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
<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="color:#4fc3f7">49 edges</a></td>
</tr>
</table>
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
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.
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
<sup>[1]</sup> 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/).
<sup>[2]</sup> 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/).
<sup>[3]</sup> 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/).
<sup>[4]</sup> 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/).
<sup>[5]</sup> 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/).
See Also
- Neurotrophin-3
- [TrkC Protein](/proteins/trkc-protein)
- [Neurodevelopmental Disorders](/diseases/neurodevelopmental-disorders)
- [Alzheimer's Disease](/diseases/alzheimers-disease)
- [Parkinson's Disease](/diseases/parkinsons-disease)
- [Neurotrophin Signaling](/mechanisms/neurotrophin-signaling)
- Congenital Insensitivity to Pain
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)