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. 2019 Mar 11;9:4066. doi: 10.1038/s41598-019-39343-7

Figure 7.

Figure 7

Model of SKP2 regulation by ISG15 and USP18. Two pools of SKP2, a minor ISG15-conjugated one and a more abundant unconjugated one co-exist in a dynamic equilibrium. The unconjugated pool contains the USP18-SKP2 complex (brackets) and SKP2 involved in p27 degradation and cell cycle progression. Changes in the levels of free ISG15 or USP18 will tilt this equilibrium.