Generic membrane spanning features endow IRE1α with responsiveness to membrane aberrancy

N Kono, Niko Amin-Wetzel & David Ron
Altered cellular lipid composition activates the endoplasmic reticulum unfolded protein response (UPR) and UPR signaling effects important changes in lipid metabolism. Secondary effects on protein folding homeostasis likely contribute to UPR activation, but deletion of the unfolded protein stress-sensing luminal domain of the UPR transducers PERK and IRE1α does not abolish their responsiveness to lipid perturbation. This finding suggests that PERK and IRE1α also directly recognize the membrane aberrancy wrought by lipid perturbation. However, beyond...

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