Ubiquitin protease USP10 binds doubly ISGylated and monoubiquitinated PCNA (Park et al. 2014). PCNA exists as a homotrimer so that the ISGylation and monoubiquitination occur on different subunits.
Lee, SW, Seol, JH, Yang, SW, Yu, KR, Park, JM, Ka, SH, Jeon, YJ, Chung, CH
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