Uracil-DNA glycosylase inhibitor (UGI) is a 84-residue protein from Bacillus phage PBS2 (Bacteriophage PBS2). This is its AlphaFold structure prediction, created 17 Mar 2025. UniProt accession: P14739.
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The mean pLDDT of this model is 90.7 (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 | 73% |
| 70 to 90 | Confident: backbone generally right | 24% |
| 50 to 70 | Low: treat with caution | 2% |
| Below 50 | Very low: often disordered regions | 0% |
What pLDDT means and how to read it
This protein binds specifically and reversibly to the host uracil-DNA glycosylase, preventing removal of uracil residues from PBS2 DNA by the host uracil-excision repair system
Compare the prediction with experimentally determined structures of the same protein:
| PDB ID | Method | Resolution | Chains and residues |
|---|---|---|---|
| 1UGI | X-ray | 1.55 Å | A/B/C/D/E/F/G/H=1-84 |
| 1UGH | X-ray | 1.9 Å | I=3-84 |
| 4LYL | X-ray | 1.93 Å | B/D/F/H/J/L/N/P=1-84 |
| 2UGI | X-ray | 2.2 Å | A/B=1-84 |
| 2J8X | X-ray | 2.3 Å | B/D=1-84 |
| 1UUG | X-ray | 2.4 Å | B/D=1-84 |
| 2UUG | X-ray | 2.6 Å | C/D=1-84 |
| 6LYD | X-ray | 2.6 Å | I=2-84 |
| 1UDI | X-ray | 2.7 Å | I=2-84 |
| 1LQG | X-ray | 2.9 Å | C/D=1-84 |
| 2ZHX | X-ray | 3.1 Å | B/D/F/H/J/L/N=1-84 |
| 6LYE | X-ray | 3.1 Å | I=2-84 |
| 1EUI | X-ray | 3.2 Å | C/D=1-84 |
| 1LQM | X-ray | 3.2 Å | B/D/F/H=1-84 |
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