The transcription factor IRF3 is a target for ISGylation. Conjugation of ISG15 positively regulates IRF3 and thereby promotes induction of type I interferons. ISGylation of IRF3 prevents the binding of PIN1, a protein that promotes IRF3 ubiquitination and subsequent degradation.
Knobeloch, KP, Okumura, A, Pitha-Rowe, I, Lu, G, Reinert, JT, Pitha-Rowe, PM, Kellum, M, Hassel, B
Liu, X, Shi, HX, Yang, K, Zhu, LH, Wei, B, Wang, C, Shan, YF, Liu, XY
ubiquitin-protein transferase activity of ISG15:UBCH8:ISG15 E3 ligase [cytosol]
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