Heat-labile enterotoxin B chain (eltB) is a 124-residue protein from Escherichia coli. This is its AlphaFold structure prediction, created 1 Aug 2025. UniProt accession: P0CK94.
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The mean pLDDT of this model is 86.3 (confident 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 | 66% |
| 70 to 90 | Confident: backbone generally right | 18% |
| 50 to 70 | Low: treat with caution | 2% |
| Below 50 | Very low: often disordered regions | 14% |
What pLDDT means and how to read it
The biological activity of the toxin is produced by the A chain, which activates intracellular adenyl cyclase
Heterohexamer of one A chain and of five B chains
Compare the prediction with experimentally determined structures of the same protein:
| PDB ID | Method | Resolution | Chains and residues |
|---|---|---|---|
| 3EFX | X-ray | 1.94 Å | D/E/F/G/H/I/J/K/L/M=28-51, D/E/F/G/H/I/J/K/L/M=68-95, D/E/F/G/H/I/J/K/L/M=115-122 |
| 2O2L | X-ray | 2.53 Å | D/E/F/G/H/I/J/K/L/M=22-123 |
| 1LTR | X-ray | 3.04 Å | D/E/F/G/H=22-123 |
| 1B44 | X-ray | 3.3 Å | D/E/F/G/H=22-124 |
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