Abstract:
:β-arrestin 1 and 2 (also known as arrestin 2 and 3) are homologous adaptor proteins that regulate seven-transmembrane receptor trafficking and signalling. Other proteins with predicted 'arrestin-like' structural domains but lacking sequence homology have been indicated to function like β-arrestin in receptor regulation. We demonstrate that β-arrestin2 is the primary adaptor that rapidly binds agonist-activated β(2) adrenergic receptors (β(2)ARs) and promotes clathrin-dependent internalization, E3 ligase Nedd4 recruitment and ubiquitin-dependent lysosomal degradation of the receptor. The arrestin-domain-containing (ARRDC) proteins 2, 3 and 4 are secondary adaptors recruited to internalized β(2)AR-Nedd4 complexes on endosomes and do not affect the adaptor roles of β-arrestin2. Rather, the role of ARRDC proteins is to traffic Nedd4-β(2)AR complexes to a subpopulation of early endosomes.
journal_name
EMBO Repjournal_title
EMBO reportsauthors
Han SO,Kommaddi RP,Shenoy SKdoi
10.1038/embor.2012.187subject
Has Abstractpub_date
2013-02-01 00:00:00pages
164-71issue
2eissn
1469-221Xissn
1469-3178pii
embor2012187journal_volume
14pub_type
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