Vti1A 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.
VTI1A (Vesicular Transport Interactor 1A) is a soluble N-ethylmaleimide-sensitive factor attachment protein receptor (SNARE) protein involved in intracellular membrane trafficking. Originally identified as a component of the vesicle transport machinery, VTI1A has emerged as an important protein in synaptic function and has been implicated in neurodegenerative diseases through its role in autophagy, lysosomal trafficking, and protein homeostasis. This page covers the VTI1A gene structure, protein function, and its involvement in Alzheimer's Disease, Parkinson's Disease, and other neurodegenerative conditions.
| Property |
Value |
| Gene Symbol |
VTI1A |
| Gene Name |
Vesicle Transport Interactor 1A |
| Chromosomal Location |
10q25.1 |
| NCBI Gene ID |
143187 |
| UniProt ID |
Q9MPM7 |
| Protein Family |
SNARE family (Qc-SNARE) |
| Molecular Weight |
~22 kDa |
The VTI1A gene consists of 8 exons spanning approximately 10 kb of genomic DNA. The gene encodes a protein with 193 amino acids containing an N-terminal Habc domain and a C-terminal transmembrane region typical of Qc-SNAREs.
- Isoform 1 (canonical): 193 amino acids
- Isoform 2: Alternative splicing variant
VTI1A functions as a Qc-SNARE (glutamine-containing SNARE) in intracellular trafficking:
VTI1A forms SNARE complexes with:
- Syntaxin: Qa-SNARE partner
- SNAP-25/23: Qb-SNARE partner
The resulting four-helix bundle drives membrane fusion.
- Vesicle Trafficking: Mediates vesicular transport between intracellular compartments
- Autophagy: Involved in autophagosome formation and maturation
- Lysosomal Function: Regulates trafficking to lysosomes
- Synaptic Vesicle Cycling: Participates in neurotransmitter release
- Endosomal Trafficking: Controls endocytic pathway
- Brain: High expression in cortex, hippocampus, cerebellum
- Neurons: Dendritic and axonal compartments
- Glia: Astrocytic and microglial expression
- Systemic: Ubiquitous expression
VTI1A contributes to AD through:
- Autophagy Dysfunction: Impaired autophagosome-lysosome fusion
- Aβ Trafficking: Altered APP processing and Aβ secretion
- Tau Pathology: Interaction with tau-mediated transport defects
- Synaptic Dysfunction: Impaired neurotransmitter release
Key Evidence:
- VTI1A in brain tissue affected by AD pathology
- SNARE complex alterations in AD brain
- Autophagy deficits involving VTI1A
- Lysosomal Dysfunction: Impaired protein clearance
- α-Synuclein Trafficking: Role in α-synuclein secretion and spread
- Autophagy Impairment: Reduced autophagic flux
- Dopaminergic Vulnerability: Specific effects on dopaminergic neurons
- Protein Aggregation: Impaired protein quality control
- Vesicle Transport Defects: Axonal transport abnormalities
- Autophagy Dysfunction: Aggregate clearance issues
| Approach |
Mechanism |
Status |
| SNARE Modulation |
Enhance assembly/disassembly |
Research |
| Autophagy Enhancement |
Upstream of VTI1A |
Preclinical |
| Gene Therapy |
Increase expression |
Experimental |
- Complex SNARE biology
- Multiple binding partners
- Timing of intervention
- Understanding VTI1A in specific neuron types
- SNARE complex composition in disease
- Therapeutic modulation of SNARE function
- Biomarker development
The study of Vti1A 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.
- Xu J, et al. (2018). SNARE proteins in neurodegenerative disease. Journal of Molecular Neuroscience. PMID:29368156.
- Lee JH, et al. (2019). Autophagy and neurodegenerative disease. Nature Reviews Neurology. PMID:31235863.
- Nixon RA, et al. (2020). The role of autophagy in AD. Neuron. PMID:32877961.
- Büttner S, et al. (2017). SNARE dynamics in synaptic plasticity. Trends in Neurosciences. PMID:28528771.
- Wong YC, et al. (2018). Lysosomal dysfunction in PD. Molecular Neurobiology. PMID:29488146.