The search for a PKR code-differential regulation of protein kinase R activity by diverse RNA and protein regulators.

ABSTRACT: The interferon-inducible protein kinase R (PKR) is a key component of host innate immunity that restricts viral replication and propagation. As one of the four eIF2α kinases that sense diverse stresses and direct the integrated stress response (ISR) crucial for cell survival and proliferation, PKR's versatile roles extend well beyond antiviral defense. Targeted by numerous host and viral regulators made of RNA and proteins, PKR is subject to multiple layers of endogenous control and external manipulation, driving its rapid evolution. These versatile regulators include not only the canonical double-stranded RNA (dsRNA) that activates the kinase activity of PKR, but also highly structured viral, host, and artificial RNAs that exert a full spectrum of effects. In this review, we discuss our d

SUBMITTER: Bou-Nader C 

PROVIDER: S-EPMC6467004 | biostudies-literature | 2019 May

REPOSITORIES: biostudies-literature