ATP-competitive partial antagonists of the IRE1α RNase segregate outputs of the UPR.
ATP-competitive partial antagonists of the IRE1α RNase segregate outputs of the UPR.
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DOI:
10.1038/s41589-021-00852-0
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发表时间:
2021-11
影响因子:
14.8
通讯作者:
Maly DJ
中科院分区:
文献类型:
--
作者:
Feldman HC;Ghosh R;Auyeung VC;Mueller JL;Kim JH;Potter ZE;Vidadala VN;Perera BGK;Olivier A;Backes BJ;Zikherman J;Papa FR;Maly DJ
The unfolded protein response (UPR) homeostatically matches endoplasmic reticulum (ER) protein-folding capacity to cellular secretory needs. But under high/chronic ER stress, the UPR triggers apoptosis. This dichotomy is promoted by differential activation of the ER transmembrane kinase/endoribonuclease (RNase) IRE1α. We previously found that IRE1α’s RNase can be either fully activated or inactivated by ATP-competitive kinase inhibitors. Here we developed kinase inhibitors—’PAIR’s—Partial Antagonists of IRE1α RNase—that partially antagonize IRE1α’s RNase at full occupancy. Biochemical and structural studies show that PAIRs promote partial RNase antagonism by intermediately displacing the αC helix in IRE1α’s kinase domain. In insulin-producing β-cells, PAIRs permit adaptive XBP1 mRNA splicing, while quelling destructive ER mRNA endonucleolytic decay and apoptosis. By preserving XBP1 mRNA splicing, PAIRs allow B-lymphocytes to differentiate into immunoglobulin-producing plasma cells. Thus, an intermediate RNase-inhibitory “sweet spot”, achieved by PAIR-bound IRE1α captures a desirable conformation for drugging this master UPR sensor/effector.
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影响因子:
29
作者:
Lerner AG;Upton JP;Praveen PV;Ghosh R;Nakagawa Y;Igbaria A;Shen S;Nguyen V;Backes BJ;Heiman M;Heintz N;Greengard P;Hui S;Tang Q;Trusina A;Oakes SA;Papa FR
通讯作者:
Papa FR
影响因子:
14.8
作者:
Grandjean JMD;Madhavan A;Cech L;Seguinot BO;Paxman RJ;Smith E;Scampavia L;Powers ET;Cooley CB;Plate L;Spicer TP;Kelly JW;Wiseman RL
通讯作者:
Wiseman RL
影响因子:
7.7
作者:
Mendez AS;Alfaro J;Morales-Soto MA;Dar AC;McCullagh E;Gotthardt K;Li H;Acosta-Alvear D;Sidrauski C;Korennykh AV;Bernales S;Shokat KM;Walter P
通讯作者:
Walter P
影响因子:
3.3
作者:
Kawahara, T;Yanagi, H;Mori, K
通讯作者:
Mori, K
影响因子:
64.5
作者:
Lee, Kenneth P. K.;Dey, Madhusudan;Sicheri, Frank
通讯作者:
Sicheri, Frank