After being recruited into the NIK (NFkB-inducing kinase) complex, activated IKKA (I kappaB kinase alpha) phosphorylates serine residues 99, 108, 115, 123, 866, 870 and 872 located in both N- and C-terminal regions of NFKB2/p100. The phosphorylation of these specific serines is the prerequisite for ubiquitination and subsequent processing of p100. The C-terminal serine residues create a binding site for beta-TRCP (beta-transducinrepeat-containing protein), a ubiquitin E3 ligase (Xiao et al. 2001 & 2004, Liang et al. 2006).
Sun, SC, Harhaj, EW, Xiao, G
Liang, C, Sun, SC, Zhang, M
Fong, A, Sun, SC, Xiao, G
protein serine/threonine kinase activity of Active NIK:p-S176,180-IKKA dimer:p100:RELB [cytosol]
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