Arrestin domain-containing protein 3 (ARRDC3)

Adapter protein that plays a role in regulating cell- surface expression of adrenergic receptors and probably also other G protein-coupled receptors (PubMed:20559325, PubMed:21982743, PubMed:23208550). Plays a role in NEDD4-mediated ubiquitination and endocytosis af triggered ADRB2 and following ADRB2 degradation (PubMed:20559325, PubMed:23208550).

May recruit NEDD4 into ADRB2 (PubMed:20559325). Alternatively, may be the adapter protein that doesn't play a major role in recruiting NEDD4 into ADRB2, but rather plays a part in a targeting ADRB2 into endosomes (PubMed:23208550).