Noncanonical scaffolding of G αi and β-arrestin by G protein-coupled receptors

Heterotrimeric guanine nucleotide-binding protein (G protein)-coupled receptors (GPCRs) are common drug targets and canonically couple to specific G protein subtypes and β-arrestin adaptor proteins. G protein-mediated signaling and β-arrestin-mediated signaling have been considered separable. We sho...

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Veröffentlicht in:Science (American Association for the Advancement of Science) 2021-03, Vol.371 (6534)
Hauptverfasser: Smith, Jeffrey S, Pack, Thomas F, Inoue, Asuka, Lee, Claudia, Zheng, Kevin, Choi, Issac, Eiger, Dylan S, Warman, Anmol, Xiong, Xinyu, Ma, Zhiyuan, Viswanathan, Gayathri, Levitan, Ian M, Rochelle, Lauren K, Staus, Dean P, Snyder, Joshua C, Kahsai, Alem W, Caron, Marc G, Rajagopal, Sudarshan
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container_issue 6534
container_start_page
container_title Science (American Association for the Advancement of Science)
container_volume 371
creator Smith, Jeffrey S
Pack, Thomas F
Inoue, Asuka
Lee, Claudia
Zheng, Kevin
Choi, Issac
Eiger, Dylan S
Warman, Anmol
Xiong, Xinyu
Ma, Zhiyuan
Viswanathan, Gayathri
Levitan, Ian M
Rochelle, Lauren K
Staus, Dean P
Snyder, Joshua C
Kahsai, Alem W
Caron, Marc G
Rajagopal, Sudarshan
description Heterotrimeric guanine nucleotide-binding protein (G protein)-coupled receptors (GPCRs) are common drug targets and canonically couple to specific G protein subtypes and β-arrestin adaptor proteins. G protein-mediated signaling and β-arrestin-mediated signaling have been considered separable. We show here that GPCRs promote a direct interaction between G protein subtype family members and β-arrestins regardless of their canonical G protein subtype coupling. G :β-arrestin complexes bound extracellular signal-regulated kinase (ERK), and their disruption impaired both ERK activation and cell migration, which is consistent with β-arrestins requiring a functional interaction with G for certain signaling events. These results introduce a GPCR signaling mechanism distinct from canonical G protein activation in which GPCRs cause the formation of G :β-arrestin signaling complexes.
doi_str_mv 10.1126/science.aay1833
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subjects Arrestin
beta-Arrestins - metabolism
Bioluminescence Resonance Energy Transfer Techniques
Calcium
Cell adhesion & migration
Cell Movement
Coordination
Energy transfer
Extracellular Signal-Regulated MAP Kinases - metabolism
Fatty acids
GTP-Binding Protein alpha Subunits, Gi-Go - metabolism
HEK293 Cells
Humans
Kinases
Ligands
Migration
Narcotics
Peptides
Protein kinase
Proteins
Receptors, G-Protein-Coupled - metabolism
Resonance
Scaffolding
Side effects
Signal Transduction
Therapeutic targets
title Noncanonical scaffolding of G αi and β-arrestin by G protein-coupled receptors
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