Thyrotroph embryonic factor is a protein that in humans is encoded by the TEFgene.[1][2][3]
Thyrotroph embryonic factor (TEF), a transcription factor, is a member of the PAR (proline and acidic amino acid-rich) subfamily of basic region/leucine zipper (bZIP) transcription factors. It is expressed in a broad range of cells and tissues in adult animals, however, during embryonic development, TEF expression appears to be restricted to the developing anterior pituitary gland, coincident with the appearance of thyroid-stimulating hormone, beta (TSHB). Indeed, TEF can bind to, and transactivate the TSHB promoter. It shows homology (in the functional domains) with other members of the PAR-bZIP subfamily of transcription factors, which include albumin D box-binding protein (DBP), human hepatic leukemia factor (HLF) and chicken vitellogenin gene-binding protein (VBP); VBP is considered the chicken homologue of TEF. Different members of the subfamily can readily form heterodimers, and share DNA-binding, and transcriptional regulatory properties.[3]
References
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↑Inukai T, Inaba T, Dang J, Kuribara R, Ozawa K, Miyajima A, Wu W, Look AT, Arinobu Y, Iwasaki H, Akashi K, Kagami K, Goi K, Sugita K, Nakazawa S (May 2005). "TEF, an antiapoptotic bZIP transcription factor related to the oncogenic E2A-HLF chimera, inhibits cell growth by down-regulating expression of the common beta chain of cytokine receptors". Blood. 105 (11): 4437–44. doi:10.1182/blood-2004-08-2976. PMID15665112.
Drolet DW, Scully KM, Simmons DM, et al. (1991). "TEF, a transcription factor expressed specifically in the anterior pituitary during embryogenesis, defines a new class of leucine zipper proteins". Genes Dev. 5 (10): 1739–53. doi:10.1101/gad.5.10.1739. PMID1916262.
Hunger SP, Li S, Fall MZ, et al. (1996). "The proto-oncogene HLF and the related basic leucine zipper protein TEF display highly similar DNA-binding and transcriptional regulatory properties". Blood. 87 (11): 4607–17. PMID8639829.
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Krueger DA, Warner EA, Dowd DR (2000). "Involvement of thyrotroph embryonic factor in calcium-mediated regulation of gene expression". J. Biol. Chem. 275 (19): 14524–31. doi:10.1074/jbc.275.19.14524. PMID10799536.
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Ota T, Suzuki Y, Nishikawa T, et al. (2004). "Complete sequencing and characterization of 21,243 full-length human cDNAs". Nat. Genet. 36 (1): 40–5. doi:10.1038/ng1285. PMID14702039.
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