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PACT is a stress-modulated, cellular activator of interferon (IFN)-induced double-stranded (ds) RNA-activated protein kinase (PKR) and is an important regulator of PKR-dependent signaling pathways. The research presented here is aimed at understanding the regulation of PACT expression in mammalian cells. PACT is expressed ubiquitously in different cell types at varying abundance. We have characterized...
PKR is an interferon(IFN)-induced, serine-threonine protein kinase, which plays a crucial role in IFN's antiviral and antiproliferative actions. The three known activators of PKR are dsRNA, heparin, and PACT. PACT activates PKR by direct protein-protein interaction in response to cellular stress. The human TAR (trans-activating region)-binding protein (TRBP), which is very homologous to PACT, also...
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