Barstar is a 90-residue protein from Bacillus amyloliquefaciens. This is its AlphaFold structure prediction, created 1 Aug 2025. UniProt accession: P11540.
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The mean pLDDT of this model is 97.3 (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 | 99% |
| 70 to 90 | Confident: backbone generally right | 1% |
| 50 to 70 | Low: treat with caution | 0% |
| Below 50 | Very low: often disordered regions | 0% |
What pLDDT means and how to read it
Inhibitor of the ribonuclease barnase. Forms a one-to-one non-covalent complex
Cytoplasm
Compare the prediction with experimentally determined structures of the same protein:
| PDB ID | Method | Resolution | Chains and residues |
|---|---|---|---|
| 6PQK | X-ray | 1.2 Å | B/D=1-90 |
| 2ZA4 | X-ray | 1.58 Å | B/D=1-90 |
| 1AY7 | X-ray | 1.7 Å | B=2-90 |
| 1B2S | X-ray | 1.82 Å | D/E/F=1-90 |
| 1X1Y | X-ray | 1.9 Å | D/E/F=1-90 |
| 1BRS | X-ray | 2.0 Å | D/E/F=2-90 |
| 2HXX | X-ray | 2.0 Å | A/B=2-90 |
| 1B27 | X-ray | 2.1 Å | D/E/F=1-90 |
| 1B2U | X-ray | 2.1 Å | D/E/F=1-90 |
| 1X1W | X-ray | 2.1 Å | D/E/F=1-90 |
| 3DA7 | X-ray | 2.25 Å | C/D/F/H=1-90 |
| 7MRX | X-ray | 2.29 Å | B/D/F=1-90 |
| 1X1U | X-ray | 2.3 Å | D/E/F=2-90 |
| 1X1X | X-ray | 2.3 Å | D/E/F=2-90 |
| 1B3S | X-ray | 2.39 Å | D/E/F=1-90 |
| 1BGS | X-ray | 2.6 Å | E/F/G=2-90 |
| 1A19 | X-ray | 2.76 Å | A/B=1-90 |
| 1AB7 | NMR | A=2-90 | |
| 1BTA | NMR | A=2-90 | |
| 1BTB | NMR | A=2-90 |
Showing 20 of 21 experimental structures (best resolution first).
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