Colicin-E9 immunity protein (imm) is a 86-residue protein from Escherichia coli. This is its AlphaFold structure prediction, created 1 Aug 2025. UniProt accession: P13479.
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The mean pLDDT of this model is 96.8 (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 | 98% |
| 70 to 90 | Confident: backbone generally right | 1% |
| 50 to 70 | Low: treat with caution | 1% |
| Below 50 | Very low: often disordered regions | 0% |
What pLDDT means and how to read it
This protein is able to protect a cell, which harbors the plasmid ColE9 encoding colicin E9, against colicin E9, it binds specifically to the DNase-type colicin and inhibits its bactericidal activity
Compare the prediction with experimentally determined structures of the same protein:
| PDB ID | Method | Resolution | Chains and residues |
|---|---|---|---|
| 1FR2 | X-ray | 1.6 Å | A=1-86 |
| 2GYK | X-ray | 1.6 Å | A/E=1-86 |
| 2GZJ | X-ray | 1.6 Å | A/E=1-86 |
| 2VLN | X-ray | 1.6 Å | A=1-86 |
| 2VLQ | X-ray | 1.6 Å | A=1-86 |
| 1EMV | X-ray | 1.7 Å | A=1-86 |
| 2GZG | X-ray | 1.7 Å | A=1-86 |
| 2GZI | X-ray | 1.7 Å | A=1-86 |
| 2GZF | X-ray | 1.75 Å | A=1-86 |
| 2GZE | X-ray | 1.8 Å | A=1-86 |
| 2VLO | X-ray | 1.8 Å | A=1-86 |
| 2VLP | X-ray | 2.0 Å | A=1-86 |
| 1BXI | X-ray | 2.05 Å | A=1-86 |
| 3GKL | X-ray | 2.2 Å | C/D=1-86 |
| 3GJN | X-ray | 2.48 Å | A/D=1-86 |
| 5EW5 | X-ray | 3.2 Å | E/F/G/H=1-86 |
| 1E0H | NMR | A=1-86 | |
| 1IMP | NMR | A=1-86 | |
| 1IMQ | NMR | A=1-86 | |
| 2K5X | NMR | A=1-86 |
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