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USP18 – a Multifunctional Component in the Interferon Response

Anja BastersKlaus-Peter KnobelochGünter Fritz

出版	Universität, 2018
URL	http://books.google.com.hk/books?id=_mC4zwEACAAJ&hl=&source=gbs_api

註釋Abstract: Ubiquitin-specific proteases (USPs) represent the largest family of deubiquitinating enzymes (DUB). These proteases cleave the isopeptide bond between ubiquitin and a lysine residue of a ubiquitin-modified protein. USP18 is a special member of the USP family as it only deconjugates the ubiquitin-like protein ISG15 (interferon-stimulated gene (ISG) 15) from target proteins but is not active towards ubiquitin. Independent of its protease activity, USP18 functions as a major negative regulator of the type I interferon response showing that USP18 is - at least - a bifunctional protein. In this review, we summarise our current knowledge of protease-dependent and -independent functions of USP18 and discuss the structural basis of its dual activity