2021
DOI: 10.1016/j.jbc.2021.100781
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An interdomain helix in IRE1α mediates the conformational change required for the sensor's activation

Abstract: This is a PDF file of an article that has undergone enhancements after acceptance, such as the addition of a cover page and metadata, and formatting for readability, but it is not yet the definitive version of record. This version will undergo additional copyediting, typesetting and review before it is published in its final form, but we are providing this version to give early visibility of the article. Please note that, during the production process, errors may be discovered which could affect the content, a… Show more

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Cited by 7 publications
(6 citation statements)
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“…As expected, IRE1-HaloTag exhibited a reticulated distribution characteristic of ER-localized proteins ( Figure 1D ). We were surprised to observe that IRE1-HaloTag did not assemble into large clusters upon induction of ER stress ( Figure 1E ; also see “Detection of Large IRE1 Clusters” in Materials and Methods), in direct contrast to previous work by us and others that relied on ectopic expression of GFP-tagged IRE1 protein ( Li et al, 2010 ; Belyy et al, 2020 ; Ricci et al, 2019 ; Ricci et al, 2021 ; Cohen et al, 2017 ; Wu et al, 2021 ; Li et al, 2020 ). The lack of clustering was not due to a defect of the IRE1-HaloTag fusion construct, since overexpression of the same IRE1-HaloTag protein by transient transfection resulted in readily observed stress-induced clusters ( Figure 1—figure supplement 3 ).…”
Section: Resultscontrasting
confidence: 77%
“…As expected, IRE1-HaloTag exhibited a reticulated distribution characteristic of ER-localized proteins ( Figure 1D ). We were surprised to observe that IRE1-HaloTag did not assemble into large clusters upon induction of ER stress ( Figure 1E ; also see “Detection of Large IRE1 Clusters” in Materials and Methods), in direct contrast to previous work by us and others that relied on ectopic expression of GFP-tagged IRE1 protein ( Li et al, 2010 ; Belyy et al, 2020 ; Ricci et al, 2019 ; Ricci et al, 2021 ; Cohen et al, 2017 ; Wu et al, 2021 ; Li et al, 2020 ). The lack of clustering was not due to a defect of the IRE1-HaloTag fusion construct, since overexpression of the same IRE1-HaloTag protein by transient transfection resulted in readily observed stress-induced clusters ( Figure 1—figure supplement 3 ).…”
Section: Resultscontrasting
confidence: 77%
“…In order to minimize the influence of the new circuit on the original instrument, the interface circuit obtains the voltage signal of the original experimental instrument through the emitter-stalk circuit composed of operational amplifiers. Similarly, in order to make the acquisition results consistent with the original experimental instrument, the interface circuit also obtains the reference voltage of the original instrument through the emitter-following circuit as the reference voltage for A/D conversion [19].…”
Section: Research On Various Sensing Technologiesmentioning
confidence: 99%
“…It’s categorized as a type I transmembrane protein with dual functionalities, serving as both an endoribonuclease and a serine/threonine kinase. When GRP78 disengages, IRE1α experiences homo-oligomerization and trans-autophosphorylation events, which then activate its endoribonuclease and kinase domains ( Ricci et al, 2021 ). As a result of this activation, IRE1α becomes engaged in facilitating the splicing of the mRNA intron responsible for encoding XBP1.…”
Section: Endoplasmic Reticulum Stress and Apoptosismentioning
confidence: 99%