Structural highlightsFunctionEED_HUMAN Polycomb group (PcG) protein. Component of the PRC2/EED-EZH2 complex, which methylates 'Lys-9' and 'Lys-27' of histone H3, leading to transcriptional repression of the affected target gene. Also recognizes 'Lys-26' trimethylated histone H1 with the effect of inhibiting PRC2 complex methyltransferase activity on nucleosomal histone H3 'Lys-27', whereas H3 'Lys-27' recognition has the opposite effect, enabling the propagation of this repressive mark. The PRC2/EED-EZH2 complex may also serve as a recruiting platform for DNA methyltransferases, thereby linking two epigenetic repression systems. Genes repressed by the PRC2/EED-EZH2 complex include HOXC8, HOXA9, MYT1 and CDKN2A.[1] [2] [3] [4] [5] [6] [7] [8] [9]
Publication Abstract from PubMed
The polycomb repressive complex 2 (PRC2) histone methyltransferase plays a central role in epigenetic regulation in development and in cancer, and hence to interrogate its role in a specific developmental transition, methods are needed for disrupting function of the complex with high temporal and spatial precision. The catalytic and substrate recognition functions of PRC2 are coupled by binding of the N-terminal helix of the Ezh2 methylase to an extended groove on the EED trimethyl lysine binding subunit. Disrupting PRC2 function can in principle be achieved by blocking this single interaction, but there are few approaches for blocking specific protein-protein interactions in living cells and organisms. Here, we describe the computational design of proteins that bind to the EZH2 interaction site on EED with subnanomolar affinity in vitro and form tight and specific complexes with EED in living cells. Induction of the EED binding proteins abolishes H3K27 methylation in human embryonic stem cells (hESCs) and at all but the earliest stage blocks self-renewal, pinpointing the first critical repressive H3K27me3 marks in development.
First critical repressive H3K27me3 marks in embryonic stem cells identified using designed protein inhibitor.,Moody JD, Levy S, Mathieu J, Xing Y, Kim W, Dong C, Tempel W, Robitaille AM, Dang LT, Ferreccio A, Detraux D, Sidhu S, Zhu L, Carter L, Xu C, Valensisi C, Wang Y, Hawkins RD, Min J, Moon RT, Orkin SH, Baker D, Ruohola-Baker H Proc Natl Acad Sci U S A. 2017 Sep 19;114(38):10125-10130. doi:, 10.1073/pnas.1706907114. Epub 2017 Sep 1. PMID:28864533[10]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
See AlsoReferences
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- ↑ van der Vlag J, Otte AP. Transcriptional repression mediated by the human polycomb-group protein EED involves histone deacetylation. Nat Genet. 1999 Dec;23(4):474-8. PMID:10581039 doi:10.1038/70602
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- ↑ Cao R, Zhang Y. SUZ12 is required for both the histone methyltransferase activity and the silencing function of the EED-EZH2 complex. Mol Cell. 2004 Jul 2;15(1):57-67. PMID:15225548 doi:10.1016/j.molcel.2004.06.020
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- ↑ Sarma K, Margueron R, Ivanov A, Pirrotta V, Reinberg D. Ezh2 requires PHF1 to efficiently catalyze H3 lysine 27 trimethylation in vivo. Mol Cell Biol. 2008 Apr;28(8):2718-31. doi: 10.1128/MCB.02017-07. Epub 2008 Feb, 19. PMID:18285464 doi:10.1128/MCB.02017-07
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- ↑ Moody JD, Levy S, Mathieu J, Xing Y, Kim W, Dong C, Tempel W, Robitaille AM, Dang LT, Ferreccio A, Detraux D, Sidhu S, Zhu L, Carter L, Xu C, Valensisi C, Wang Y, Hawkins RD, Min J, Moon RT, Orkin SH, Baker D, Ruohola-Baker H. First critical repressive H3K27me3 marks in embryonic stem cells identified using designed protein inhibitor. Proc Natl Acad Sci U S A. 2017 Sep 19;114(38):10125-10130. doi:, 10.1073/pnas.1706907114. Epub 2017 Sep 1. PMID:28864533 doi:http://dx.doi.org/10.1073/pnas.1706907114
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