Biopolymer transport protein ExbB (exbB) is a 244-residue protein from Escherichia coli (strain K12). This is its AlphaFold structure prediction, created 1 Aug 2025. UniProt accession: P0ABU7.
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The mean pLDDT of this model is 90.5 (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 | 12% |
| 50 to 70 | Low: treat with caution | 7% |
| Below 50 | Very low: often disordered regions | 4% |
What pLDDT means and how to read it
Involved in the TonB-dependent energy-dependent transport of various receptor-bound substrates. Protects ExbD from proteolytic degradation and functionally stabilizes TonB
The accessory proteins ExbB and ExbD seem to form a complex with TonB
Cell inner membrane
Compare the prediction with experimentally determined structures of the same protein:
| PDB ID | Method | Resolution | Chains and residues |
|---|---|---|---|
| 5SV0 | X-ray | 2.6 Å | A/B/C/D/E/F/G/H/I/J=1-244 |
| 9DDO | EM | 2.8 Å | A/B/C/D/E=1-244 |
| 5ZFP | X-ray | 2.84 Å | A/B/C/D/E/F/G/H/I/J/K/L=1-244 |
| 9DDP | EM | 3.16 Å | A/B/C/D/E=1-244 |
| 9DDQ | EM | 3.19 Å | A/B/C/D/E=1-244 |
| 6TYI | EM | 3.3 Å | A/B/C/D/E=1-244 |
| 5SV1 | X-ray | 3.5 Å | A/B/C/D/E/F/G/H/I/J=1-244 |
| 5ZFU | EM | 6.7 Å | A/B/C/D/E/F=1-244 |
| 5ZFV | EM | 7.1 Å | A/B/C/D/E=1-244 |
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