Major outer membrane protein P.IA (porA) is a 393-residue protein from Neisseria meningitidis serogroup C. This is its AlphaFold structure prediction, created 1 Aug 2025. UniProt accession: P13415.
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The mean pLDDT of this model is 84.2 (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 | 58% |
| 70 to 90 | Confident: backbone generally right | 25% |
| 50 to 70 | Low: treat with caution | 6% |
| Below 50 | Very low: often disordered regions | 11% |
What pLDDT means and how to read it
Serves as a slightly cation selective porin. Major antigen on the gonococcal cell surface and it may have pathogenic properties in addition to its porin activity
Homotrimer
Cell outer membrane
Compare the prediction with experimentally determined structures of the same protein:
| PDB ID | Method | Resolution | Chains and residues |
|---|---|---|---|
| 5NQZ | X-ray | 1.63 Å | A/B=195-206 |
| 5NQY | X-ray | 2.6 Å | A=195-208 |
| 5NQP | X-ray | 2.86 Å | A/B/C=195-208 |
| 5NQX | X-ray | 3.66 Å | A/B/C/D/E=195-207 |
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