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Department of Biochemistry and Molecular Biology, Cancer Research Institute, Seoul National University College of Medicine, Seoul 110-799, Republic of Korea [H. K., J-E. L., H-D. Y.]; College of Pharmacy, Sungkyunkwan University, Suwon, 440-746 Republic of Korea [E-J. C.]; and Department of Pharmacology and Department of Neuroscience, Johns Hopkins University School of Medicine, Baltimore, Maryland 21205 [J. O. L.]
Menin, a gene product of multiple endocrine neoplasia type I (MEN1), is known to act as a tumor suppressor to repress JunD transcription factor. However, the mechanism by which Menin represses JunD transcriptional activity was still unclear. In this study, we found that Menin is a corepressor against JunD transcriptional activity via recruitment of histone deacetylases in an mSin3A-dependent manner. The amino acid search revealed that central domain of Menin includes a
-helical mSin3-interacting domain [SID (371387)]. The SID mutation of Menin (L381P/A385P) abolished the interaction between mSin3A and paired amphipathic helix 2 domain of Menin and reduced its ability to repress JunD transcriptional activity, implicating that SID of Menin is important for recruiting an mSin3A-histone deacetylase complex to repress JunD transcriptional activity.
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A. Yokoyama, Z. Wang, J. Wysocka, M. Sanyal, D. J. Aufiero, I. Kitabayashi, W. Herr, and M. L. Cleary Leukemia Proto-Oncoprotein MLL Forms a SET1-Like Histone Methyltransferase Complex with Menin To Regulate Hox Gene Expression Mol. Cell. Biol., July 1, 2004; 24(13): 5639 - 5649. [Abstract] [Full Text] [PDF] |
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