NTF5 (Neurotrophin-5), also known as NT-5 or BDNF-like growth factor, is a member of the neurotrophin family of growth factors. Like other neurotrophins, NTF5 promotes the survival and differentiation of specific neuronal populations in the central and peripheral nervous systems. While less studied than BDNF and NGF, NTF5 plays unique roles in neuronal development and may have therapeutic potential in neurodegenerative diseases.
| Property |
Value |
| Gene |
NTF5 |
| UniProt |
P34130 |
| Molecular Weight |
~13.5 kDa (dimeric form ~27 kDa) |
| Subcellular Localization |
Secreted, extracellular |
| Protein Family |
Neurotrophin family |
| Chromosome |
19p13.3 |
NTF5 shares structural homology with other neurotrophins:
- Cysteine knot motif: Three conserved disulfide bonds
- N-terminal region: Receptor-binding domain
- C-terminal domain: Dimerization interface
- Hairy loop: Variable region determining specificity
- ~50% amino acid identity with BDNF
- ~52% identity with NGF
- Distinct from NT-3 and NT-4
- Supports developing neurons
- Prevents apoptotic cell death
- Promotes neurite outgrowth
- Regulates synapse formation
- Induces neuronal differentiation
- Promotes axonal branching
- Controls dendritic morphology
- Supports glial cell development
- Primary receptor: TrkB (tropomyosin receptor kinase B)
- Alternative: TrkC (in some contexts)
- Mediates most neurotrophic effects
- Low-affinity binding
- Can mediate apoptosis in some contexts
- Modulates Trk receptor signaling
- Synaptic plasticity: Enhances LTP and memory
- Amyloid interaction: May protect against Aβ toxicity
- Tau pathology: Potential modulation
- Cholinergic neurons: Supports basal forebrain neurons
- Gene therapy approaches
- Small molecule mimetics
- Protein delivery
- Cell-based therapy
- Substantia nigra: Protects dopaminergic neurons
- Axonal integrity: Maintains striatal projections
- Neuroinflammation: Modulates glial responses
- Mitochondrial function: Supports neuronal metabolism
- AAV-mediated expression
- Exosome delivery
- Combinatorial approaches
- Peripheral neuropathy: Nerve regeneration
- Spinal cord injury: Axonal repair
- Stroke: Neuroprotection
- Depression: Mood regulation
- MAPK/ERK pathway: Neuronal differentiation
- PI3K/Akt pathway: Cell survival
- PLC-γ pathway: Calcium signaling
- CREB activation: Gene transcription
- Protein synthesis
- Gene expression changes
- Cytoskeletal modifications
- Synaptic plasticity
¶ Research and Therapeutic Development
- NTF5 knockout mice: Viable with subtle deficits
- Transgenic overexpression: Neuroprotection
- Viral vector delivery: Functional improvement
- AD mouse models: Memory improvement
- PD models: Dopaminergic protection
- Injury models: Regeneration promotion
- Peptide mimetics
- Small molecule agonists
- Gene therapy vectors
- Cell-based delivery