Your browser version may not work well with NCBI's Web applications. More information here...
1: Genes Dev. 2003 Feb 15;17(4):455-60.Click here to read Click here to read Links

Protein ISGylation modulates the JAK-STAT signaling pathway.

Malakhova OA, Yan M, Malakhov MP, Yuan Y, Ritchie KJ, Kim KI, Peterson LF, Shuai K, Zhang DE.

Department of Molecular and Experimental Medicine, The Scripps Research Institute, La Jolla, California 92037, USA.

ISG15 is one of the most strongly induced genes upon viral infection, type I interferon (IFN) stimulation, and lipopolysaccharide (LPS) stimulation. Here we report that mice lacking UBP43, a protease that removes ISG15 from ISGylated proteins, are hypersensitive to type I IFN. Most importantly, in UBP43-deficient cells, IFN-beta induces a prolonged Stat1 tyrosine phosphorylation, DNA binding, and IFN-mediated gene activation. Furthermore, restoration of ISG15 conjugation in protein ISGylation-defective K562 cells increases IFN-stimulated promoter activity. These findings identify UBP43 as a novel negative regulator of IFN signaling and suggest the involvement of protein ISGylation in the regulation of the JAK-STAT pathway.

PMID: 12600939 [PubMed - indexed for MEDLINE]

PMCID: PMC195994

Patient Drug Information