Role of the polycomb protein EED in the propagation of repressive histone marks.
Role of the polycomb protein EED in the propagation of repressive histone marks.
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作者:
Polycomb Group (PcG) proteins play an essential role in the epigenetic maintenance of repressive chromatin states. The gene silencing activity of the Polycomb Repressive Complex 2 (PRC2) depends on its ability to tri-methylate lysine 27 of histone H3 (H3K27) via the catalytic SET domain of the EZH2 subunit, and at least two other subunits of the complex: Suz12 and Eed. We show that the C-terminal domain of Eed specifically binds to histone tails carrying tri-methyl lysine residues associated with repressive chromatin marks and that this leads to the allosteric activation of the methyltransferase activity of PRC2. Mutations in Eed that prevent it from recognising repressive trimethyl-lysine marks abolish activation of PRC2 in vitro and, in Drosophila, reduces global methylation and disrupts development. These findings suggest a model for the propagation of the H3K27me3 mark that accounts for the maintenance of repressive chromatin domains and for the transmission of a histone modification from mother to daughter cells.
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DOI:
10.1107/s0907444904019158
发表时间:
2004-12-01
影响因子:
2.2
作者:
Emsley, P;Cowtan, K
通讯作者:
Cowtan, K
影响因子:
2.7
作者:
Kurzhals, Rebeccah L.;Tie, Feng;Harte, Peter J.
通讯作者:
Harte, Peter J.
影响因子:
3.3
作者:
Bateman, Jack R.;Lee, Anne M.;Wu, C. -ting
通讯作者:
Wu, C. -ting
影响因子:
56.9
作者:
Huang, Y;Fang, J;Xu, RM
通讯作者:
Xu, RM
影响因子:
64.5
作者:
Czermin, B;Melfi, R;Pirrotta, V
通讯作者:
Pirrotta, V