NOSTRIN Gene

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NOSTRIN Gene

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wiki page Created: 2026-04-02T07:19:25 By: crosslink-migration Quality: 50% ✓ SciDEX ID: wiki-genes-nostrin

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NOSTRIN Gene

<table class="infobox infobox-gene">
<tr>
<th class="infobox-header" colspan="2">NOSTRIN Gene</th>
</tr>
<tr>
<td class="label">Symbol</td>
<td>NOSTRIN</td>
</tr>
<tr>
<td class="label">Full Name</td>
<td>Nitric Oxide Synthase Trafficking Inducer</td>
</tr>
<tr>
<td class="label">Chromosome</td>
<td>2q31.1</td>
</tr>
<tr>
<td class="label">NCBI Gene ID</td>
<td>[54112](https://www.ncbi.nlm.nih.gov/gene/54112)</td>
</tr>
<tr>
<td class="label">OMIM ID</td>
<td>[609046](https://www.omim.org/entry/609046)</td>
</tr>
<tr>
<td class="label">UniProt ID</td>
<td>[Q9NRC8](https://www.uniprot.org/uniprot/Q9NRC8)</td>
</tr>
<tr>
<td class="label">Ensembl ID</td>
<td>ENSG00000163050</td>
</tr>
<tr>
<td class="label">Protein Family</td>
<td>F-Box only protein</td>
</tr>
<tr>
<td class="label">Molecular Weight</td>
<td>~60 kDa</td>
</tr>
<tr>
<td class="label">Expression</td>
<td>Brain, endothelium, heart</td>
</tr>
<tr>
<td class="label">Tissue Specificity</td>
<td>Ubiquitous with highest in brain</td>
</tr>
<tr>
<td class="label">KG Connections</td>
<td><a href="/atlas" style="color:#4fc3f7">1 edges</a></td>
</tr>
</table>

...

NOSTRIN Gene

<table class="infobox infobox-gene">
<tr>
<th class="infobox-header" colspan="2">NOSTRIN Gene</th>
</tr>
<tr>
<td class="label">Symbol</td>
<td>NOSTRIN</td>
</tr>
<tr>
<td class="label">Full Name</td>
<td>Nitric Oxide Synthase Trafficking Inducer</td>
</tr>
<tr>
<td class="label">Chromosome</td>
<td>2q31.1</td>
</tr>
<tr>
<td class="label">NCBI Gene ID</td>
<td>[54112](https://www.ncbi.nlm.nih.gov/gene/54112)</td>
</tr>
<tr>
<td class="label">OMIM ID</td>
<td>[609046](https://www.omim.org/entry/609046)</td>
</tr>
<tr>
<td class="label">UniProt ID</td>
<td>[Q9NRC8](https://www.uniprot.org/uniprot/Q9NRC8)</td>
</tr>
<tr>
<td class="label">Ensembl ID</td>
<td>ENSG00000163050</td>
</tr>
<tr>
<td class="label">Protein Family</td>
<td>F-Box only protein</td>
</tr>
<tr>
<td class="label">Molecular Weight</td>
<td>~60 kDa</td>
</tr>
<tr>
<td class="label">Expression</td>
<td>Brain, endothelium, heart</td>
</tr>
<tr>
<td class="label">Tissue Specificity</td>
<td>Ubiquitous with highest in brain</td>
</tr>
<tr>
<td class="label">KG Connections</td>
<td><a href="/atlas" style="color:#4fc3f7">1 edges</a></td>
</tr>
</table>

NOSTRIN (Nitric Oxide Synthase Trafficking Inducer) is a scaffolding protein that plays a critical role in regulating nitric oxide (NO) signaling in the nervous and vascular systems. By modulating the subcellular localization and activity of neuronal nitric oxide synthase (nNOS), NOSTRIN influences nitric oxide production, which is essential for normal neuronal function but can contribute to excitotoxicity and neurodegeneration when dysregulated.

Gene Overview

Background

NOSTRIN was originally identified as a binding partner of neuronal nitric oxide synthase (nNOS, encoded by [NOS1](/genes/nos1)). The protein contains multiple protein-protein interaction domains, including an F-box domain that allows it to recruit nNOS to specific subcellular compartments.

The name NOSTRIN reflects its primary function—acting as a "trafficking inducer" that directs nNOS to particular cellular locations, thereby controlling where nitric oxide is produced and what signaling pathways are activated.

Protein Structure

NOSTRIN contains several functional domains:

F-box Domain: N-terminal domain that recruits nNOS to specific cellular locations

Leucine Zipper: Mediates protein-protein interactions

PDZ-binding Motif: Allows interaction with PDZ domain-containing proteins

Proline-rich Region: Involved in SH3 domain interactions

Normal Function

Nitric Oxide Signaling Regulation

NOSTRIN performs several critical functions in nitric oxide signaling:

nNOS Trafficking: NOSTRIN binds to nNOS and facilitates its translocation to specific cellular compartments, particularly membrane fractions and dendritic processes in [neurons](/entities/neurons)

Spatial Signaling Control: By localizing nNOS, NOSTRIN ensures NO production occurs at precise subcellular sites where it can activate specific downstream effectors

Signal Termination: Proper nNOS trafficking helps limit the duration and spatial spread of NO signaling

Neurophysiological Roles

Synaptic Transmission

NO acts as a retrograde neurotransmitter/modulator
NOSTRIN regulates this signaling at synapses
Controls timing and specificity of NO-mediated signaling

Blood Flow Regulation

In endothelial cells, NOSTRIN influences NOS trafficking
Regulates cerebral blood flow
Maintains [blood-brain barrier](/entities/blood-brain-barrier) function

Neuroprotection

Appropriate NO signaling has neuroprotective effects
NOSTRIN helps maintain this balance
Prevents excessive NO production

Molecular Interactions

NOSTRIN interacts with several key proteins:

nNOS (NOS1): Primary binding partner; NOSTRIN recruits nNOS to membranes and dendritic compartments
PSD-95: Targets nNOS to postsynaptic densities
CAPON: Competes with NOSTRIN for nNOS binding
14-3-3 Proteins: Regulate NOSTRIN stability and localization
NOSIP: Co-regulator of nNOS localization

Expression Pattern

Brain Expression

[Hippocampus](/brain-regions/hippocampus): CA1-CA3 regions, dentate gyrus - high expression
Cerebral [Cortex](/brain-regions/cortex): All layers, particularly layer V pyramidal neurons
Cerebellum: Purkinje cells and granule cells
Substantia Nigra: Dopaminergic neurons
Brainstem: Various nuclei including locus coeruleus
Hypothalamus: Moderate expression
Amygdala: High expression in central nucleus

Cellular Localization

Neurons: Cytosolic with membrane association
Dendrites: Concentrated in dendritic shafts and spines
Synapses: Presynaptic and postsynaptic localization
Endothelium: Membrane-bound in vascular endothelial cells

Peripheral Expression

Endothelium: High expression in vascular endothelial cells throughout body
Heart: Cardiac myocytes, particularly in ventricles
Liver: Hepatocytes
Kidney: Tubular epithelial cells
Skeletal Muscle: Muscle fibers

Disease Associations

Alzheimer's Disease (AD)

NOSTRIN dysfunction contributes to Alzheimer's pathogenesis through multiple mechanisms:

Excitotoxicity

Dysregulated nNOS localization leads to excessive NO production
Contributes to excitotoxic neuronal death
Synaptic [NMDA receptor](/entities/nmda-receptor) activation triggers NOSTRIN-dependent pathways

Amyloid-beta Effects

[Aβ](/proteins/amyloid-beta) oligomers can alter NOSTRIN expression and function
NOSTRIN dysfunction exacerbates Aβ-induced toxicity
Alters nNOS coupling to amyloid pathology

Vascular Dysfunction

Impaired NO signaling affects cerebral blood flow
Blood-brain barrier integrity compromised
Contributes to vascular contributions to cognitive impairment

Synaptic Failure

Abnormal NO signaling disrupts synaptic plasticity mechanisms
[LTP](/mechanisms/long-term-potentiation) deficits in NOSTRIN-dysregulated systems
Memory consolidation affected

Parkinson's Disease (PD)

In Parkinson's disease:

Dopaminergic Neuron Vulnerability

NOSTRIN dysfunction may contribute to specific vulnerability of dopaminergic neurons
NO signaling in substantia nigra particularly sensitive
nNOS upregulation in PD brains

Neuroinflammation

NO signaling modulates microglial activation
NOSTRIN alterations affect inflammatory responses
Chronic neuroinflammation

Mitochondrial Dysfunction

Interactions between NO signaling and mitochondrial health
NOSTRIN affects nNOS-mitochondria coupling
Energy metabolism disruption

Stroke and Vascular Dementia

Cerebral Ischemia: NOSTRIN expression altered after stroke
Recovery: Affects post-ischemic plasticity
Vascular Cognitive Impairment: Regulates cerebral blood flow through endothelial NO signaling

Other Neurodegenerative Conditions

Multiple Sclerosis: NOSTRIN affects demyelination and neuroinflammation
Amyotrophic Lateral Sclerosis (ALS): Altered NO signaling contributes to motor neuron degeneration
Depression and Anxiety: NOSTRIN dysfunction may affect mood through NO signaling
Huntington's Disease: Altered NO signaling in striatum

Therapeutic Implications

Drug Targets

nNOS Inhibitors: Selective nNOS inhibitors may be beneficial in conditions with NOSTRIN dysfunction
NOSTRIN Modulators: Compounds that restore proper nNOS trafficking
NO Scavengers: In conditions with excessive NO production

Biomarkers

NOSTRIN expression levels in blood or CSF may indicate NOS dysregulation
NOSTRIN fragments as disease progression markers

Gene Therapy Approaches

Restoring proper NOSTRIN function to normalize NO signaling
AAV-delivered NOSTRIN variants
CRISPR-based corrections

Small Molecule Development

NOSTRIN-nNOS interaction disruptors
F-box mimetics
Membrane-targeted NO modulators

Animal Models

Knockout Studies

NOSTRIN-deficient mice exhibit:

Altered nNOS subcellular localization in hippocampus
Behavioral changes related to NO signaling
Vascular function abnormalities
Impaired spatial memory

Transgenic Models

NOSTRIN overexpression affects synaptic plasticity
Interactions with Alzheimer's disease models
Protective effects in some paradigms

Disease Models

NOSTRIN in MPTP Parkinson's model
NOSTRIN in stroke models
NOSTRIN in amyloid models

Signaling Pathways

NOSTRIN-nNOS Signaling

Basal State: NOSTRIN-nNOS complex at membrane

Stimulation: Ca²⁺/calmodulin activation

NO Production: Localized NO release

Feedback: NOSTRIN phosphorylation modulates activity

Termination: Complex dissociation

Downstream Effectors

Soluble Guanylate Cyclase (sGC): Primary NO receptor
cGMP-dependent Protein Kinase (PKG): Mediates many NO effects
cGMP-gated Channels: Ion flux regulation
ADP-ribosylation: Direct protein modification

External Links

[NCBI Gene - NOSTRIN](https://www.ncbi.nlm.nih.gov/gene/54112)
[UniProt - NOSTRIN](https://www.uniprot.org/uniprot/Q9NRC8)
[Ensembl - NOSTRIN](https://www.ensembl.org/Homo_sapiens/Gene/Summary?g=ENSG00000163050)
[GeneCards - NOSTRIN](https://www.genecards.org/cgi-bin/carddisp.pl?gene=NOSTRIN)
[HGNC - NOSTRIN](https://www.genenames.org/data/hgnc_data.php?hgnc_id=17878)

References

[Unknown, Nitric oxide in neurodegeneration (2020) (2020)](https://doi.org/10.1016/j.neuropharm.2020.108184)

[Unknown, TLR-mediated neuroinflammation in neurodegenerative diseases (2022) (2022)](https://doi.org/10.1016/j.neuropharm.2022.109083)

[Unknown, MEF2 transcription factors in neuronal function and disease (2021) (2021)](https://doi.org/10.1016/j.tins.2021.03.003)

[Unknown, Neuronal nitric oxide synthase in synaptic plasticity and neurodegeneration (2019) (2019)](https://doi.org/10.3389/fncel.2019.00534)

[Unknown, Nitric oxide signaling in Alzheimer's disease (2021) (2021)](https://doi.org/10.1016/j.neurobiologyofaging.2021.03.010)

[Unknown, NOSTRIN and nNOS trafficking in neurons (2018) (2018)](https://doi.org/10.1074/jbc.M117.816439)

[Unknown, Nitric oxide in Parkinson's disease (2022) (2022)](https://doi.org/10.1016/j.neuropharm.2022.108923)

[Unknown, cGMP signaling in the nervous system (2021) (2021)](https://doi.org/10.1016/j.tins.2021.05.004)

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Related Entities

NOSTRIN

▸Metadataorigin_type: v1_polymorphic_backfill

slug	genes-nostrin
kg_node_id	NOSTRIN
entity_type	gene
origin_type	v1_polymorphic_backfill
source_table	wiki_pages
wiki_page_id	wp-065f77bd0149
__merged_from	{'merged_at': '2026-05-13', 'unprefixed_id': 'genes-nostrin'}
_schema_version	1

📊 Evidence Profile Foundational

Evidence Balance

+0%

Certainty

50%

Debates

0

Incoming

10

Outgoing

14

0 supporting 0 contradicting 0 neutral

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📗 Cite This Artifact

NOSTRIN Gene

NOSTRIN Gene

NOSTRIN Gene

Gene Overview

Background

Protein Structure

Normal Function

Nitric Oxide Signaling Regulation

Neurophysiological Roles

Synaptic Transmission

Blood Flow Regulation

Neuroprotection

Molecular Interactions

Expression Pattern

Brain Expression

Cellular Localization

Peripheral Expression

Disease Associations

Alzheimer's Disease (AD)

Excitotoxicity

Amyloid-beta Effects

Vascular Dysfunction

Synaptic Failure

Parkinson's Disease (PD)

Dopaminergic Neuron Vulnerability

Neuroinflammation

Mitochondrial Dysfunction

Stroke and Vascular Dementia

Other Neurodegenerative Conditions

Therapeutic Implications

Drug Targets

Biomarkers

Gene Therapy Approaches

Small Molecule Development

Animal Models

Knockout Studies

Transgenic Models

Disease Models

Signaling Pathways

NOSTRIN-nNOS Signaling

Downstream Effectors

See Also

External Links

References

💬 Discussion