Prostate-specific antigen (KLK3) is a 261-residue protein from Homo sapiens. This is its AlphaFold structure prediction, created 1 Aug 2025. UniProt accession: P07288.
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The mean pLDDT of this model is 91.9 (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 | 84% |
| 70 to 90 | Confident: backbone generally right | 7% |
| 50 to 70 | Low: treat with caution | 3% |
| Below 50 | Very low: often disordered regions | 7% |
What pLDDT means and how to read it
Hydrolyzes semenogelin-1 thus leading to the liquefaction of the seminal coagulum
Forms a heterodimer with SERPINA5
Secreted
Compare the prediction with experimentally determined structures of the same protein:
| PDB ID | Method | Resolution | Chains and residues |
|---|---|---|---|
| 9F1I | X-ray | 1.38 Å | P/Q=67-76 |
| 9ZJQ | X-ray | 2.2 Å | A=25-261 |
| 2ZCH | X-ray | 2.83 Å | P=25-261 |
| 2ZCK | X-ray | 3.1 Å | P=25-261 |
| 3QUM | X-ray | 3.2 Å | P/Q=25-261 |
| 2ZCL | X-ray | 3.25 Å | P=25-261 |
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