"PERK inhibition on the other hand controls caspase-1-mediated conversion of proIL-1beta to mIL-1beta. These findings reveal translation-independent functions of PERK and IRE1alpha: PERK controls the production of mIL-1beta which is then followed by GRASP55 and IRE1alpha activity to keep mIL-1beta in a secretion-competent form."xsd:string