The tumor suppressor protein menin interacts with NF-[kappa]B proteins and inhibits NF-[kappa]B-mediated transactivation
Multiple endocrine neoplasia type 1 is an autosomal dominant tumor syndrome. Manifestations include neoplasms of the parathyroid glands, enteropancreatic neuroendocrine cells, and the anterior pituitary gland. The MEN1 tumor suppressor gene encodes menin, a 610 amino acid nuclear protein without seq...
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Veröffentlicht in: | Oncogene 2001-08, Vol.20 (36), p.4917 |
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creator | Heppner, Christina Bilimoria, Karl Y Agarwal, Sunita K Kester, MaryBeth Whitty, Leslie J Guru, Siradanahalli C Chandrasekharappa, Settara C Collins, Francis S Spiegel, Allen M Marx, Stephen J A Lee Burns |
description | Multiple endocrine neoplasia type 1 is an autosomal dominant tumor syndrome. Manifestations include neoplasms of the parathyroid glands, enteropancreatic neuroendocrine cells, and the anterior pituitary gland. The MEN1 tumor suppressor gene encodes menin, a 610 amino acid nuclear protein without sequence homology to other proteins. To elucidate menin function, we used immunoprecipitation to identify interacting proteins. The NF-kappaB proteins p50, p52 and p65 were found to interact specifically and directly with menin in vitro and in vivo. The region of NF-kappaB proteins sufficient for binding to menin is the N-terminus. Furthermore, amino acids 305-381 of menin are essential for this binding. Menin represses p65-mediated transcriptional activation on NF-kappaB sites in a dose-dependent and specific manner. Also, PMA (phorbol 12-myristate 13-acetate)-stimulated NF-kappaB activation is suppressed by menin. These observations suggest that menin's ability to interact with NF-kappaB proteins and its modulation of NF-kappaB transactivation contribute to menin's tumor suppressor function. |
doi_str_mv | 10.1038/sj.onc.1204529 |
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Manifestations include neoplasms of the parathyroid glands, enteropancreatic neuroendocrine cells, and the anterior pituitary gland. The MEN1 tumor suppressor gene encodes menin, a 610 amino acid nuclear protein without sequence homology to other proteins. To elucidate menin function, we used immunoprecipitation to identify interacting proteins. The NF-kappaB proteins p50, p52 and p65 were found to interact specifically and directly with menin in vitro and in vivo. The region of NF-kappaB proteins sufficient for binding to menin is the N-terminus. Furthermore, amino acids 305-381 of menin are essential for this binding. Menin represses p65-mediated transcriptional activation on NF-kappaB sites in a dose-dependent and specific manner. Also, PMA (phorbol 12-myristate 13-acetate)-stimulated NF-kappaB activation is suppressed by menin. 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Manifestations include neoplasms of the parathyroid glands, enteropancreatic neuroendocrine cells, and the anterior pituitary gland. The MEN1 tumor suppressor gene encodes menin, a 610 amino acid nuclear protein without sequence homology to other proteins. To elucidate menin function, we used immunoprecipitation to identify interacting proteins. The NF-kappaB proteins p50, p52 and p65 were found to interact specifically and directly with menin in vitro and in vivo. The region of NF-kappaB proteins sufficient for binding to menin is the N-terminus. Furthermore, amino acids 305-381 of menin are essential for this binding. Menin represses p65-mediated transcriptional activation on NF-kappaB sites in a dose-dependent and specific manner. Also, PMA (phorbol 12-myristate 13-acetate)-stimulated NF-kappaB activation is suppressed by menin. These observations suggest that menin's ability to interact with NF-kappaB proteins and its modulation of NF-kappaB transactivation contribute to menin's tumor suppressor function.</abstract><cop>New York</cop><pub>Nature Publishing Group</pub><doi>10.1038/sj.onc.1204529</doi></addata></record> |
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title | The tumor suppressor protein menin interacts with NF-[kappa]B proteins and inhibits NF-[kappa]B-mediated transactivation |
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