Actin, cytoplasmic 1 (ACTB) is a 375-residue protein from Geospiza fortis. This is its AlphaFold structure prediction, created 1 Jun 2022. UniProt accession: A0A6I9HGD1.
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The mean pLDDT of this model is 92.4 (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 | 82% |
| 70 to 90 | Confident: backbone generally right | 15% |
| 50 to 70 | Low: treat with caution | 2% |
| Below 50 | Very low: often disordered regions | 1% |
What pLDDT means and how to read it
Cytoplasm, cytoskeleton
Compare the prediction with experimentally determined structures of the same protein:
| PDB ID | Method | Resolution | Chains and residues |
|---|---|---|---|
| 7QJ5 | EM | 8.7 Å | e=1-375 |
| 7QJ7 | EM | 8.7 Å | e=1-375 |
| 7QJ8 | EM | 8.7 Å | e=1-375 |
| 7QJA | EM | 9.2 Å | e=1-375 |
| 7QJB | EM | 9.2 Å | e=1-375 |
| 7QJC | EM | 16.1 Å | e=1-375 |
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.