CBX4 (Pc2) in the PRC1 complex SUMOylates CETN2 at an unknown residue with SUMO2,3 (Klein and Nigg 2009). SUMOylation of CETN2 enhances its nuclear localization. Interaction with XPC is also required for nuclear localization of CETN2.
Nigg, EA, Klein, UR
SUMO transferase activity of PRC1 complex [nucleoplasm]
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