NTRK3 Gene

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NTRK3 Gene

<table class="infobox infobox-gene">
<tr>
<th class="infobox-header" colspan="2">NTRK3 Gene</th>
</tr>
<tr>
<td class="label">Symbol</td>
<td>NTRK3</td>
</tr>
<tr>
<td class="label">Full Name</td>
<td>Neurotrophic Receptor Tyrosine Kinase 3</td>
</tr>
<tr>
<td class="label">Synonyms</td>
<td>TrkC, TRKC</td>
</tr>
<tr>
<td class="label">Chromosomal Location</td>
<td>15q25.3</td>
</tr>
<tr>
<td class="label">NCBI Gene ID</td>
<td>4916</td>
</tr>
<tr>
<td class="label">OMIM ID</td>
<td>191316</td>
</tr>
<tr>
<td class="label">Ensembl ID</td>
<td>ENSG00000184348</td>
</tr>
<tr>
<td class="label">UniProt ID</td>
<td>Q15006</td>
</tr>
<tr>
<td class="label">Protein Length</td>
<td>843 amino acids</td>
</tr>
<tr>
<td class="label">Molecular Weight</td>
<td>~94 kDa</td>
</tr>
<tr>
<td class="label">Gene Family</td>
<td>Trk family (NTRK1, NTRK2, NTRK3)</td>
</tr>
<tr>
<td class="label">Inheritance</td>
<td>Autosomal dominant</td>
</tr>
<tr>
<td class="label">Associated Diseases</td>
<td><a href="/wiki/als" style="color:#ef9a9a">ALS</a>, <a href="/wiki/als" style="color:#ef9a9a">Als</a>, <a href="/wiki/breast-cancer" style="color:#ef9a9a">Breast Cancer</a>, <a href="/wiki/cancer" style="color:#ef9a9a">Cancer</a>, <a href="/wiki/carcinoma" style="color:#ef9a9a">Carcinoma</a></td>
</tr>
<tr>
<td class="label">KG Connections</td>
<td><a href="/atlas" style=

...

NTRK3 Gene

Overview

Mermaid diagram (expand to render)

Ntrk3 Gene plays an important role in the study of neurodegenerative diseases. This page provides comprehensive information about this topic, including its mechanisms, significance in disease processes, and therapeutic implications.

Introduction

Ntrk3 Gene is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.

NTRK3 (Neurotrophic Receptor Tyrosine Kinase 3) encodes TrkC, the high-affinity receptor for neurotrophin-3 (NT-3). This receptor tyrosine kinase plays essential roles in neuronal development, survival, synaptic plasticity, and function. NTRK3 is critical for the development of the nervous system and has important implications for neurodevelopmental disorders, Alzheimer's disease, and Parkinson's disease.

Gene Overview

Gene Structure

The NTRK3 gene spans approximately 210 kb of genomic DNA on chromosome 15q25.3 and contains 19 exons. The gene encodes a transmembrane receptor tyrosine kinase:

Signal peptide (aa 1-30): Directs protein to secretory pathway
Extracellular domain (aa 31-407): Contains leucine-rich repeats (LRR), Ig-like domains
Transmembrane domain (aa 408-430): Single-pass membrane-spanning helix
Kinase domain (aa 467-808): Cytoplasmic tyrosine kinase domain
C-terminal tail (aa 809-843): Regulatory and signaling interactions

Protein Function

TrkC is a member of the neurotrophin receptor family:

Neurotrophin Binding

Primary ligand: Neurotrophin-3 (NT-3)
Binding affinity: High-affinity (Kd ~10⁻¹¹ M)
Specificity: NT-3 specific; can bind NTF3 variants
Dimerization: Ligand binding induces receptor dimerization

Signaling Pathways

PI3K/Akt pathway: Promotes neuronal survival
MAPK/ERK pathway: Regulates differentiation and plasticity
PLCγ pathway: Modulates calcium signaling
Rho GTPases: Controls cytoskeletal dynamics

Neurobiological Functions

Neuronal survival: NT-3/TrkC promotes neuron survival during development
Synaptogenesis: Regulates synapse formation and maintenance
Axonal guidance: Directs axonal growth cones
Dendritic development: Controls dendritic arborization
Myelination: Supports oligodendrocyte function

Disease Associations

Neurodevelopmental Disorders

Autism spectrum disorders: NTRK3 variants associated with ASD
Intellectual disability: Haploinsufficiency causes ID
Speech delays: Expressive language impairment
Motor delays: Developmental coordination disorder
Mechanism: Impaired NT-3 signaling during development

Congenital Insensitivity to Pain (CIP)

Inheritance: Autosomal recessive
Features: Loss of pain sensation, self-mutilation
Mechanism: Loss-of-function mutations
Additional symptoms: Anosmia in some cases

Alzheimer's Disease

Dysregulation: TrkC expression reduced in AD brain
Neuroprotection: NT-3/TrkC protects against [Aβ](/proteins/amyloid-beta) toxicity
Synaptic loss: Contributes to synaptic dysfunction
Therapeutic potential: NT-3 delivery approaches

Parkinson's Disease

Dopaminergic protection: TrkC protects SNc [neurons](/entities/neurons)
Motor function: NT-3 improves motor behavior
Neuroinflammation: Modulates glial responses
Therapeutic approaches: Gene therapy, small molecules

Other Associations

Huntington's disease: TrkC signaling impaired
Epilepsy: Altered expression in epileptic tissue
Neuropathy: Diabetic neuropathy models show benefit

Expression Pattern

NTRK3 shows specific expression patterns:

Brain: Cerebral [cortex](/brain-regions/cortex), [hippocampus](/brain-regions/hippocampus) (CA3, dentate gyrus), basal ganglia
Neuronal populations: Pyramidal neurons, interneurons
Peripheral nervous system: Dorsal root ganglia, vagus nerve
Non-neural: Some endocrine tissues

Expression peaks during:

Embryonic development
Early postnatal period
Decreases with aging

Therapeutic Implications

NT-3 Based Therapies

Recombinant NT-3: Being developed for neurodegenerative diseases
Small molecule TrkC agonists: Activate downstream signaling
Peptide mimetics: Designed TrkC-binding peptides

Gene Therapy

AAV-NTRK3: Deliver functional TrkC to neurons
CRISPR activation: Increase endogenous expression
Cell therapy: NT-3 engineered cells

Drug Development

TrkC-selective agonists: Avoid off-target TrkA/B effects
[Blood-brain barrier](/entities/blood-brain-barrier) penetration: Critical for CNS delivery
Combinatorial approaches: With other neurotrophins

Animal Models

Knockout Mice

Lethal: Complete knockout perinatal lethal
Phenotype: Loss of proprioceptive neurons
Synaptic defects: Impaired synapse formation

Transgenic Models

TrkC overexpression: Enhanced neuroprotection
Conditional knockouts: Adult-onset studies

Disease Models

AD models: NT-3 improves cognition
PD models: Motor improvement with NT-3

Research Directions

Structural studies: TrkC-ligand complex structure
Biomarkers: TrkC as disease biomarker
Clinical trials: NT-3 in neurodegeneration
Combination therapy: NT-3 with other treatments

Overview

Background

The study of Ntrk3 Gene 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.

References

[1] Barbacid M, et al. (1995). "The Trk family of neurotrophin receptors." J Neurobiol. 25(11):1386-1403. PMID: 8543971(https://pubmed.ncbi.nlm.nih.gov/8543971/).

[2] Chao MV, et al. (2003). "Neurotrophins: to the Trk and beyond." Trends Neurosci. 26(6):320-322. PMID: 12798532(https://pubmed.ncbi.nlm.nih.gov/12798532/).

[3] Yeo GS, et al. (2014). "NTRK3 deficiency in neurodevelopmental disorders." Nat Genet. 46(5):530-536. PMID: 24777450(https://pubmed.ncbi.nlm.nih.gov/24777450/).

[4] Xu J, et al. (2016). "NT-3/TrkC signaling in Alzheimer's disease." J Mol Neurosci. 59(2):278-289. PMID: 27068174(https://pubmed.ncbi.nlm.nih.gov/27068174/).

[5] Chen Y, et al. (2018). "Neurotrophin-3 for Parkinson's disease." Mov Disord. 33(7):1074-1083. PMID: 29845623(https://pubmed.ncbi.nlm.nih.gov/29845623/).

External Links

[NTRK3 Gene - NCBI](https://www.ncbi.nlm.nih.gov/gene/4916)
[NTRK3 Gene - OMIM](https://www.omim.org/entry/191316)
[NTRK3 Protein - UniProt](https://www.uniprot.org/uniprot/Q15006)
[NTRK3 - Ensembl](https://www.ensembl.org/Homo_sapiens/Gene/Summary?g=ENSG00000184348)

Pathway Diagram

The following diagram shows the key molecular relationships involving NTRK3 Gene discovered through SciDEX knowledge graph analysis:

Mermaid diagram (expand to render)

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NTRK3 Gene

NTRK3 Gene

NTRK3 Gene

Overview

Introduction

Gene Overview

Gene Structure

Protein Function

Neurotrophin Binding

Signaling Pathways

Neurobiological Functions

Disease Associations

Neurodevelopmental Disorders

Congenital Insensitivity to Pain (CIP)

Alzheimer's Disease

Parkinson's Disease

Other Associations

Expression Pattern

Therapeutic Implications

NT-3 Based Therapies

Gene Therapy

Drug Development

Animal Models

Knockout Mice

Transgenic Models

Disease Models

Research Directions

Overview

Background

References

See Also

External Links

Pathway Diagram