Interferon, restriction factors and SUMO pathways.
Cytokine & growth factor reviews(2020)
摘要
SUMOylation is a reversible post-translational modification that regulates several cellular processes including protein stability, subcellular localization, protein-protein interactions and plays a key role in the interferon (IFN) pathway and antiviral defense. In human, three ubiquitously expressed SUMO paralogs (SUMO1, 2 and 3) have been described for their implication in both intrinsic and innate immunity. Differential effects between SUMO paralogs are emerging such as their distinctive regulations of IFN synthesis, of IFN signaling and of the expression and function of IFN-stimulated gene (ISG) products. Several restriction factors are conjugated to SUMO and their modifications are further enhanced in response to IFN. Also, IFN itself was shown to increase global cellular SUMOylation and requires the presence of the E3 SUMO ligase PML that coordinates the assembly of PML nuclear bodies. This review focuses on differential effects of SUMO paralogs on IFN signaling and the stabilization/destabilization of ISG products, highlighting the crosstalk between SUMOylation and other post-translational modifications such as ubiquitination and ISGylation.
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