Unprocessed NFKB2 p100 is SUMOylated with SUMO1 at lysine-90, lysine-298, lysine-689, and lysine-863 (Vatsyayan et al. 2008). SUMOylation of p100 is required for phosphorylation of p100 prior to processing to yield p52. Blockage of SUMOylation consequently interferes with import of NFKB2 p52 into the nucleus.
Hu, J, Qing, G, Vatsyayan, J, Xiao, G
SUMO transferase activity of SUMO1:C93-UBE2I [cytosol]
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