Voltage-gated potassium channel (APE_0955) is a 295-residue protein from Aeropyrum pernix (strain ATCC 700893 / DSM 11879 / JCM 9820 / NBRC 100138 / K1). This is its AlphaFold structure prediction, created 1 Aug 2025. UniProt accession: Q9YDF8.
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The mean pLDDT of this model is 82.0 (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 | 29% |
| 70 to 90 | Confident: backbone generally right | 55% |
| 50 to 70 | Low: treat with caution | 12% |
| Below 50 | Very low: often disordered regions | 4% |
What pLDDT means and how to read it
Mediates a strong voltage-dependent potassium ion permeability of excitable membranes. Assuming opened or closed conformations in response to the voltage difference across the membrane, the protein forms a potassium-selective channel through which potassium ions may pass in accordance with their electrochemical gradient
Cell membrane
Compare the prediction with experimentally determined structures of the same protein:
| PDB ID | Method | Resolution | Chains and residues |
|---|---|---|---|
| 1ORS | X-ray | 1.9 Å | C=33-161 |
| 1ORQ | X-ray | 3.2 Å | C=31-253 |
| 2A0L | X-ray | 3.9 Å | A/B=20-259 |
| 6UWM | EM | 5.9 Å | A/B/C/D=25-295 |
| 2KYH | NMR | A=19-160 |
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