V-type proton ATPase subunit a, Golgi isoform (STV1) is a 890-residue protein from Saccharomyces cerevisiae (strain ATCC 204508 / S288c). This is its AlphaFold structure prediction, created 1 Aug 2025. UniProt accession: P37296.
Explore in 3D Color by confidence AlphaFold DB UniProt
The mean pLDDT of this model is 79.1 (confident overall). pLDDT is AlphaFold's per-residue confidence score from 0 to 100. In MolViewer, choose the B-factor color scheme to color the model by pLDDT, because AlphaFold stores it in the B-factor column.
| pLDDT band | Meaning | Share of residues |
|---|---|---|
| Above 90 | Very high: backbone and side chains are usually accurate | 32% |
| 70 to 90 | Confident: backbone generally right | 47% |
| 50 to 70 | Low: treat with caution | 8% |
| Below 50 | Very low: often disordered regions | 14% |
What pLDDT means and how to read it
Subunit of the V0 complex of vacuolar(H+)-ATPase (V-ATPase), a multisubunit enzyme composed of a peripheral complex (V1) that hydrolyzes ATP and a membrane integral complex (V0) that translocates protons (PubMed:11278748, PubMed:7514599). V-ATPase is responsible for acidifying and maintaining the pH of intracellular compartments (PubMed:11278748, PubMed:7514599). Is present only in Golgi- and endosome-residing V-ATPase complexes; enzymes containing this subunit have a 4-fold lower ratio of proton transport to ATP hydrolysis than complexes containing the vacuolar isoform and do not dissociate V1 and V0 in response to glucose depletion (PubMed:11278748, PubMed:7514599)
V-ATPase is a heteromultimeric enzyme composed of a peripheral catalytic V1 complex (components A to H) attached to an integral membrane V0 proton pore complex (components: a, c, c', c'', d, e, f and VOA1)
Endosome membrane, Golgi apparatus membrane
Compare the prediction with experimentally determined structures of the same protein:
| PDB ID | Method | Resolution | Chains and residues |
|---|---|---|---|
| 6O7U | EM | 3.1 Å | a=1-890 |
| 6O7V | EM | 6.6 Å | a=1-890 |
| 6O7W | EM | 7.0 Å | a=1-890 |
| 6O7X | EM | 8.7 Å | a=1-890 |
MolViewer loads the AlphaFold model straight from AlphaFold DB into your browser. Show it as a cartoon, color by pLDDT, measure distances and angles, and load a PDB structure next to it to compare.