RNA viruses in the paramyxovirus family have evolved a number of strategies to escape host cell surveillance and antiviral responses. One mechanism exploited by a number of viruses in this family is direct targeting of cytokine-inducible transcription regulators in the STAT family. Diverse members of this large virus family effectively suppress STAT signaling by the actions of their V proteins, or the related proteins derived from alternate viral mRNAs. These viral proteins have distinct means of targeting STATs, resulting in a variety of negative effects on STATs and their signal transduction. Recent developments in understanding STAT targeting will be reviewed.
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