Polycomb repressive complex 2 (PRC2) carries out the methylation of lysine 27 of histone H3, a hallmark of repressive chromatin. Three core subunits make up the catalytic core of PRC2; the SET domain containing EZH2, the zinc-finger containing SUZ12 and the WD40 repeat protein EED. The complex forms a compact arrangement of three lobes. This is the N-terminal domain of EZH2 [1].

1: Structural basis of oncogenic histone H3K27M inhibition of human polycomb repressive complex 2. Justin N, Zhang Y, Tarricone C, Martin SR, Chen S, Underwood E, De Marco V, Haire LF, Walker PA, Reinberg D, Wilson JR, Gamblin SJ; Nat Commun. 2016;7:11316. PMID:27121947