In response to stress-activated p38 signaling, MAPKAPK3 phosphorylates BMI1, leading to the dissociation of the PRC1.4 complex from chromatin and transcription of p14-ARF (Voncken et al. 2005).
Ludwig, S, Voncken, JW, Neufeld, B, Kubben, N, Niessen, H, Dahlmans, V, Rennefahrt, U, Holzer, B, Rapp, UR
protein serine/threonine kinase activity of phospho-MAPK p38:p-MAPKAPK3 [nucleoplasm]
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