CELE_F53H8.2, F53H8.2

arr-1 encodes the C. elegans beta-arrestin ortholog (OMIM:107940, 107941, mice lacking beta-arrestin family members display defects in G protein-coupled receptor desensitization); by homology, ARR-1 is predicted to be a multifunctional adaptor protein that interacts with intracellular signaling molecules as well as activated and phosphorylated G protein-coupled and TGF-beta receptors to: 1) downregulate receptor signaling, 2) promote receptor endocytosis, and 3) activate MAP kinase- and Src-dependent signaling pathways; in vivo, arr-1 activity is required for normal egg laying and for proper olfactory adaptation and recovery to volatile odorants; in addition, animals doubly mutant for arr-1 and grk-2, which encodes a G protein-coupled receptor kinase, are sick and slow growing; ARR-1 is detected throughout the nervous system and is highly expressed in the amphid chemosensory neurons; in neuronal cells, ARR-1 appears to be largely cytoplasmic; ARR-1 interacts physically with clathrin and beta2-adaptin, two proteins involved in receptor endocytosis.

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