Activated PLK1 phosphorylates OPTN (optineurin) on serine residue S177. Phosphorylation at S177 disrupts OPTN binding to Golgi-membrane localized RAB8A (Kachaner et al. 2012).
Kachaner, D, Filipe, J, Laplantine, E, Bauch, A, Bennett, KL, Superti-Furga, G, Israel, A, Weil, R
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