Sperm acrosome associated 9 (SPACA9) is a 169-residue protein from Bos taurus. This is its AlphaFold structure prediction, created 31 Mar 2025. UniProt accession: A0A3Q1MYU9.
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The mean pLDDT of this model is 86.8 (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 | 63% |
| 70 to 90 | Confident: backbone generally right | 23% |
| 50 to 70 | Low: treat with caution | 10% |
| Below 50 | Very low: often disordered regions | 5% |
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 |
|---|---|---|---|
| 8OU0 | EM | 3.5 Å | C=1-166 |
| 9CPB | EM | 3.52 Å | 5D/5E/5F/5G/5H/5I/5J=1-169 |
| 8OTZ | EM | 3.6 Å | 0A/0C/0E/0G/0W/0Y/0a/0c/0e/0g/0i/0k/CT/CU/CV/CX/CY/CZ/Ca/Cb/Cc/Cd/Ce/Cf/Cg/Ch/Ci/Cj/Ck=1-166 |
| 9FQR | EM | 5.0 Å | 0A/0B/0C/0D/0E/0F/0G/0H/0Y/0Z/0a/0c/0d/0e/0f/0g/0h/0i/0j/0k/CT/CU/CV/CX/CY/CZ/Ca/Cb/Cc/Cd=1-166 |
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