The protein encoded by this gene phosphorylates the alpha subunit of eukaryotic translation-initiation factor 2, leading to its inactivation, and thus to a rapid reduction of translational initiation and repression of global protein synthesis. This protein is thought to modulate mitochondrial function. It is a type I membrane protein located in the endoplasmic reticulum (ER), where it is induced by ER stress caused by malfolded proteins. Mutations in this gene are associated with Wolcott-Rallison syndrome.,EIF2AK3,PEK,PERK,WRS,Epigenetics & Nuclear Signaling,Translation Control,Regulation of eIF2,Signal Transduction,Kinase,Serine/threonine kinases,Cell Biology & Developmental Biology,Apoptosis,Protein folding,Endocrine & Metabolism,Endocrine and metabolic diseases,Diabetes,Metabolic disorders,Obesity,Neuroscience,Neurodegenerative Diseases,Protein phosphorylation,EIF2AK3