The protein encoded by this gene
phosphorylates the alpha subunit of eukaryotic translation-initiation factor 2 (
EIF2), leading to its inactivation, and thus to a rapid reduction of translational initiation and repression of global protein synthesis. It is a type I membrane protein located in the
endoplasmic reticulum (ER), where it is induced by ER stress caused by
malfolded proteins. == Clinical significance ==