Calcium-gated potassium channel MthK (mthK) is a 336-residue protein from Methanothermobacter thermautotrophicus (strain ATCC 29096 / DSM 1053 / JCM 10044 / NBRC 100330 / Delta H). This is its AlphaFold structure prediction, created 1 Aug 2025. UniProt accession: O27564.
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The mean pLDDT of this model is 90.6 (very high 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 | 77% |
| 70 to 90 | Confident: backbone generally right | 17% |
| 50 to 70 | Low: treat with caution | 6% |
| Below 50 | Very low: often disordered regions | 0% |
What pLDDT means and how to read it
Calcium-gated potassium channel
Homotetramer
Cell membrane
Compare the prediction with experimentally determined structures of the same protein:
| PDB ID | Method | Resolution | Chains and residues |
|---|---|---|---|
| 3LDC | X-ray | 1.45 Å | A=18-99 |
| 3LDD | X-ray | 1.45 Å | A=18-99 |
| 6U9T | X-ray | 1.55 Å | A=18-99 |
| 4HYO | X-ray | 1.65 Å | A/B/C/D/E/F/G/H=11-101 |
| 6U9P | X-ray | 1.65 Å | A=18-99 |
| 2AEF | X-ray | 1.7 Å | A/B=107-336 |
| 4HZ3 | X-ray | 1.7 Å | A/B/C/D/E/F/G/H=11-101 |
| 3OUS | X-ray | 1.75 Å | A=18-99 |
| 3R65 | X-ray | 1.8 Å | A=18-99 |
| 6U9Y | X-ray | 1.8 Å | A=18-99 |
| 4L74 | X-ray | 1.84 Å | A/B=107-336 |
| 6U9Z | X-ray | 1.95 Å | A=18-99 |
| 2AEJ | X-ray | 2.1 Å | A/B=107-336 |
| 4QE9 | X-ray | 2.15 Å | A=18-100 |
| 3KXD | X-ray | 2.2 Å | A/B=116-336 |
| 3LDE | X-ray | 2.21 Å | A=18-99 |
| 4L75 | X-ray | 2.39 Å | A/B/C/D/E/F=107-336 |
| 4QE7 | X-ray | 2.4 Å | A=19-99 |
| 4L73 | X-ray | 2.5 Å | A/B=107-336 |
| 2FY8 | X-ray | 2.79 Å | A/B/C/D/E/F/G/H=107-336 |
Showing 20 of 48 experimental structures (best resolution first).
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