Immunity protein CdiI (cdiI) is a 106-residue protein from Escherichia coli (strain NC101). This is its AlphaFold structure prediction, created 1 Aug 2025. UniProt accession: P0DSM8.
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The mean pLDDT of this model is 95.9 (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 | 96% |
| 70 to 90 | Confident: backbone generally right | 3% |
| 50 to 70 | Low: treat with caution | 1% |
| Below 50 | Very low: often disordered regions | 0% |
What pLDDT means and how to read it
Immunity protein component of a toxin-immunity protein module, which functions as a cellular contact-dependent growth inhibition (CDI) system. CDI modules allow bacteria to communicate with and inhibit the growth of closely related neighboring bacteria in a contact-dependent fashion. Neutralizes the toxic activity of cognate toxin CdiA-NC101 (the C-terminal 154 residue CT fragment) (PubMed:26305955). Does not inhibit toxic activity of CdiA from other toxin-immunity modules or strains of E.coli (Probable). Mediates dimerization of the ternary CdiA-CT-NC101, CdiI-NC101 and EF-Tu complex; both CdiI molecules contact both EF-Tu molecules (PubMed:28973472)
Forms a contact-dependent growth inhibition complex of CdiA-CT-NC101, CdiI-NC101 and EF-Tu; the complex is a dimer of heterotrimers
Compare the prediction with experimentally determined structures of the same protein:
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