E3 ubiquitin-protein ligase IpaH1.4 (ipaH1.4) is a 575-residue protein from Shigella flexneri. This is its AlphaFold structure prediction, created 1 Aug 2025. UniProt accession: A0A0H2USG1.
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The mean pLDDT of this model is 83.5 (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 | 51% |
| 70 to 90 | Confident: backbone generally right | 33% |
| 50 to 70 | Low: treat with caution | 7% |
| Below 50 | Very low: often disordered regions | 9% |
What pLDDT means and how to read it
E3 ubiquitin-protein ligase effector that inhibits host cell innate immunity during bacterial infection by catalyzing 'Lys-48'-linked polyubiquitination and subsequent degradation of host RNF31/HOIP, RBCK1/HOIL-1 and RNF213 (PubMed:18997778, PubMed:27572974, PubMed:35294289, PubMed:36610722, PubMed:40164614, PubMed:40205224). Host RNF31/HOIP is the catalytic component of the LUBAC complex, which conjugates linear ('Met-1'-linked) polyubiquitin chains at the surface of bacteria invading the host cytosol to form the ubiquitin coat surrounding bacteria (PubMed:27572974, PubMed:35294289). The bacterial ubiquitin coat acts as an 'eat-me' signal for xenophagy and promotes NF-kappa-B activation…
Interacts with human RBCK1/HOIL-1 and RNF31/HOIP components of the LUBAC complex
Secreted, Host cytoplasm
Compare the prediction with experimentally determined structures of the same protein:
| PDB ID | Method | Resolution | Chains and residues |
|---|---|---|---|
| 7YA7 | X-ray | 1.4 Å | A/B=36-274 |
| 7V8E | X-ray | 1.9 Å | A/B=39-273 |
| 7V8H | X-ray | 2.46 Å | A/B=38-273 |
| 3CKD | X-ray | 2.65 Å | A/B/C=265-575 |
| 7V8G | X-ray | 2.75 Å | A/B=38-273 |
| 9G08 | EM | 3.3 Å | B=1-575 |
| 9JWG | EM | 3.47 Å | B=1-575 |
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