RGS3 — Regulator of G Protein Signaling 3

RGS3 — Regulator of G Protein Signaling 3

Introduction

Rgs3 — Regulator Of G Protein Signaling 3 is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.

<div class="infobox infobox-gene"> [@vries1999]
<div class="infobox-header">RGS3</div> [@hooks2018]

Overview

RGS3 — Regulator of G Protein Signaling 3 is involved in neuronal signaling and synaptic function. [@xu2021]

RGS3 — Regulator of G Protein Signaling 3

Introduction

Rgs3 — Regulator Of G Protein Signaling 3 is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.

<div class="infobox infobox-gene"> [@vries1999]
<div class="infobox-header">RGS3</div> [@hooks2018]

Overview

RGS3 — Regulator of G Protein Signaling 3 is involved in neuronal signaling and synaptic function. [@xu2021]

<div class="infobox-row"><span class="infobox-label">Full Name</span><span class="infobox-value">Regulator of G Protein Signaling 3</span></div>
<div class="infobox-row"><span class="infobox-label">Symbol</span><span class="infobox-value">RGS3</span></div>
<div class="infobox-row"><span class="infobox-label">Chromosomal Location</span><span class="infobox-value">9q32</span></div>
<div class="infobox-row"><span class="infobox-label">NCBI Gene ID</span><span class="infobox-value">[8702](https://www.ncbi.nlm.nih.gov/gene/8702)</span></div>
<div class="infobox-row"><span class="infobox-label">OMIM</span><span class="infobox-value">[604739](https://www.omim.org/entry/604739)</span></div>
<div class="infobox-row"><span class="infobox-label">Ensembl ID</span><span class="infobox-value">ENSG00000138835</span></div>
<div class="infobox-row"><span class="infobox-label">UniProt ID</span><span class="infobox-value">[O43581](https://www.uniprot.org/uniprot/O43581)</span></div>
<div class="infobox-row"><span class="infobox-label">Associated Diseases</span><span class="infobox-value">Alzheimer's Disease, Parkinson's Disease, Epilepsy</span></div>
</div>

Function

Regulator of G protein Signaling 3 (RGS3) is a member of the RGS protein family, which function as GTPase-activating proteins (GAPs) for heterotrimeric G proteins. RGS proteins accelerate the intrinsic GTPase activity of Gα subunits, thereby rapidly terminating G protein-mediated signaling.

RGS3 is characterized by:

• A conserved RGS domain (approximately 120 amino acids) that mediates GAP activity
• Multiple protein interaction domains including PDZ, PTB, and coiled-coil domains
• Alternative splicing generating multiple isoforms with distinct expression patterns and functions

• Modulation of G protein-coupled receptor (GPCR) signaling: It terminates signaling from various neurotransmitter receptors including muscarinic, dopaminergic, and serotonergic receptors
• Regulation of neuronal excitability: Through modulation of ion channel function
• Synaptic plasticity: RGS3 influences [long-term potentiation](/mechanisms/long-term-potentiation) and depression
• Cell migration and development: RGS3 plays roles in neural crest cell migration

Disease Associations

Alzheimer's Disease

RGS3 expression is altered in Alzheimer's disease brains. The protein may:

• Modulate [amyloid-beta](/proteins/amyloid-beta) toxicity through G protein signaling pathways
• Influence [tau](/proteins/tau) phosphorylation via [GSK-3β](/entities/gsk3-beta) signaling
• Regulate neuroinflammatory responses

Parkinson's Disease

RGS3 plays a role in dopaminergic signaling and may contribute to PD pathophysiology through:

• Regulation of D1 and D2 dopamine receptor signaling
• Modulation of striatal function
• Potential interactions with [alpha-synuclein](/proteins/alpha-synuclein)

Epilepsy

RGS3 has been implicated in epileptogenesis through its regulation of:

• GABA_B receptor signaling
• Neuronal excitability
• Synaptic transmission

Expression

RGS3 shows widespread but specific expression in:

• Cerebral [cortex](/brain-regions/cortex)
• [Hippocampus](/brain-regions/hippocampus)
• Basal ganglia
• [Cerebellum](/brain-regions/cerebellum)
• Spinal cord
• Heart and vascular tissue

Key Publications

See Also

• [RGS2](/genes/rgs2) - Regulator of G Protein Signaling 2
• [RGS4](/genes/rgs4) - Regulator of G Protein Signaling 4
• [G Protein Signaling](/mechanisms/g-protein-coupled-receptor-signaling)
• [Alzheimer's Disease](/diseases/alzheimers-disease)
• [Parkinson's Disease](/diseases/parkinsons-disease)

Background

The study of Rgs3 — Regulator Of G Protein Signaling 3 has evolved significantly over the past decades. Research in this area has revealed important insights into the underlying mechanisms of neurodegeneration and continues to drive therapeutic development.

Historical context and key discoveries in this field have shaped our current understanding and will continue to guide future research directions.

External Links

• [NCBI Gene](https://www.ncbi.nlm.nih.gov/gene/)
• [UniProt](https://www.uniprot.org/)

References