Transcription factor AP-2 alpha (Activating enhancer binding Protein 2 alpha), also known as TFAP2A, is a protein that in humans is encoded by the TFAP2A gene.[1]
Contents
Function
The AP-2 alpha protein acts as a sequence-specific DNA-binding transcription factor recognizing and binding to the specific DNA sequence and recruiting transcription machinery. Its binding site is a GC-rich sequence that is present in the cis-regulatory regions of several viral and cellular genes.[2] AP2-alpha is a 52-kD retinoic acid-inducible and developmentally regulated activator of transcription that binds to a consensus DNA-binding sequence GCCNNNGGC in the SV40 and metallothionein promoters.[1]
AP-2 alpha is expressed in neural crest cell lineages with the highest levels of expression corresponding to early neural crest cells, suggesting that AP-2 alpha plays a role in their differentiation and development. Transcription factor AP-2 alpha is expressed in ectoderm and in neural-crest cells migrating from the cranial folds during closure of the neural tube in the mouse. Cranial neural crest cell provides patterning information for craniofacial morphogenesis and generate most of the skull bones and the cranial ganglia.[2][3][4][5]
AP-2 alpha knockout mice die perinatally with cranio-abdominoschisis and severe dysmorphogenesis of the face, skull, sensory organs, and cranial ganglia.[6] Homozygous knockout mice also have neural tube defects followed by craniofacial and body wall abnormalities.[7] In vivo gene delivery of AP-2 alpha suppressed spontaneous intestinal polyps in the Apc(Min/+) mouse.[8] AP-2 alpha also functions as a master regulator of multiple transcription factors in the mouse liver.[9]
In melanocytic cells TFAP2A gene expression may be regulated by MITF.[10]
Clinical significance
Mutations in the TFAP2A gene cause Branchio-oculo-facial syndrome often with a midline cleft lip.[11] In a family with branchio-oculo-facial syndrome (BOFS),[12] a 3.2-Mb deletion at chromosome 6p24.3 was detected.[13] Sequencing of candidate genes in that region in 4 additional unrelated BOFS patients revealed 4 different de novo missense mutations in the exons 4 and 5 of the TFAP2A gene.
A disruption of an AP-2 alpha binding site in an IRF6 enhancer is associated with cleft lip.[14] Mutations in IRF6 gene cause Van der Woude syndrome (VWS)[15] that is a rare mendelian clefting autossomal dominant disorder with lower lip pits in 85% of affected individuals.[16] The remaining 15% of individuals with Van der Woude syndrome show only cleft lip and/or cleft palate (CL/P) and are clinically indistinguishable from the common non syndromic CL/P. NSCL/P occur in approximately 1/700 live births and is one of the most common form of congenital abnormalities. A previous association study between SNPs in and around IRF6 and NSCL/P have shown significant results in different populations[17] and was independently replicated.[18][19][20][21]
A search of NSCL/P cases for potential regulatory elements for IRF6 gene was made aligning genomic sequences to a 500 Kb region encompassing IRF6 from 17 vertebrate species. Human sequence as reference and searched for multispecies conserved sequences (MCSs). Regions contained in introns 5’ and 3’ flanking IRF6 were screened by direct sequencing for potential causative variants in 184 NSCL/P cases. The rare allele of the SNP rs642961 showed a significant association with cleft lip cases. Analysis of transcription factor binding site analysis showed that the risk allele disrupt a binding site for AP-2 alpha.[14]
Mutations in the AP-2 alpha gene also cause branchio-oculo-facial syndrome,[13] which has overlapping features with Van der Woude syndrome such as orofacial clefting and occasional lip pits what make rs642961 a good candidate for an etiological variant. These findings show that IRF6 and AP-2 alpha are in the same developmental pathway and identify a variant in a regulatory region that contributes substantially to a common complex disorder.
Interactions
TFAP2A has been shown to interact with:
See also
References
- ^ a b "Entrez Gene: TFAP2A transcription factor AP-2 alpha (activating enhancer binding protein 2 alpha)".
- ^ a b Williams T, Tjian R (April 1991). "Analysis of the DNA-binding and activation properties of the human transcription factor AP-2". Genes & Development 5 (4): 670–82. doi:10.1101/gad.5.4.670. PMID 2010091.
- ^ Mitchell PJ, Wang C, Tjian R (September 1987). "Positive and negative regulation of transcription in vitro: enhancer-binding protein AP-2 is inhibited by SV40 T antigen". Cell 50 (6): 847–61. doi:10.1016/0092-8674(87)90512-5. PMID 3040262.
- ^ Williams T, Admon A, Lüscher B, Tjian R (December 1988). "Cloning and expression of AP-2, a cell-type-specific transcription factor that activates inducible enhancer elements". Genes & Development 2 (12A): 1557–69. doi:10.1101/gad.2.12a.1557. PMID 3063603.
- ^ Le Douarin NM, Ziller C, Couly GF (September 1993). "Patterning of neural crest derivatives in the avian embryo: in vivo and in vitro studies". Developmental Biology 159 (1): 24–49. doi:10.1006/dbio.1993.1219. PMID 8365563.
- ^ Schorle H, Meier P, Buchert M, Jaenisch R, Mitchell PJ (May 1996). "Transcription factor AP-2 essential for cranial closure and craniofacial development". Nature 381 (6579): 235–8. doi:10.1038/381235a0. PMID 8622765.
- ^ Zhang J, Hagopian-Donaldson S, Serbedzija G, Elsemore J, Plehn-Dujowich D, McMahon AP, Flavell RA, Williams T (May 1996). "Neural tube, skeletal and body wall defects in mice lacking transcription factor AP-2". Nature 381 (6579): 238–41. doi:10.1038/381238a0. PMID 8622766.
- ^ Li Q, Löhr CV, Dashwood RH (September 2009). "Activator protein 2alpha suppresses intestinal tumorigenesis in the Apc(min) mouse" 283 (1). pp. 36–42. doi:10.1016/j.canlet.2009.03.026. PMC 2713803. PMID 19376641.
- ^ Li Q, Luo C, Löhr CV, Dashwood RH (August 2011). "Activator protein-2α functions as a master regulator of multiple transcription factors in the mouse liver" 41 (8). pp. 776–83. doi:10.1111/j.1872-034X.2011.00827.x. PMID 21682828.
- ^ Hoek KS, Schlegel NC, Eichhoff OM et al. (2008). "Novel MITF targets identified using a two-step DNA microarray strategy". Pigment Cell Melanoma Res. 21 (6): 665–76. doi:10.1111/j.1755-148X.2008.00505.x. PMID 19067971.
- ^ Dixon MJ, Marazita ML, Beaty TH, Murray JC (2011). "Cleft lip and palate: understanding genetic and environmental influences". Nature Reviews Genetics (12): 167-178.
- ^ Online 'Mendelian Inheritance in Man' (OMIM) 113620
- ^ a b Milunsky JM, Maher TA, Zhao G, Roberts AE, Stalker HJ, Zori RT, Burch MN, Clemens M, Mulliken JB, Smith R, Lin AE (May 2008). "TFAP2A mutations result in branchio-oculo-facial syndrome". American Journal of Human Genetics 82 (5): 1171–7. doi:10.1016/j.ajhg.2008.03.005. PMC 2427243. PMID 18423521.
- ^ a b Rahimov F, Marazita ML, Visel A, Cooper ME, Hitchler MJ, Rubini M, Domann FE, Govil M, Christensen K, Bille C, Melbye M, Jugessur A, Lie RT, Wilcox AJ, Fitzpatrick DR, Green ED, Mossey PA, Little J, Steegers-Theunissen RP, Pennacchio LA, Schutte BC, Murray JC (November 2008). "Disruption of an AP-2 alpha binding site in an IRF6 enhancer is associated with cleft lip". Nature Genetics 40 (11): 1341–7. doi:10.1038/ng.242. PMC 2691688. PMID 18836445.
- ^ Online 'Mendelian Inheritance in Man' (OMIM) 119300
- ^ Kondo S, Schutte BC, Richardson RJ, Bjork BC, Knight AS, Watanabe Y, Howard E, de Lima RL, Daack-Hirsch S, Sander A, McDonald-McGinn DM, Zackai EH, Lammer EJ, Aylsworth AS, Ardinger HH, Lidral AC, Pober BR, Moreno L, Arcos-Burgos M, Valencia C, Houdayer C, Bahuau M, Moretti-Ferreira D, Richieri-Costa A, Dixon MJ, Murray JC (October 2002). "Mutations in IRF6 cause Van der Woude and popliteal pterygium syndromes". Nature Genetics 32 (2): 285–9. doi:10.1038/ng985. PMC 3169431. PMID 12219090.
- ^ Zucchero TM, Cooper ME, Maher BS, Daack-Hirsch S, Nepomuceno B, Ribeiro L, Caprau D, Christensen K, Suzuki Y, Machida J, Natsume N, Yoshiura K, Vieira AR, Orioli IM, Castilla EE, Moreno L, Arcos-Burgos M, Lidral AC, Field LL, Liu YE, Ray A, Goldstein TH, Schultz RE, Shi M, Johnson MK, Kondo S, Schutte BC, Marazita ML, Murray JC (August 2004). "Interferon regulatory factor 6 (IRF6) gene variants and the risk of isolated cleft lip or palate". The New England Journal of Medicine 351 (8): 769–80. doi:10.1056/NEJMoa032909. PMID 15317890.
- ^ Scapoli L, Palmieri A, Martinelli M, Pezzetti F, Carinci P, Tognon M, Carinci F (January 2005). "Strong evidence of linkage disequilibrium between polymorphisms at the IRF6 locus and nonsyndromic cleft lip with or without cleft palate, in an Italian population". American Journal of Human Genetics 76 (1): 180–3. doi:10.1086/427344. PMC 1196422. PMID 15558496.
- ^ Blanton SH, Cortez A, Stal S, Mulliken JB, Finnell RH, Hecht JT (September 2005). "Variation in IRF6 contributes to nonsyndromic cleft lip and palate". American Journal of Medical Genetics 137A (3): 259–62. doi:10.1002/ajmg.a.30887. PMID 16096995.
- ^ Ghassibé M, Bayet B, Revencu N, Verellen-Dumoulin C, Gillerot Y, Vanwijck R, Vikkula M (November 2005). "Interferon regulatory factor-6: a gene predisposing to isolated cleft lip with or without cleft palate in the Belgian population". European Journal of Human Genetics 13 (11): 1239–42. doi:10.1038/sj.ejhg.5201486. PMID 16132054.
- ^ Park JW, McIntosh I, Hetmanski JB, Jabs EW, Vander Kolk CA, Wu-Chou YH, Chen PK, Chong SS, Yeow V, Jee SH, Park BY, Fallin MD, Ingersoll R, Scott AF, Beaty TH (April 2007). "Association between IRF6 and nonsyndromic cleft lip with or without cleft palate in four populations". Genetics in Medicine : Official Journal of the American College of Medical Genetics 9 (4): 219–27. doi:10.1097/GIM.0b013e3180423cca. PMC 2846512. PMID 17438386.
- ^ Li Q, Dashwood RH (October 2004). "Activator protein 2alpha associates with adenomatous polyposis coli/beta-catenin and Inhibits beta-catenin/T-cell factor transcriptional activity in colorectal cancer cells". J. Biol. Chem. 279 (44): 45669–75. doi:10.1074/jbc.M405025200. PMC 2276578. PMID 15331612.
- ^ a b Bragança J, Eloranta JJ, Bamforth SD, Ibbitt JC, Hurst HC, Bhattacharya S (May 2003). "Physical and functional interactions among AP-2 transcription factors, p300/CREB-binding protein, and CITED2". J. Biol. Chem. 278 (18): 16021–9. doi:10.1074/jbc.M208144200. PMID 12586840.
- ^ Bragança J, Swingler T, Marques FI, Jones T, Eloranta JJ, Hurst HC, Shioda T, Bhattacharya S (March 2002). "Human CREB-binding protein/p300-interacting transactivator with ED-rich tail (CITED) 4, a new member of the CITED family, functions as a co-activator for transcription factor AP-2". J. Biol. Chem. 277 (10): 8559–65. doi:10.1074/jbc.M110850200. PMID 11744733.
- ^ Campillos M, García MA, Valdivieso F, Vázquez J (March 2003). "Transcriptional activation by AP-2alpha is modulated by the oncogene DEK". Nucleic Acids Res. 31 (5): 1571–5. doi:10.1093/nar/gkg247. PMC 149840. PMID 12595566.
- ^ Gaubatz S, Imhof A, Dosch R, Werner O, Mitchell P, Buettner R, Eilers M (April 1995). "Transcriptional activation by Myc is under negative control by the transcription factor AP-2". EMBO J. 14 (7): 1508–19. PMC 398238. PMID 7729426.
- ^ McPherson LA, Loktev AV, Weigel RJ (November 2002). "Tumor suppressor activity of AP2alpha mediated through a direct interaction with p53". J. Biol. Chem. 277 (47): 45028–33. doi:10.1074/jbc.M208924200. PMID 12226108.
Further reading
- Murphy JE, Keen JH (1992). "Recognition sites for clathrin-associated proteins AP-2 and AP-3 on clathrin triskelia". J. Biol. Chem. 267 (15): 10850–5. PMID 1587861.
- Gaynor RB, Muchardt C, Xia YR et al. (1991). "Localization of the gene for the DNA-binding protein AP-2 to human chromosome 6p22.3-pter". Genomics 10 (4): 1100–2. doi:10.1016/0888-7543(91)90209-W. PMID 1916817.
- Williams T, Tjian R (1991). "Characterization of a dimerization motif in AP-2 and its function in heterologous DNA-binding proteins". Science 251 (4997): 1067–71. doi:10.1126/science.1998122. PMID 1998122.
- Williams T, Tjian R (1991). "Analysis of the DNA-binding and activation properties of the human transcription factor AP-2". Genes Dev. 5 (4): 670–82. doi:10.1101/gad.5.4.670. PMID 2010091.
- Williams T, Admon A, Lüscher B, Tjian R (1989). "Cloning and expression of AP-2, a cell-type-specific transcription factor that activates inducible enhancer elements". Genes Dev. 2 (12A): 1557–69. doi:10.1101/gad.2.12a.1557. PMID 3063603.
- Bauer R, Imhof A, Pscherer A et al. (1994). "The genomic structure of the human AP-2 transcription factor". Nucleic Acids Res. 22 (8): 1413–20. doi:10.1093/nar/22.8.1413. PMC 307999. PMID 8190633.
- Buettner R, Kannan P, Imhof A et al. (1993). "An alternatively spliced mRNA from the AP-2 gene encodes a negative regulator of transcriptional activation by AP-2". Mol. Cell. Biol. 13 (7): 4174–85. PMC 359967. PMID 8321221.
- Williamson JA, Bosher JM, Skinner A et al. (1996). "Chromosomal mapping of the human and mouse homologues of two new members of the AP-2 family of transcription factors". Genomics 35 (1): 262–4. doi:10.1006/geno.1996.0351. PMID 8661133.
- Pirozzi G, McConnell SJ, Uveges AJ et al. (1997). "Identification of novel human WW domain-containing proteins by cloning of ligand targets". J. Biol. Chem. 272 (23): 14611–6. doi:10.1074/jbc.272.23.14611. PMID 9169421.
- Batsché E, Muchardt C, Behrens J et al. (1998). "RB and c-Myc activate expression of the E-cadherin gene in epithelial cells through interaction with transcription factor AP-2". Mol. Cell. Biol. 18 (7): 3647–58. PMC 108947. PMID 9632747.
- Mertens PR, Alfonso-Jaume MA, Steinmann K, Lovett DH (1999). "A synergistic interaction of transcription factors AP2 and YB-1 regulates gelatinase A enhancer-dependent transcription". J. Biol. Chem. 273 (49): 32957–65. doi:10.1074/jbc.273.49.32957. PMID 9830047.
- García MA, Campillos M, Marina A et al. (1999). "Transcription factor AP-2 activity is modulated by protein kinase A-mediated phosphorylation". FEBS Lett. 444 (1): 27–31. doi:10.1016/S0014-5793(99)00021-6. PMID 10037142.
- Rosenthal JA, Chen H, Slepnev VI et al. (1999). "The epsins define a family of proteins that interact with components of the clathrin coat and contain a new protein module". J. Biol. Chem. 274 (48): 33959–65. doi:10.1074/jbc.274.48.33959. PMID 10567358.
- Heicklen-Klein A, Ginzburg I (2000). "Tau promoter confers neuronal specificity and binds Sp1 and AP-2". J. Neurochem. 75 (4): 1408–18. doi:10.1046/j.1471-4159.2000.0751408.x. PMID 10987820.
- Nyormoi O, Wang Z, Doan D et al. (2001). "Transcription factor AP-2 alpha is preferentially cleaved by caspase 6 and degraded by proteasome during tumor necrosis factor alpha-induced apoptosis in breast cancer cells". Mol. Cell. Biol. 21 (15): 4856–67. doi:10.1128/MCB.21.15.4856-4867.2001. PMC 87191. PMID 11438643.
- Rao DS, Chang JC, Kumar PD et al. (2001). "Huntingtin interacting protein 1 Is a clathrin coat binding protein required for differentiation of late spermatogenic progenitors". Mol. Cell. Biol. 21 (22): 7796–806. doi:10.1128/MCB.21.22.7796-7806.2001. PMC 99949. PMID 11604514.
- Bragança J, Swingler T, Marques FI et al. (2002). "Human CREB-binding protein/p300-interacting transactivator with ED-rich tail (CITED) 4, a new member of the CITED family, functions as a co-activator for transcription factor AP-2". J. Biol. Chem. 277 (10): 8559–65. doi:10.1074/jbc.M110850200. PMID 11744733.
- Mertens PR, Steinmann K, Alfonso-Jaume MA et al. (2002). "Combinatorial interactions of p53, activating protein-2, and YB-1 with a single enhancer element regulate gelatinase A expression in neoplastic cells". J. Biol. Chem. 277 (28): 24875–82. doi:10.1074/jbc.M200445200. PMID 11973333.
- Eloranta JJ, Hurst HC (2002). "Transcription factor AP-2 interacts with the SUMO-conjugating enzyme UBC9 and is sumolated in vivo". J. Biol. Chem. 277 (34): 30798–804. doi:10.1074/jbc.M202780200. PMID 12072434.
- Ben-Zimra M, Koler M, Orly J (2003). "Transcription of cholesterol side-chain cleavage cytochrome P450 in the placenta: activating protein-2 assumes the role of steroidogenic factor-1 by binding to an overlapping promoter element". Mol. Endocrinol. 16 (8): 1864–80. doi:10.1210/me.2002-0056. PMID 12145340.
External links
- GeneReviews/NCBI/NIH/UW entry on Branchiooculofacial Syndrome
- TFAP2A protein, human at the US National Library of Medicine Medical Subject Headings (MeSH)
- FactorBook AP-2alpha
- TFAP2A human gene location in the UCSC Genome Browser.
- TFAP2A human gene details in the UCSC Genome Browser.
This article incorporates text from the United States National Library of Medicine, which is in the public domain.
|