Kappa light chain (Igkc) is a 219-residue protein from Mus musculus. This is its AlphaFold structure prediction, created 1 Jun 2022. UniProt accession: A2P1G9.
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The mean pLDDT of this model is 95.4 (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 | 93% |
| 70 to 90 | Confident: backbone generally right | 7% |
| 50 to 70 | Low: treat with caution | 1% |
| Below 50 | Very low: often disordered regions | 0% |
What pLDDT means and how to read it
Compare the prediction with experimentally determined structures of the same protein:
| PDB ID | Method | Resolution | Chains and residues |
|---|---|---|---|
| 1YNL | X-ray | 1.7 Å | L=1-219 |
| 1YNK | X-ray | 2.1 Å | L=1-219 |
| 2CGR | X-ray | 2.2 Å | L=1-219 |
| 1CGS | X-ray | 2.6 Å | L=1-219 |
| 4ZXB | X-ray | 3.3 Å | D=1-219 |
MolViewer loads the AlphaFold model straight from AlphaFold DB into your browser. Show it as a cartoon, color by pLDDT, measure distances and angles, and load a PDB structure next to it to compare.