Transcription factor 3 (E2A immunoglobulin enhancer-binding factors E12/E47), also known as TCF3, is a protein that in humans is encoded by the TCF3gene.[1][2][3] TCF3 has been shown to directly enhance Hes1 (a well-known target of Notch signaling) expression.[4]
This gene encodes a member of the E protein (class I) family of helix-loop-helixtranscription factors. The 9aaTAD transactivation domains of E proteins and MLL are very similar and both bind to the KIX domain of general transcriptional mediator CBP.[5][6] E proteins activate transcription by binding to regulatory E-box sequences on target genes as heterodimers or homodimers, and are inhibited by heterodimerization with inhibitor of DNA-binding (class IV) helix-loop-helix proteins. E proteins play a critical role in lymphopoiesis, and the encoded protein is required for B and T lymphocyte development.[1]
This gene regulates many developmental patterning processes such as lymphocyte and central nervous system (CNS) development. E proteins are involved in the development of lymphocytes.[7] They initiate transcription by binding to regulatory E-box sequences on target genes.
Clinical significance
Deletion of this gene or diminished activity of the encoded protein may play a role in lymphoid malignancies. This gene is also involved in several chromosomal translocations that are associated with lymphoid malignancies including pre-B-cell acute lymphoblastic leukemia (t(1;19), with PBX1 and t(17;19), with HLF),[8] childhood leukemia (t(19;19), with TFPT) and acute leukemia (t(12;19), with ZNF384).[1]
↑Piskacek, S (2007). "Nine-amino-acid transactivation domain: Establishment and prediction utilities". Genomics. 89: 756–768. doi:10.1016/j.ygeno.2007.02.003. PMID17467953.
↑Piskacek, Martin; Vasku, A; Hajek, R; Knight, A (2015). "Shared structural features of the 9aaTAD family in complex with CBP". Mol Biosyst. 11: 844–851. doi:10.1039/c4mb00672k. PMID25564305.
↑ 10.010.110.2Bradney C, Hjelmeland M, Komatsu Y, Yoshida M, Yao TP, Zhuang Y (Jan 2003). "Regulation of E2A activities by histone acetyltransferases in B lymphocyte development". The Journal of Biological Chemistry. 278 (4): 2370–6. doi:10.1074/jbc.M211464200. PMID12435739.
↑Deed RW, Jasiok M, Norton JD (Apr 1998). "Lymphoid-specific expression of the Id3 gene in hematopoietic cells. Selective antagonism of E2A basic helix-loop-helix protein associated with Id3-induced differentiation of erythroleukemia cells". The Journal of Biological Chemistry. 273 (14): 8278–86. doi:10.1074/jbc.273.14.8278. PMID9525934.
↑ 13.013.113.2Langlands K, Yin X, Anand G, Prochownik EV (Aug 1997). "Differential interactions of Id proteins with basic-helix-loop-helix transcription factors". The Journal of Biological Chemistry. 272 (32): 19785–93. doi:10.1074/jbc.272.32.19785. PMID9242638.
↑Neufeld B, Grosse-Wilde A, Hoffmeyer A, Jordan BW, Chen P, Dinev D, Ludwig S, Rapp UR (Jul 2000). "Serine/Threonine kinases 3pK and MAPK-activated protein kinase 2 interact with the basic helix-loop-helix transcription factor E47 and repress its transcriptional activity". The Journal of Biological Chemistry. 275 (27): 20239–42. doi:10.1074/jbc.C901040199. PMID10781029.
↑Maleki SJ, Royer CA, Hurlburt BK (Jun 1997). "MyoD-E12 heterodimers and MyoD-MyoD homodimers are equally stable". Biochemistry. 36 (22): 6762–7. doi:10.1021/bi970262m. PMID9184158.
↑Chakraborty T, Martin JF, Olson EN (Sep 1992). "Analysis of the oligomerization of myogenin and E2A products in vivo using a two-hybrid assay system". The Journal of Biological Chemistry. 267 (25): 17498–501. PMID1325437.
↑El Ghouzzi V, Legeai-Mallet L, Aresta S, Benoist C, Munnich A, de Gunzburg J, Bonaventure J (Mar 2000). "Saethre-Chotzen mutations cause TWIST protein degradation or impaired nuclear location". Human Molecular Genetics. 9 (5): 813–9. doi:10.1093/hmg/9.5.813. PMID10749989.
↑Huggins GS, Chin MT, Sibinga NE, Lee SL, Haber E, Lee ME (Oct 1999). "Characterization of the mUBC9-binding sites required for E2A protein degradation". The Journal of Biological Chemistry. 274 (40): 28690–6. doi:10.1074/jbc.274.40.28690. PMID10497239.
Further reading
LeBrun DP (May 2003). "E2A basic helix-loop-helix transcription factors in human leukemia". Frontiers in Bioscience. 8 (1–3): s206–22. doi:10.2741/1030. PMID12700034.