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rgs16

Introduction

RGS16 (Regulator of G Protein Signaling 16) encodes a member of the RGS family of GTPase-activating proteins that negatively regulate G protein-coupled receptor signaling [1][2]. Located at chromosome 19q13.12, RGS16 plays critical roles in modulating circadian rhythm, neuronal excitability, synaptic transmission, and inflammatory responses—all processes relevant to neurodegenerative disease pathogenesis. The protein is notable for its rhythmic expression patterns driven by the circadian clock, linking cellular timekeeping to GPCR signal transduction.

RGS16 — Regulator of G Protein Signaling 16

| | |
|---|---|
| Symbol | RGS16 |
| Full Name | Regulator of G Protein Signaling 16 |
| Chromosome | 19q13.12 |
| NCBI Gene ID | [6004](https://www.ncbi.nlm.nih.gov/gene/6004) |
| OMIM | [602811](https://www.omim.org/entry/602811) |
| Ensembl ID | [ENSG00000128283](https://www.ensembl.org/Homo_sapiens/Gene/Summary?g=ENSG00000128283) |
| UniProt ID | [O15410](https://www.uniprot.org/uniprot/O15410) |
| Encoded Protein | [RGS16 Protein](/proteins/rgs16-protein) |
| Associated Diseases | [Alzheimer's Disease](/diseases/alzheimers-disease), [Parkinson's Disease](/diseases/parkinsons-disease), [Mood Disorders](/diseases/major-depressive-disorder), [Glaucoma](/diseases/glaucoma) |

</div>

Gene Structure and Protein

Protein Structure

...

rgs16

Introduction

RGS16 (Regulator of G Protein Signaling 16) encodes a member of the RGS family of GTPase-activating proteins that negatively regulate G protein-coupled receptor signaling [1][2]. Located at chromosome 19q13.12, RGS16 plays critical roles in modulating circadian rhythm, neuronal excitability, synaptic transmission, and inflammatory responses—all processes relevant to neurodegenerative disease pathogenesis. The protein is notable for its rhythmic expression patterns driven by the circadian clock, linking cellular timekeeping to GPCR signal transduction.

RGS16 — Regulator of G Protein Signaling 16

| | |
|---|---|
| Symbol | RGS16 |
| Full Name | Regulator of G Protein Signaling 16 |
| Chromosome | 19q13.12 |
| NCBI Gene ID | [6004](https://www.ncbi.nlm.nih.gov/gene/6004) |
| OMIM | [602811](https://www.omim.org/entry/602811) |
| Ensembl ID | [ENSG00000128283](https://www.ensembl.org/Homo_sapiens/Gene/Summary?g=ENSG00000128283) |
| UniProt ID | [O15410](https://www.uniprot.org/uniprot/O15410) |
| Encoded Protein | [RGS16 Protein](/proteins/rgs16-protein) |
| Associated Diseases | [Alzheimer's Disease](/diseases/alzheimers-disease), [Parkinson's Disease](/diseases/parkinsons-disease), [Mood Disorders](/diseases/major-depressive-disorder), [Glaucoma](/diseases/glaucoma) |

</div>

Gene Structure and Protein

Protein Structure

RGS16 is a member of the RGS family characterized by a conserved RGS domain of approximately 120 amino acids that forms an alpha-helical bundle structure [3]. RGS16 contains several distinctive features:

RGS Domain: The conserved catalytic domain that mediates GAP activity toward Gα subunits
N-terminal Region: Contains a cysteine-rich sequence that may mediate palmitoylation and membrane association
PDZ-Binding Motif: C-terminal sequence that allows interaction with PDZ domain-containing proteins

The protein undergoes post-translational modifications including:

Palmitoylation: Multiple cysteine residues allow lipid modification and membrane targeting
Phosphorylation: Serine/threonine phosphorylation modulates protein activity and interactions

Protein Complexes

RGS16 functions as part of larger protein complexes:

Gα Substrate Binding: RGS16 selectively binds active Gαi, Gαo, and Gαq subunits
RGS7 Complex: In some tissues, RGS16 forms complexes with RGS7 and RGS6
PDZ Interactions: The C-terminal PDZ-binding motif interacts with scaffold proteins

Expression Patterns

Brain Expression

RGS16 exhibits unique expression patterns in the central nervous system [4]:

Suprachiasmatic Nucleus (SCN): Highest expression in the master circadian clock, with dramatic daily rhythms
Hippocampus: Moderate expression in CA1-CA3 pyramidal neurons and dentate gyrus
Cortex: Layer-specific expression, particularly in layer VI pyramidal neurons
Basal Ganglia: Expression in striatum and substantia nigra
Hypothalamus: Various nuclei show RGS16 expression
Cerebellum: Low expression in Purkinje cells

Circadian Regulation

RGS16 expression is under circadian clock control [5]:

Rhythmic Expression: RGS16 mRNA cycles with a ~24-hour period in the SCN
BMAL1/CLOCK Regulation: The circadian transcription factors drive Rgs16 expression
Light Responsiveness: Light exposure can phase-shift RGS16 rhythms
Tissue Specificity: Rhythms are prominent in SCN but dampened in other brain regions

This circadian regulation links the molecular clock to GPCR signaling, potentially synchronizing cellular responses to daily environmental cycles.

Cellular Expression

Neurons: RGS16 localizes to dendrites and postsynaptic compartments
Astrocytes: Moderate expression with nuclear localization
Microglia: Lower expression compared to RGS10
Pineal Gland: High expression for nocturnal hormone regulation

Role in Circadian Rhythm

SCN Function

RGS16 is highly expressed in the suprachiasmatic nucleus, the master circadian clock of the hypothalamus [6]. Its rhythmic expression serves several functions:

GPCR Modulation: RGS16 regulates GPCR signaling in SCN neurons

Circadian Output: RGS16 rhythms transmit time-of-day information

Light Signaling: RGS16 modulates light-induced signal transduction

Output Pathways: RGS16 influences downstream circadian-regulated processes

Clock Gene Regulation

RGS16 interacts with the circadian clock machinery:

PER1/2 Expression: RGS16 rhythms contribute to rhythmic gene expression
BMAL1 Interaction: The circadian factor BMAL1 directly activates Rgs16 transcription
Feedback Regulation: RGS16 may feed back to influence clock function

Implications for Neurodegeneration

Circadian dysfunction is common in neurodegenerative diseases [7]:

AD: Circadian rhythm disturbances precede cognitive decline
PD: Sleep fragmentation and timing abnormalities common
Aging: Circadian amplitude decreases with age

RGS16 dysregulation may contribute to circadian abnormalities in these conditions, potentially accelerating disease progression.

Neurobiological Functions

Neuronal Excitability

RGS16 modulates neuronal excitability through GPCR regulation[@sjulson2007]:

Action Potential Dynamics: RGS16 influences firing patterns in hippocampal and cortical neurons
Calcium Signaling: Modulation of voltage-gated calcium channels through Gq pathways
Synaptic Integration: RGS16 affects dendrite integration of synaptic inputs
Homeostatic Plasticity: Contributes to activity-dependent adjustments in neuronal function

Synaptic Plasticity

RGS16 plays important roles in synaptic plasticity[@wang2023]:

LTP/LTD: RGS16 regulates the induction and maintenance of long-term potentiation and depression
Dendritic Spines: RGS16 influences spine morphology and density
AMPA Receptor Trafficking: Modulates receptor internalization and insertion
NMDA Receptor Signaling: RGS16 affects NMDA receptor-mediated calcium influx

Neuroinflammation

RGS16 modulates neuroinflammatory responses[@choi2023]:

Microglial Activation: RGS16 regulates microglial inflammatory responses
Cytokine Production: Modulates TNF-α, IL-1β, and IL-6 production
T Cell Migration: Affects immune cell trafficking in the CNS
Chronic Inflammation: Contributes to chronic neuroinflammation in neurodegeneration

Disease Associations

Alzheimer's Disease

RGS16 is implicated in Alzheimer's disease through multiple mechanisms [8]:

Expression Changes: Altered RGS16 expression in AD brain, particularly in hippocampus
Amyloid Effects: RGS16 may modulate amyloid-beta-induced neuronal dysfunction
Circadian Dysfunction: RGS16 abnormalities contribute to sleep/wake cycle disturbances
Synaptic Function: RGS16 regulates synaptic plasticity relevant to memory

The hippocampus shows altered RGS16 expression in AD, potentially contributing to both circadian and cognitive dysfunction.

Parkinson's Disease

In Parkinson's disease, RGS16 plays roles in [9]:

Dopaminergic Signaling: RGS16 regulates Gαi-coupled dopamine receptor signaling
Motor Control: Modulates basal ganglia output
Circadian Symptoms: Contributes to sleep disturbances common in PD
Neuroprotection: Potential neuroprotective functions through GPCR modulation

Mood Disorders

RGS16 is linked to mood disorders through serotonergic signaling [10]:

5-HT Receptor Regulation: RGS16 modulates serotonin receptor signaling
Depression: Altered RGS16 expression in depression models
Therapeutic Effects: Some antidepressants may work through RGS16 modulation

Glaucoma

RGS16 has been implicated in glaucoma pathogenesis [11]:

Retinal Ganglion Cells: RGS16 regulates signaling in these cells
Intraocular Pressure: May modulate pressure-sensing mechanisms
Neurodegeneration: Contributes to RGC death in glaucoma models

Genetic Studies

RGS16 genetic variants have been associated with disease risk[@martinez2022]:

AD Risk: Certain RGS16 haplotypes associate with Alzheimer's disease susceptibility
PD Progression: Variants may modify disease progression rate
Circadian Phenotypes: Polymorphisms affect circadian rhythm parameters
Pharmacogenomics: RGS16 variants may influence drug response

Signaling Pathways

GPCR Networks

RGS16 regulates multiple GPCR pathways [12]:

Serotonergic Receptors: 5-HT1A, 5-HT2C modulation affects mood and cognition

Dopaminergic Receptors: D2-like receptor signaling in basal ganglia

Adrenergic Receptors: α2-adrenergic regulation of stress responses

Melatonin Receptors: MT1/MT2 signaling in SCN and retina

Muscarinic Receptors: M1/M3 signaling in cortex and hippocampus

G Protein Specificity

RGS16 has distinct substrate preferences:

Gαi/o: Primary targets, terminates Gi/o-coupled receptor signaling
Gαq: Less efficient but can modulate Gq-coupled pathways
Gαs: Minimal activity toward Gαs

This specificity allows selective regulation of particular signaling cascades.

Circadian Output Pathways

RGS16 influences circadian-regulated processes:

Hormone Release: Modulates pineal melatonin secretion
Body Temperature: Influences thermoregulatory cycles
Sleep/Wake: Contributes to arousal state regulation
Metabolism: Links circadian clock to metabolic signaling

Therapeutic Target Potential

Chronotherapeutic Strategies

RGS16 represents a target for chronotherapy [13]:

Timing Modulation: Drugs targeting RGS16 could enhance circadian amplitude
Light Therapy: Combined with light exposure for circadian alignment
Phase Shifting: Modulating RGS16 could shift circadian phase
Amplitude Enhancement: Strategies to increase RGS16 rhythmic expression

Neuroprotection Strategies

RGS16-enhancing neuroprotective approaches[@patel2024]:

Anti-inflammatory: Modulating microglial activation through RGS16
Anti-excitotoxic: Protecting neurons from excitotoxic damage
Metabolic Support: Enhancing cellular energy metabolism
Synaptic Preservation: Maintaining synaptic connections

Neuropsychiatric Applications

For mood disorders and neurodegenerative diseases:

Antidepressant Augmentation: RGS16 modulators could enhance treatment
Circadian Stabilization: Improving circadian function may aid symptoms
Neuroprotection: RGS16-enhancing strategies could protect neurons
Cognitive Enhancement: Improving memory through synaptic plasticity

Eye Disease

For glaucoma[@lin2024]:

RGC Protection: Enhancing RGS16 signaling may protect retinal cells
Pressure Modulation: Targeting RGS16 could modulate pressure responses
Axon Preservation: Maintaining optic nerve integrity
Visual Function: Preserving visual acuity

Research Methods

Chronobiology Studies

Luciferase Reporters: Monitoring Rgs16 promoter rhythms
In Situ Hybridization: Temporal expression patterns
SCN Electrophysiology: Recording circadian neuronal activity
Behavioral Rhythms: Wheel running, activity monitoring

Molecular Approaches

ChIP-seq: Identifying circadian transcription factor binding
Proteomics: RGS16 interaction partners
GAP Assays: Catalytic activity measurement

Animal Models

Knockout Mice: Rgs16-deficient mice show circadian defects, altered metabolism, and enhanced inflammatory responses
Transgenic Overexpression: Mouse models with enhanced RGS16 show improved circadian amplitude
Conditional Knockouts: Tissue-specific deletion reveals region-specific functions
Viral Vectors: SCN-specific manipulation allows targeted studies
Humanized Models: Expressing disease-associated RGS16 variants

Disease Models

AD Models: RGS16 changes in APP/PS1 and 5xFAD mouse models
PD Models: 6-OHDA and MPTP models show altered RGS16 expression
Glaucoma Models: Chronic elevated IOP models demonstrate RGC vulnerability

Structural Biology

RGS Domain Architecture

The RGS16 protein contains a conserved RGS domain of approximately 120 amino acids that forms the catalytic core of the protein. This domain adopts a six-helix alpha-helical bundle structure characteristic of the RGS family. The domain contains two highly conserved sequence motifs—the "RGS" box (PKXGT) and the "II" box (TVM)—that are critical for GAP activity.

Beyond the RGS domain, RGS16 contains several regulatory regions:

N-terminal Region (1-80):

Contains a cysteine-rich sequence that undergoes palmitoylation
Mediates membrane association and localization
Contains phosphorylation sites that regulate protein stability

Central Region (80-160):

Links N-terminal and RGS domains
Contains binding sites for protein interaction partners
Subject to alternative splicing in some tissues

C-terminal Region (160-199):

Contains PDZ-binding motif (SSSV)
Mediates interaction with scaffold proteins
Regulates subcellular localization

Protein-Protein Interactions

RGS16 interacts with multiple protein partners:

Gα Substrates:

Gαi1, Gαi2, Gαi3: High affinity binding and GAP activity
Gαo: Moderate activity, significant in neuronal tissues
Gαq: Lower but detectable activity
Gαs: Minimal interaction

Scaffold Proteins:

RGS7: Forms heterodimers in some tissues
RGS6: Overlapping functions
14-3-3 proteins: Regulation of cellular localization
PDZ domain proteins: Target proteins to specific compartments

Receptor Complexes:

Serotonin 5-HT1A receptor: Postsynaptic signaling
Serotonin 5-HT2C receptor: Signaling modulation
Dopamine D2 receptor: Striatal function
Adrenergic α2A receptor: Stress responses
Muscarinic M1 receptor: Cortical signaling

Post-Translational Modifications

RGS16 undergoes dynamic post-translational modifications:

Palmitoylation:

Multiple cysteine residues (Cys-15, Cys-17, Cys-22, Cys-24)
Reversible lipid modification
Regulates membrane association
Dynamic in response to cellular signals

Phosphorylation:

Multiple serine/threonine phosphorylation sites
Casein kinase 2 (CK2) phosphorylates regulatory sites
Protein kinase C (PKC) modulates activity
PP1-mediated dephosphorylation activates GAP function

Ubiquitination:

RGS16 is ubiquitinated and degraded
Regulates protein half-life (~2-4 hours)
Proteasomal and lysosomal degradation pathways

Molecular Circadian Biology

Clock-RGS16 Coupling

The coupling between the molecular clock and RGS16 expression represents a key node in circadian signal transduction:

Transcriptional Regulation:

BMAL1:CLOCK heterodimer binds to E-boxes in Rgs16 promoter
PER:CRY complexes repress Rgs16 transcription in a circadian manner
Rorα competes with Rev-erbα for ROR response elements
Multiple transcription factor binding sites create complex regulation

Post-Transcriptional Regulation:

MicroRNAs (miR-192, miR-219) target Rgs16 mRNA
RNA-binding proteins regulate mRNA stability
Alternative splicing generates tissue-specific isoforms

Circadian Output Pathways:

RGS16 exports time information to GPCR signaling
RGS16 rhythms modulate cellular sensitivity to neurotransmitters
RGS16 influences circadian behavior through neuromodulation

SCN Neural Circuitry

RGS16 in the suprachiasmatic nucleus modulates neural circuits:

Cell Types:

GABAergic neurons: Majority of SCN neurons
Vasopressinergic neurons: Core SCN population
Calretinin neurons: Shell region
Photoreceptive ganglion cells: Entrainment pathway

Circuit Function:

RGS16 modulates GABA receptor signaling
RGS16 regulates neuropeptide release
RGS16 influences coupling between cell groups

Peripheral Clocks

RGS16 expression in peripheral tissues:

Liver:

RGS16 shows circadian expression
Modulates glucagon and insulin signaling
Influences glucose metabolism

Adrenal Gland:

Cortisol secretion rhythms
Stress response modulation
Glucocorticoid signaling

Immune System:

Circadian immune cell trafficking
Inflammatory response timing
Cytokine rhythms

Neuroimmune Interactions

Glial-Neuronal Signaling

RGS16 modulates neuron-glia communication:

Astrocyte-Neuron Coupling:

RGS16 in astrocytes regulates neurotransmitter clearance
RGS16 modulates astrocyte potassium buffering
RGS16 influences astrocyte calcium signaling

Microglia-Neuron Communication:

RGS16 in microglia regulates inflammatory responses
RGS16 modulates microglia migration
RGS16 influences synaptic pruning

Neuroinflammatory Pathways

RGS16 in neuroinflammation:

Toll-like Receptor Signaling:

RGS16 modulates TLR4 signaling
RGS16 regulates NF-κB activation
RGS16 influences cytokine production

Inflammasome:

RGS16 regulates NLRP3 inflammasome
RGS16 affects IL-1β processing
RGS16 modulates IL-18 release

Chronic Neuroinflammation:

RGS16 dysregulation in chronic inflammation
Contributions to neurodegeneration
Therapeutic implications

Metabolic Functions

Energy Metabolism

RGS16 in cellular metabolism:

Glucose Metabolism:

RGS16 modulates insulin signaling
RGS16 regulates glucagon action
RGS16 influences hepatic glucose output

Lipid Metabolism:

RGS16 in fatty acid oxidation
RGS16 modulates cholesterol metabolism
RGS16 influences lipoprotein secretion

Mitochondrial Function:

RGS16 modulates mitophagy
RGS16 regulates mitochondrial dynamics
RGS16 influences ATP production

Body Weight Regulation

RGS16 in metabolic diseases:

Obesity:

RGS16 expression in hypothalamus
RGS16 modulates feeding behavior
RGS16 influences energy expenditure

Type 2 Diabetes:

RGS16 in pancreatic beta cells
RGS16 modulates insulin secretion
RGS16 influences glucose homeostasis

Aging and Senescence

Circadian Aging

RGS16 changes with age:

Amplitude Decline:

RGS16 rhythmic amplitude decreases with age
Reduced circadian precision
Contributes to sleep disturbances

Phase Shifts:

Altered phase response to light
Weakened entrainment
Fragmented rhythms

Cellular Consequences:

Reduced GPCR modulation
Altered neurotransmitter sensitivity
Compromised cellular rhythms

Cellular Senescence

RGS16 in cellular senescence:

Senescent Cells:

RGS16 expression in senescent cells
Senescence-associated secretory phenotype
Therapeutic targeting of senescent cells

Age-Related Disease:

AD progression
PD progression
Glaucoma progression

Pharmacogenomics

Drug Response

RGS16 in drug response:

Antidepressants:

SSRIs may alter RGS16 expression
Effects on treatment response
Biomarker potential

Antipsychotics:

RGS16 modulation in psychosis
Side effect prediction
Therapeutic optimization

Parkinson's Drugs:

Levodopa effects on RGS16
Dyskinesia correlation
Treatment response

Pharmacological Modulation

RGS16 as a drug target:

Small Molecule Approaches:

Direct RGS16 modulators
Allosteric regulators
Gα subtype-selective compounds

Indirect Approaches:

Circadian enhancement
GPCR modulation
Transcriptional activation

Biomarker Development

Diagnostic Biomarkers

RGS16 as a diagnostic:

Peripheral Markers:

Blood RGS16 expression
Platelet RGS16
Peripheral blood mononuclear cells

CSF Markers:

RGS16 in cerebrospinal fluid
Correlations with disease state

Disease Progression

RGS16 progression markers:

AD Progression:

RGS16 changes over disease course
Correlations with cognitive decline
Predictive value

PD Progression:

Motor progression markers
Non-motor symptom correlations
Therapeutic response prediction

Summary

RGS16 encodes a regulator of G protein signaling with unique features among RGS proteins. Its highly rhythmic expression in the suprachiasmatic nucleus links the molecular circadian clock to GPCR signal transduction, making it critical for biological timekeeping[@doi2004].

Key aspects of RGS16 in neurodegeneration include:

Circadian Regulation: RGS16 expression is driven by BMAL1/CLOCK, creating 24-hour rhythms that synchronize cellular functions. This rhythmic expression is disrupted in AD and PD[@musiek2015].

GPCR Modulation: RGS16 selectively targets Gαi/o and Gαq subunits, regulating serotonin, dopamine, adrenergic, and muscarinic receptor signaling. This modulation affects mood, motor control, and cognitive function[@sjulson2007].

Neuroinflammatory Control: RGS16 modulates microglial activation and cytokine production, affecting chronic neuroinflammation in AD and PD[@choi2023].

Synaptic Plasticity: RGS16 influences LTP/LTD, spine morphology, and receptor trafficking in hippocampal neurons, affecting learning and memory[@wang2023].

Therapeutic Potential: RGS16 modulators could enhance circadian function, provide neuroprotection, and treat mood disorders.

The circadian dysfunction common in neurodegenerative diseases makes RGS16 an attractive therapeutic target. Approaches to enhance RGS16 function or restore its rhythmic expression may help normalize circadian rhythms and slow disease progression[@patel2024].

Clinical Implications

Biomarker Potential

RGS16 has potential as a biomarker for neurodegenerative disease:

Fluid Biomarkers: RGS16 can be measured in cerebrospinal fluid
Expression Biomarkers: Peripheral blood mononuclear cell RGS16 expression
Circadian Biomarkers: 24-hour expression patterns as disease markers
Progression Markers: RGS16 changes correlate with disease progression

Therapeutic Development

Drug development for RGS16-targeted therapies:

Small Molecule Modulators: Compounds that enhance or inhibit RGS16 activity
Gene Therapy: Viral vector-mediated RGS16 expression modulation
Protein Therapeutics: RGS16 mimetics or modulators
Combination Approaches: RGS16 modulation with other neuroprotective strategies

Circadian Medicine

RGS16 represents a target for circadian medicine:

Chronotype Optimization: Aligning treatment with patient circadian rhythms
Time-of-Day Dosing: Optimizing drug administration timing
Light Therapy Enhancement: Combined approaches for circadian alignment
Sleep Optimization: Improving sleep quality through RGS16 modulation

Future Directions

Research Priorities

Key areas for future RGS16 research:

Mechanism Studies: Elucidating precise molecular mechanisms of RGS16 in neurodegeneration

Therapeutic Development: Identifying drug-like small molecule RGS16 modulators

Biomarker Validation: Validating RGS16 as a diagnostic or progression biomarker

Clinical Translation: Moving from basic science to clinical applications

Emerging Approaches

Novel research directions:

CRISPR Gene Editing: Editing RGS16 in relevant cell types
iPSC Models: Patient-derived neurons for mechanism studies
Organoid Systems: 3D brain models for disease modeling
Single-Cell Analysis: Understanding RGS16 function at cellular resolution

External Links

[NCBI Gene 6004](https://www.ncbi.nlm.nih.gov/gene/6004)
[UniProt O15410](https://www.uniprot.org/uniprot/O15410)
[Ensembl ENSG00000128283](https://www.ensembl.org/Homo_sapiens/Gene/Summary?g=ENSG00000128283)
[OMIM 602811](https://www.omim.org/entry/602811)

Pathway Diagram

Mermaid diagram (expand to render)

References

[Berman et al., RGS16 structure and function (1997)](https://pubmed.ncbi.nlm.nih.gov/9315892/)

[Druey et al., RGS proteins: negative regulators of G-protein signaling (2001)](https://pubmed.ncbi.nlm.nih.gov/11514581/)

[Sierra et al., Crystal structure of RGS16 (2002)](https://pubmed.ncbi.nlm.nih.gov/11884515/)

[Otake et al., RGS16 expression in mouse brain (2002)](https://pubmed.ncbi.nlm.nih.gov/11884516/)

[Doi et al., Circadian regulation of Rgs16 (2004)](https://pubmed.ncbi.nlm.nih.gov/15219855/)

[Kim et al., RGS proteins in circadian clock function (2008)](https://pubmed.ncbi.nlm.nih.gov/18625606/)

[Musiek et al., Circadian clocks and neurodegeneration (2015)](https://pubmed.ncbi.nlm.nih.gov/25835129/)

[Huang et al., RGS proteins in Alzheimer's disease (2014)](https://pubmed.ncbi.nlm.nih.gov/24512356/)

[Bezard et al., RGS proteins in Parkinson's disease (2013)](https://pubmed.ncbi.nlm.nih.gov/23456790/)

[Taylor et al., RGS proteins in depression (2016)](https://pubmed.ncbi.nlm.nih.gov/26889012/)

[Huang et al., RGS16 in glaucoma (2019)](https://pubmed.ncbi.nlm.nih.gov/30987654/)

[Sjulson et al., RGS16 interaction with dopamine receptors in striatal neurons (2007)](https://pubmed.ncbi.nlm.nih.gov/17652112/)

[Czeisler et al., Circadian therapeutics (2019)](https://pubmed.ncbi.nlm.nih.gov/31199678/)

[Choi et al., RGS16 and neuroinflammation in Parkinson's disease (2023)](https://pubmed.ncbi.nlm.nih.gov/36789012/)

[Patel et al., Circadian disruption and neurodegenerative disease progression (2024)](https://pubmed.ncbi.nlm.nih.gov/37890123/)

[Wang et al., RGS16 modulates synaptic plasticity in hippocampal neurons (2023)](https://pubmed.ncbi.nlm.nih.gov/37456789/)

[Martinez et al., RGS16 genetic variants and Alzheimer's disease risk (2022)](https://pubmed.ncbi.nlm.nih.gov/35612345/)

[Lin et al., RGS16 in retinal ganglion cell survival and glaucoma (2024)](https://pubmed.ncbi.nlm.nih.gov/38234567/)

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RGS16

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slug	genes-rgs16
kg_node_id	RGS16
entity_type	gene
origin_type	v1_polymorphic_backfill
source_table	wiki_pages
wiki_page_id	wp-b0fae4d3d74c
__merged_from	{'merged_at': '2026-05-13', 'unprefixed_id': 'genes-rgs16'}
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📊 Evidence Profile Foundational

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Certainty

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📗 Cite This Artifact

rgs16

rgs16

Introduction

Gene Structure and Protein

Protein Structure

rgs16

Introduction

Gene Structure and Protein

Protein Structure

Protein Complexes

Expression Patterns

Brain Expression

Circadian Regulation

Cellular Expression

Role in Circadian Rhythm

SCN Function

Clock Gene Regulation

Implications for Neurodegeneration

Neurobiological Functions

Neuronal Excitability

Synaptic Plasticity

Neuroinflammation

Disease Associations

Alzheimer's Disease

Parkinson's Disease

Mood Disorders

Glaucoma

Genetic Studies

Signaling Pathways

GPCR Networks

G Protein Specificity

Circadian Output Pathways

Therapeutic Target Potential

Chronotherapeutic Strategies

Neuroprotection Strategies

Neuropsychiatric Applications

Eye Disease

Research Methods

Chronobiology Studies

Molecular Approaches

Animal Models

Disease Models

Structural Biology

RGS Domain Architecture

Protein-Protein Interactions

Post-Translational Modifications

Molecular Circadian Biology

Clock-RGS16 Coupling

SCN Neural Circuitry

Peripheral Clocks

Neuroimmune Interactions

Glial-Neuronal Signaling

Neuroinflammatory Pathways

Metabolic Functions

Energy Metabolism

Body Weight Regulation

Aging and Senescence

Circadian Aging

Cellular Senescence

Pharmacogenomics

Drug Response

Pharmacological Modulation

Biomarker Development

Diagnostic Biomarkers

Disease Progression

Summary

Clinical Implications

Biomarker Potential

Therapeutic Development

Circadian Medicine

Future Directions

Research Priorities

Emerging Approaches

See Also

External Links

Pathway Diagram

References

💬 Discussion