Translational regulation, Innate immunity

A few recent papers I came across with maybe some implications for understanding translational regulation. Also an interesting one on a new role for a mitochondrial protein in innate immune signalling. Not that I've read them...if anyone does be sure to give me the low-down!

• Regulating Gene Expression through RNA Nuclear Retention. Kannanganattu et al., Cell.
• Higher-Order Substrate Recognition of eIF2α by the RNA-Dependent Protein Kinase PKR. Dar et al., Cell.
• Mechanistic Link between PKR Dimerization, Autophosphorylation, and eIF2α Substrate Recognition. Dever et al., Cell.

• Identification and Characterization of MAVS, a Mitochondrial Antiviral Signaling Protein that Activates NF-κB and IRF3. Seth et al., Cell.