Gene Symbol: NTRK3 (formerly TRKC) [1]
Full Name: Neurotrophic Receptor Tyrosine Kinase 3 [2]
Chromosomal Location: 15q25.3 [3]
NCBI Gene ID: 4916 [4]
OMIM: 191315 [5]
UniProt: Q15006 [6]
Ensembl ID: ENSG00000140538 [7]
The NTRK3 gene encodes the Tropomyosin receptor kinase C (TrkC), the high-affinity receptor for neurotrophin-3 (NT-3). TrkC plays essential roles in nervous system development, particularly in the formation and maintenance of sensory and motor neuronal circuits. Unlike TrkA (NTRK1) and TrkB (NTRK2), which primarily bind NGF and BDNF respectively, TrkC has unique functions in proprioception, nociception, and cognitive development. Dysregulation of TrkC signaling has been implicated in various neurological conditions including neurodevelopmental disorders, epilepsy, and certain neurodegenerative diseases. [8]
The NTRK3 gene spans approximately 310 kb on chromosome 15q25.3 and consists of 26 exons. Key transcript variants include:
TrkC expression is highest in:
TrkC contains:
TrkC is the primary receptor for Neurotrophin-3 (NT-3) with high specificity. NT-3 binding induces receptor dimerization and autophosphorylation, activating downstream signaling cascades identical to those of TrkA and TrkB.
During development, TrkC/NT-3 signaling:
TrkC is essential for:
NT-3/TrkC signaling contributes to:
| Approach | Stage | Indication |
|---|---|---|
| NT-3 protein | Clinical trials | Peripheral neuropathy |
| Gene therapy | Preclinical | Spinal cord injury |
| Small molecule agonists | Discovery | Cognitive impairment |
| Partner | Type | Function |
|---|---|---|
| NTF3 (NT-3) | Ligand | Primary activator |
| NTRK1 | Paralogue | Shared signaling |
| NTRK2 | Paralogue | Cross-talk |
| P75NTR | Co-receptor | Modulation |
The study of Trkc 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.