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. 2019 Jul 18;12:2516865719865282. doi: 10.1177/2516865719865282

Figure 1.

Figure 1.

Model for action of WIN site inhibitors. Left panel: WDR5 is bound to chromatin, downstream of the transcription start site (green arrow), at a conserved group of protein synthesis genes (PSG). WDR5 associates with these genes by engaging a chromatin-resident protein (gray oval) via the WIN site. Association of WDR5 with these genes ensures balanced production of ribosome subunits and other nucleolar and translation factors necessary to support appropriate levels of ribosome production. Right panel: WIN site inhibitors (“i”) displace WDR5 from chromatin, reducing PSG expression. This in turn induces nucleolar stress, activating p53-dependent cellular inhibition.