| RGS11 — Regulator of G Protein Signaling 11 | |
|---|---|
| Symbol | RGS11 |
| Full Name | Regulator of G Protein Signaling 11 |
| Chromosome | 16p13.3 |
| NCBI Gene | 6756 |
| OMIM | 607446 |
| Ensembl | ENSG00000159461 |
| UniProt | O76080 |
| Diseases | [Parkinson's Disease](/diseases/parkinsons-disease), [Ocular Motility Disorders](/diseases/ocular-motility-disorders), [Cognitive Decline](/diseases/cognitive-decline), [Chronic Vertigo](/diseases/chronic-vertigo) |
| Expression | Retina, Olfactory bulb, Cerebellum, Brainstem, [Hippocampus](/brain-regions/hippocampus) |
RGS11 (Regulator of G Protein Signaling 11) is a neuronal-specific member of the RGS protein family with particularly high expression in sensory neurons and specific brain regions. RGS11 plays critical roles in modulating G protein-coupled receptor (GPCR) signaling in the visual system, olfactory system, and motor coordination circuits.
RGS11 encodes a 217-amino acid protein containing a conserved RGS domain with GAP activity toward Gαo subunits. The protein is distinguished by its N-terminal extension that mediates specific protein-protein interactions, including binding to the RGS7-like protein RGS6. RGS11 forms functional complexes with Gβ5 (GNB5) subunits, creating highly efficient GAP complexes for specific GPCR pathways.
RGS11 is highly expressed in retinal photoreceptors and bipolar cells, where it modulates metabotropic glutamate receptor (mGluR6) signaling. This regulation is essential for proper visual signal transduction from photoreceptors to bipolar cells and ultimately to ganglion cells for image-forming vision.
RGS11 forms obligate heterodimers with the G protein β5 subunit (GNB5), creating RGS11-Gβ5 complexes that function as highly efficient GAPs. These complexes are particularly effective at regulating Gαo signaling pathways and are enriched in specific neuronal populations.
In the olfactory epithelium, RGS11 modulates odorant receptor signaling by controlling the duration and intensity of Gαolf-mediated signaling. This regulation affects olfactory transduction and may influence odor discrimination and sensory adaptation.
RGS11 is expressed in dopaminergic neurons of the substantia nigra pars compacta, where it modulates dopamine receptor signaling. Altered RGS11 expression or function may contribute to dopaminergic signaling deficits in Parkinson's disease.
Given RGS11's high expression in the retina and oculomotor nuclei, alterations may contribute to ocular motility abnormalities seen in various neurological conditions.
RGS11 expression in the cerebellum and brainstem vestibular nuclei suggests roles in vestibular function and balance. RGS11 may influence vestibular compensation following injury.
RGS11 exhibits highly restricted neuronal expression with highest levels in:
RGS11 represents a therapeutic target for: