CBX4 (Pc2) via its SUMO-interacting motifs recruits both CTBP1 and SUMO1:UBE2I (SUMO1:UBC9) to polycomb bodies where CTBP1 is SUMOylated with SUMO1 at lysine-428 (Kagey et al. 2003, Merrill et al. 2010, Yang and Sharrocks 2010).
Yang, SH, Sharrocks, AD
Melhuish, TA, Wotton, D, Kagey, MH
Yang, SH, Melhuish, TA, Merrill, JC, Sharrocks, AD, Wotton, D, Kagey, MH
SUMO transferase activity of PRC1 complex [nucleoplasm]
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