Sodium/potassium-transporting ATPase subunit beta-3 (ATP1B3) is a 279-residue protein from Homo sapiens. This is its AlphaFold structure prediction, created 1 Aug 2025. UniProt accession: P54709.
Explore in 3D Color by confidence AlphaFold DB UniProt
The mean pLDDT of this model is 89.7 (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 | 67% |
| 70 to 90 | Confident: backbone generally right | 27% |
| 50 to 70 | Low: treat with caution | 5% |
| Below 50 | Very low: often disordered regions | 1% |
What pLDDT means and how to read it
This is the non-catalytic component of the active enzyme, which catalyzes the hydrolysis of ATP coupled with the exchange of Na(+) and K(+) ions across the plasma membrane. The exact function of the beta-3 subunit is not known
The sodium/potassium-transporting ATPase is composed of a catalytic alpha subunit, an auxiliary non-catalytic beta subunit and an additional regulatory subunit. Interacts with catalytic alpha subunit ATP12A
Apical cell membrane, Basolateral cell membrane, Melanosome
Compare the prediction with experimentally determined structures of the same protein:
| PDB ID | Method | Resolution | Chains and residues |
|---|---|---|---|
| 9KCI | EM | 2.9 Å | B=1-279 |
| 9KCK | EM | 2.9 Å | B=1-279 |
| 9KCL | EM | 2.9 Å | B=1-279 |
| 9KCM | EM | 2.9 Å | B=1-279 |
| 9KCG | EM | 3.1 Å | B=1-279 |
| 9KCJ | EM | 3.1 Å | B=1-279 |
| 9KCR | EM | 3.2 Å | B=1-279 |
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