor binding • nuclear hormone receptor binding • RNA polymerase II core promoter proximal region sequence-specific DNA binding • protein binding • RNA polymerase II repressing transcription factor binding • armadillo repeat domain binding • transcription regulatory region DNA binding • protein kinase binding Cellular component • cytoplasm • beta-catenin-TCF7L2 complex • PML body • transcription factor complex • nucleoplasm • protein-DNA complex • nuclear chromatin • nucleus Biological process • positive regulation of heparan sulfate proteoglycan biosynthetic process • positive regulation of protein kinase B signaling • regulation of transcription, DNA-templated • glucose homeostasis • regulation of transcription from RNA polymerase II promoter • negative regulation of extrinsic apoptotic signaling pathway • negative regulation of transcription from RNA polymerase II promoter • response to glucose • Wnt signaling pathway • regulation of smooth muscle cell proliferation • negative regulation of sequence-specific DNA binding transcription factor activity • canonical Wnt signaling pathway involved in positive regulation of epithelial to mesenchymal transition • transcription, DNA-templated • positive regulation of protein export from nucleus • maintenance of DNA repeat elements • blood vessel development • myoblast fate commitment • cell cycle arrest • canonical Wnt signaling pathway • pancreas development • positive regulation of protein binding • regulation of hormone metabolic process • cell proliferation • negative regulation of transcription, DNA-templated • negative regulation of type B pancreatic cell apoptotic process • fat cell differentiation • negative regulation of canonical Wnt signaling pathway • positive regulation of transcription from RNA polymerase II promoter • positive regulation of insulin secretion Sources:Amigo / QuickGO
RNA expression pattern
More reference expression data
Orthologs
Species	Human	Mouse
Entrez	6934	21416
Ensembl	ENSG00000148737	ENSMUSG00000024985
UniProt	Q9NQB0	Q924A0
RefSeq (mRNA)	NM_001146274 NM_001146283 NM_001146284 NM_001146285 NM_001146286 NM_001198525 NM_001198526 NM_001198527 NM_001198528 NM_001198529 NM_001198530 NM_001198531 NM_030756	NM_001142918 NM_001142919 NM_001142920 NM_001142921 NM_001142922 NM_001142923 NM_001142924 NM_009333
RefSeq (protein)	NP_001139746.1 NP_001139755.1 NP_001139756.1 NP_001139758.1 NP_001185455.1 NP_001185457.1 NP_001185460.1 NP_001139757.1	NP_001136390.1 NP_001136393.1 NP_001136396.1
Location (UCSC)	Chr 10: 112.95 – 113.17 Mb	Chr 19: 55.74 – 55.93 Mb
PubMed search	[7]	[8]
Wikidata
View/Edit Human	View/Edit Mouse

Transcription factor 7-like 2 (T-cell specific, HMG-box) also known as TCF7L2 or TCF4 is a protein acting as a transcription factor. In humans this protein is encoded by the TCF7L2 gene. The single nucleotide polymorphism (SNP) within the TCF7L2 gene, rs7903146, is, to date, the most significant genetic marker associated with Type 2 diabetes mellitus (T2DM) risk. SNPs in this gene are linked to higher risk to develop type 2 diabetes, as well as gestational diabetes.

Structure of complex between TCF7L2 (orange), β-catenin (red), and BCL9 (brown).

Function

TCF7L2 is a transcription factor influencing the transcription of several genes thereby exerting a large variety of functions within the cell. It is a member of the Wnt signaling pathway. Stimulation of the pathway leads to the association of β-catenin with BCL9, translocation to the nucleus, and association with TCF7L2, which in turn results in the activation of Wnt target genes, specifically repressing proglucagon synthesis in enteroendocrine cells.

Clinical significance

TCF7L2 is implicated in a large variety of diseases. Several single nucleotide polymorphisms are associated with type 2 diabetes. In European populations it was found to be a major determinant of type 2 risk.

A frameshift mutation of TCF7L2 is implicated in colorectal cancer. Variants of the gene are most likely involved in many other cancer types.

Model organisms

Model organisms have been used in the study of TCF7L2 function. A conditional knockout mouse line called Tcf7l2^{tm1a(EUCOMM)Wtsi} was generated at the Wellcome Trust Sanger Institute. Male and female animals underwent a standardized phenotypic screen to determine the effects of deletion. Additional screens performed: - In-depth immunological phenotyping

Tcf7l2 knockout mouse phenotype

Characteristic	Phenotype
All data available at.
Insulin	Normal
Homozygous viability at P14	Abnormal
Recessive lethal study	Abnormal
Body weight	Normal
Neurological assessment	Normal
Grip strength	Normal
Dysmorphology	Normal
Indirect calorimetry	Normal
Glucose tolerance test	Normal
Auditory brainstem response	Normal
DEXA	Abnormal
Radiography	Normal
Eye morphology	Normal
Clinical chemistry	Normal
Haematology 16 Weeks	Normal
Peripheral blood leukocytes 16 Weeks	Normal
Epidermal Immune Composition	Normal
Influenza Challenge	Normal

Nomenclature

While TCF4 is sometimes misleadingly used as an alias symbol for TCF7L2, it is also the symbol officially approved by the HUGO Gene Nomenclature Committee for the transcription factor 4 gene.

See also

• TCF/LEF family

Further reading

• Segditsas S, Tomlinson I (2006). "Colorectal cancer and genetic alterations in the Wnt pathway". Oncogene 25 (57): 7531–7. doi:10.1038/sj.onc.1210059. PMID 17143297. 
• Florez JC (2007). "The new type 2 diabetes gene TCF7L2". Curr Opin Clin Nutr Metab Care 10 (4): 391–6. doi:10.1097/MCO.0b013e3281e2c9be. PMID 17563454. 
• Castrop J, van Norren K, Clevers H (1992). "A gene family of HMG-box transcription factors with homology to TCF-1". Nucleic Acids Res. 20 (3): 611. doi:10.1093/nar/20.3.611. PMC 310434. PMID 1741298. 
• Maruyama K, Sugano S (1994). "Oligo-capping: a simple method to replace the cap structure of eukaryotic mRNAs with oligoribonucleotides". Gene 138 (1-2): 171–4. doi:10.1016/0378-1119(94)90802-8. PMID 8125298. 
• Korinek V, et al. (1997). "Constitutive transcriptional activation by a beta-catenin-Tcf complex in APC-/- colon carcinoma". Science 275 (5307): 1784–7. doi:10.1126/science.275.5307.1784. PMID 9065401. 
• Suzuki Y, et al. (1997). "Construction and characterization of a full length-enriched and a 5'-end-enriched cDNA library". Gene 200 (1-2): 149–56. doi:10.1016/S0378-1119(97)00411-3. PMID 9373149. 
• He TC, et al. (1998). "Identification of c-MYC as a target of the APC pathway". Science 281 (5382): 1509–12. Bibcode:1998Sci...281.1509H. doi:10.1126/science.281.5382.1509. PMID 9727977. 
• Barker N, Huls G, Korinek V, Clevers H (1999). "Restricted high level expression of Tcf-4 protein in intestinal and mammary gland epithelium". Am. J. Pathol. 154 (1): 29–35. doi:10.1016/S0002-9440(10)65247-9. PMC 1853446. PMID 9916915. 
• Omer CA, Miller PJ, Diehl RE, Kral AM (1999). "Identification of Tcf4 residues involved in high-affinity beta-catenin binding". Biochem. Biophys. Res. Commun. 256 (3): 584–90. doi:10.1006/bbrc.1999.0379. PMID 10080941. 
• Giannini AL, Vivanco MM, Kypta RM (2000). "Analysis of beta-catenin aggregation and localization using GFP fusion proteins: nuclear import of alpha-catenin by the beta-catenin/Tcf complex". Exp. Cell Res. 255 (2): 207–20. doi:10.1006/excr.1999.4785. PMID 10694436. 
• Duval A, Busson-Leconiat M, Berger R, Hamelin R (2000). "Assignment of the TCF-4 gene (TCF7L2) to human chromosome band 10q25.3". Cytogenet. Cell Genet. 88 (3-4): 264–5. doi:10.1159/000015534. PMID 10828605. 
• Duval A, et al. (2000). "The human T-cell transcription factor-4 gene: structure, extensive characterization of alternative splicings, and mutational analysis in colorectal cancer cell lines". Cancer Res. 60 (14): 3872–9. PMID 10919662. 
• Brantjes H, Roose J, van De Wetering M, Clevers H (2001). "All Tcf HMG box transcription factors interact with Groucho-related co-repressors". Nucleic Acids Res. 29 (7): 1410–9. doi:10.1093/nar/29.7.1410. PMC 31284. PMID 11266540. 
• Palacino JJ, et al. (2001). "Presenilin 1 regulates beta-catenin-mediated transcription in a glycogen synthase kinase-3-independent fashion". J. Biol. Chem. 276 (42): 38563–9. doi:10.1074/jbc.M105376200. PMID 11504726. 
• Miravet S, et al. (2002). "The transcriptional factor Tcf-4 contains different binding sites for beta-catenin and plakoglobin". J. Biol. Chem. 277 (3): 1884–91. doi:10.1074/jbc.M110248200. PMID 11711551. 
• Graham TA, et al. (2001). "Tcf4 can specifically recognize beta-catenin using alternative conformations". Nat. Struct. Biol. 8 (12): 1048–52. doi:10.1038/nsb718. PMID 11713475. 
• Poy F, Lepourcelet M, Shivdasani RA, Eck MJ (2001). "Structure of a human Tcf4-beta-catenin complex". Nat. Struct. Biol. 8 (12): 1053–7. doi:10.1038/nsb720. PMID 11713476. 
• Thiele A, et al. (2001). "Regulation and possible function of beta-catenin in human monocytes". J. Immunol. 167 (12): 6786–93. doi:10.4049/jimmunol.167.12.6786. PMID 11739494. 
• Marchenko GN, Marchenko ND, Leng J, Strongin AY (2002). "Promoter characterization of the novel human matrix metalloproteinase-26 gene: regulation by the T-cell factor-4 implies specific expression of the gene in cancer cells of epithelial origin". Biochem. J. 363 (Pt 2): 253–62. doi:10.1042/0264-6021:3630253. PMC 1222473. PMID 11931652. 
• Leung JY, et al. (2002). "Activation of AXIN2 expression by beta-catenin-T cell factor. A feedback repressor pathway regulating Wnt signaling". J. Biol. Chem. 277 (24): 21657–65. doi:10.1074/jbc.M200139200. PMID 11940574. 

External links

• TCF7L2 here called TCF4 features on this Wnt pathway web site: Wnt signalling molecules TCFs
• Structure determination of TCF7L2: PDB entry 2GL7 and related publication on PubMed
• PubMed GeneRIFs (summaries of related scientific publications) - [9]
• Weizmann Institute GeneCard for TCF7L2