ATP6V0A1 is a gene involved in cellular processes relevant to neurodegeneration.
Full Name: ATPase H+ Transporting V0 Subunit A1 [1]
Chromosome: 17q21.31 [2]
NCBI Gene ID: 271 [3]
OMIM ID: 192132 [4]
Ensembl ID: ENSG00000115884 [5]
UniProt ID: Q9Y282 [6]
ATP6V0A1 encodes the a1 subunit of the vacuolar H+-ATPase (V-ATPase), a fundamental proton pump that acidifies intracellular compartments throughout the cell. This gene has been implicated in Parkinson disease (PD) through genome-wide association studies (GWAS), highlighting its potential role in lysosomal function and protein clearance pathways critical to neurodegeneration [1][2]. [7]
The V-ATPase is a large multi-subunit enzyme composed of two main domains: the V0 membrane-embedded sector responsible for proton translocation, and the V1 cytoplasmic domain that hydrolyzes ATP. ATP6V0A1 encodes the largest subunit of the V0 sector (a-subunit isoform a1), which forms the proton channel across the lysosomal membrane [3].
The proton gradient generated by V-ATPase is essential for:
In neurons, V-ATPase activity is particularly critical for:
ATP6V0A1 variants have been associated with PD risk in multiple GWAS studies [1][2]. The gene is located in a region linked to familial PD, and its involvement in lysosomal function makes it a plausible candidate. Key connections include:
ATP6V0A1 is ubiquitously expressed with high levels in:
In the brain, expression is particularly high in neurons and glial cells, with elevated expression in dopaminergic neurons of the substantia nigra—the population vulnerable in PD.
ATP6V0A1 represents a potential therapeutic target for neurodegenerative diseases:
ATP6V0A1 interacts with multiple cellular pathways relevant to neurodegeneration:
| Pathway | Role |
|---|---|
| Autophagy-Lysosome Pathway | Proton gradient for lysosomal degradation |
| Synaptic Vesicle Cycle | Synaptic vesicle acidification |
| Mitochondrial Dynamics | Mitophagy regulation |
| ER Stress Response | UPR signaling |
| Neuroinflammation | Microglial lysosomal function |
Knockout of ATP6V0A1 in mice results in:
Drosophila models have shown that V-ATPase deficiency in neurons leads to:
While direct clinical testing for ATP6V0A1 variants is not routine, the gene represents:
Nalls MA et al. Parkinson's disease genetics (2014). 2014. ↩︎
Forgac M, Vacuolar ATPases: rotary proton pumps (2007). 2007. ↩︎
Zhang L et al. V-ATPase in neurodegeneration (2019). 2019. ↩︎
Dehay B et al. Lysosomal dysfunction in PD (2012). 2012. ↩︎
Bourdenx M et al. Autophagy and alpha-synuclein (2021). 2021. ↩︎
Wallace DC et al. Mitochondria and neurodegeneration (2012). 2012. ↩︎
Xia Q et al. V-ATPase in Alzheimer's disease (2020). 2020. ↩︎