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: P32890.
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The mean pLDDT of this model is 88.1 (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 | 70% |
| 70 to 90 | Confident: backbone generally right | 14% |
| 50 to 70 | Low: treat with caution | 12% |
| Below 50 | Very low: often disordered regions | 4% |
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 |
|---|---|---|---|
| 1DJR | X-ray | 1.3 Å | D/E/F/G/H=22-124 |
| 6IAL | X-ray | 1.45 Å | A/B/C/D/E/F/G/H/I/J=22-124 |
| 1EFI | X-ray | 1.6 Å | D/E/F/G/H=22-124 |
| 5LZI | X-ray | 1.6 Å | A/B/C/D/E=22-124 |
| 1LT5 | X-ray | 1.7 Å | D/E/F/G/H=22-124 |
| 1EEF | X-ray | 1.8 Å | D/E/F/G/H/L/M/N/O/P=22-124 |
| 1FD7 | X-ray | 1.8 Å | D/E/F/G/H/L/M/N/O/P=22-124 |
| 2XRS | X-ray | 1.81 Å | D/E/F/G/H/L/M/N/O/P=22-124 |
| 1LTS | X-ray | 1.95 Å | D/E/F/G/H=22-124 |
| 1PZI | X-ray | 1.99 Å | D/E/F/G/H=22-124 |
| 1LT3 | X-ray | 2.0 Å | D/E/F/G/H=22-124 |
| 1LT4 | X-ray | 2.0 Å | D/E/F/G/H=22-124 |
| 1LTI | X-ray | 2.13 Å | D/E/F/G/H=22-124 |
| 1JQY | X-ray | 2.14 Å | D/E/F/G/H/L/M/N/O/P/V/W/X/Y/Z=22-124 |
| 1LT6 | X-ray | 2.2 Å | D/E/F/G/H/L/M/N/O/P=22-124 |
| 1LTA | X-ray | 2.2 Å | D/E/F/G/H=22-124 |
| 1LTT | X-ray | 2.3 Å | D/E/F/G/H=22-124 |
| 1TET | X-ray | 2.3 Å | P=71-85 |
| 1LTG | X-ray | 2.4 Å | D/E/F/G/H=22-124 |
| 2XRQ | X-ray | 2.4 Å | D/E/F/G/H=22-124 |
Showing 20 of 22 experimental structures (best resolution first).
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