MEF2C

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Species	Human	Mouse
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Myocyte-specific enhancer factor 2C also known as MADS box transcription enhancer factor 2, polypeptide C is a protein that in humans is encoded by the MEF2C gene. MEF2C is a transcription factor in the Mef2 family.

Genomics

The gene is located at 5q14.3 on the minus (Crick) strand and is 200,723 bases in length. The encoded protein has 473 amino acids with a predicted molecular weight of 51.221 kiloDaltons. Three isoforms have been identified. Several post translational modifications have been identified including phosphorylation on serine-59 and serine-396, sumoylation on lysine-391, acetylation on lysine-4 and proteolytic cleavage.

Interactions

MEF2C has been shown to interact with:

• EP300,
• HDAC4, HDAC7, HDAC9,
• MAPK7,
• SOX18
• SP1, and
• TEAD1.

Biological significance

This gene is involved in cardiac morphogenesis and myogenesis and vascular development. It may also be involved in neurogenesis and in the development of cortical architecture. Mice without a functional copy of the Mef2c gene die before birth and have abnormalities in the heart and vascular system. It is one of the targets of an oncomiR, MIRN21.

In humans mutations of this gene result in autosomal dominant mental retardation 20 (MRD20), characterised by severe psychomotor impairment, periodic tremor and an abnormal motor pattern with mirror movement of the upper limbs observed during infancy, hypotonia, abnormal EEG, epilepsy, absence of speech, autistic behavior, bruxism, and mild dysmorphic features, mild thinning of the corpus callosum and delay of white matter myelination in the occipital lobes

MEF2C-binding site is associated with minor allele of SNP rs630923, associated with the risk of multiple sclerosis, and responsible for reduced CXCR5 gene promoter activity in B-cells during activation, that could lead to decreased autoimmune response

See also

• Mef2

Further reading

• Leifer D, Krainc D, Yu YT, McDermott J, Breitbart RE, Heng J, Neve RL, Kosofsky B, Nadal-Ginard B, Lipton SA (Feb 1993). "MEF2C, a MADS/MEF2-family transcription factor expressed in a laminar distribution in cerebral cortex". Proceedings of the National Academy of Sciences of the United States of America. 90 (4): 1546–50. doi:10.1073/pnas.90.4.1546. PMC 45911. PMID 7679508.
• Hobson GM, Krahe R, Garcia E, Siciliano MJ, Funanage VL (Oct 1995). "Regional chromosomal assignments for four members of the MADS domain transcription enhancer factor 2 (MEF2) gene family to human chromosomes 15q26, 19p12, 5q14, and 1q12-q23". Genomics. 29 (3): 704–11. doi:10.1006/geno.1995.9007. PMID 8575763.
• Krainc D, Haas M, Ward DC, Lipton SA, Bruns G, Leifer D (Oct 1995). "Assignment of human myocyte-specific enhancer binding factor 2C (hMEF2C) to human chromosome 5q14 and evidence that MEF2C is evolutionarily conserved". Genomics. 29 (3): 809–11. doi:10.1006/geno.1995.9927. PMID 8575784.
• Molkentin JD, Li L, Olson EN (Jul 1996). "Phosphorylation of the MADS-Box transcription factor MEF2C enhances its DNA binding activity". The Journal of Biological Chemistry. 271 (29): 17199–204. doi:10.1074/jbc.271.29.17199. PMID 8663403.
• Black BL, Ligon KL, Zhang Y, Olson EN (Oct 1996). "Cooperative transcriptional activation by the neurogenic basic helix-loop-helix protein MASH1 and members of the myocyte enhancer factor-2 (MEF2) family". The Journal of Biological Chemistry. 271 (43): 26659–63. doi:10.1074/jbc.271.43.26659. PMID 8900141.
• Gradwohl G, Fode C, Guillemot F (Nov 1996). "Restricted expression of a novel murine atonal-related bHLH protein in undifferentiated neural precursors". Developmental Biology. 180 (1): 227–41. doi:10.1006/dbio.1996.0297. PMID 8948587.
• Sartorelli V, Huang J, Hamamori Y, Kedes L (Feb 1997). "Molecular mechanisms of myogenic coactivation by p300: direct interaction with the activation domain of MyoD and with the MADS box of MEF2C". Molecular and Cellular Biology. 17 (2): 1010–26. doi:10.1128/mcb.17.2.1010. PMC 231826. PMID 9001254.
• Han J, Jiang Y, Li Z, Kravchenko VV, Ulevitch RJ (Mar 1997). "Activation of the transcription factor MEF2C by the MAP kinase p38 in inflammation". Nature. 386 (6622): 296–9. doi:10.1038/386296a0. PMID 9069290.
• Kato Y, Kravchenko VV, Tapping RI, Han J, Ulevitch RJ, Lee JD (Dec 1997). "BMK1/ERK5 regulates serum-induced early gene expression through transcription factor MEF2C". The EMBO Journal. 16 (23): 7054–66. doi:10.1093/emboj/16.23.7054. PMC 1170308. PMID 9384584.
• Krainc D, Bai G, Okamoto S, Carles M, Kusiak JW, Brent RN, Lipton SA (Oct 1998). "Synergistic activation of the N-methyl-D-aspartate receptor subunit 1 promoter by myocyte enhancer factor 2C and Sp1". The Journal of Biological Chemistry. 273 (40): 26218–24. doi:10.1074/jbc.273.40.26218. PMID 9748305.
• Yang CC, Ornatsky OI, McDermott JC, Cruz TF, Prody CA (Oct 1998). "Interaction of myocyte enhancer factor 2 (MEF2) with a mitogen-activated protein kinase, ERK5/BMK1". Nucleic Acids Research. 26 (20): 4771–7. doi:10.1093/nar/26.20.4771. PMC 147902. PMID 9753748.
• Swanson BJ, Jäck HM, Lyons GE (Jun 1998). "Characterization of myocyte enhancer factor 2 (MEF2) expression in B and T cells: MEF2C is a B cell-restricted transcription factor in lymphocytes". Molecular Immunology. 35 (8): 445–58. doi:10.1016/S0161-5890(98)00058-3. PMID 9798649.
• Zhao M, New L, Kravchenko VV, Kato Y, Gram H, di Padova F, Olson EN, Ulevitch RJ, Han J (Jan 1999). "Regulation of the MEF2 family of transcription factors by p38". Molecular and Cellular Biology. 19 (1): 21–30. doi:10.1128/mcb.19.1.21. PMC 83862. PMID 9858528.
• Wilson-Rawls J, Molkentin JD, Black BL, Olson EN (Apr 1999). "Activated notch inhibits myogenic activity of the MADS-Box transcription factor myocyte enhancer factor 2C". Molecular and Cellular Biology. 19 (4): 2853–62. doi:10.1128/mcb.19.4.2853. PMC 84078. PMID 10082551.
• Yang SH, Galanis A, Sharrocks AD (Jun 1999). "Targeting of p38 mitogen-activated protein kinases to MEF2 transcription factors". Molecular and Cellular Biology. 19 (6): 4028–38. doi:10.1128/mcb.19.6.4028. PMC 104362. PMID 10330143.
• Wang AH, Bertos NR, Vezmar M, Pelletier N, Crosato M, Heng HH, Th'ng J, Han J, Yang XJ (Nov 1999). "HDAC4, a human histone deacetylase related to yeast HDA1, is a transcriptional corepressor". Molecular and Cellular Biology. 19 (11): 7816–27. doi:10.1128/mcb.19.11.7816. PMC 84849. PMID 10523670.
• Lu J, McKinsey TA, Nicol RL, Olson EN (Apr 2000). "Signal-dependent activation of the MEF2 transcription factor by dissociation from histone deacetylases". Proceedings of the National Academy of Sciences of the United States of America. 97 (8): 4070–5. doi:10.1073/pnas.080064097. PMC 18151. PMID 10737771.
• Morin S, Charron F, Robitaille L, Nemer M (May 2000). "GATA-dependent recruitment of MEF2 proteins to target promoters". The EMBO Journal. 19 (9): 2046–55. doi:10.1093/emboj/19.9.2046. PMC 305697. PMID 10790371.
• Wu Z, Woodring PJ, Bhakta KS, Tamura K, Wen F, Feramisco JR, Karin M, Wang JY, Puri PL (Jun 2000). "p38 and extracellular signal-regulated kinases regulate the myogenic program at multiple steps". Molecular and Cellular Biology. 20 (11): 3951–64. doi:10.1128/MCB.20.11.3951-3964.2000. PMC 85749. PMID 10805738.

External links

• MEF2C+protein,+human at the US National Library of Medicine Medical Subject Headings (MeSH)
• FactorBook MEF2C