Small ribosomal subunit protein mS39 (PTCD3) is a 689-residue protein from Homo sapiens. This is its AlphaFold structure prediction, created 1 Aug 2025. UniProt accession: Q96EY7.
Explore in 3D Color by confidence AlphaFold DB UniProt
The mean pLDDT of this model is 79.0 (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 | 43% |
| 70 to 90 | Confident: backbone generally right | 37% |
| 50 to 70 | Low: treat with caution | 5% |
| Below 50 | Very low: often disordered regions | 15% |
What pLDDT means and how to read it
Mitochondrial RNA-binding protein that has a role in mitochondrial translation
Component of the mitochondrial small ribosomal subunit (mt-SSU). Mature mammalian 55S mitochondrial ribosomes consist of a small (28S) and a large (39S) subunit. The 28S small subunit contains a 12S ribosomal RNA (12S mt-rRNA) and 30 different proteins. The 39S large subunit contains a 16S rRNA (16S mt-rRNA), a copy of mitochondrial valine transfer RNA (mt-tRNA(Val)), which plays an integral…
Mitochondrion
Compare the prediction with experimentally determined structures of the same protein:
| PDB ID | Method | Resolution | Chains and residues |
|---|---|---|---|
| 7QI4 | EM | 2.21 Å | A4=1-689 |
| 8CSS | EM | 2.36 Å | 4=1-689 |
| 7P2E | EM | 2.4 Å | 4=1-689 |
| 8RRI | EM | 2.4 Å | A4=1-689 |
| 9OJM | EM | 2.5 Å | 4=55-670 |
| 8CSQ | EM | 2.54 Å | 4=1-689 |
| 8CSR | EM | 2.54 Å | 4=1-689 |
| 6ZM6 | EM | 2.59 Å | A4=1-689 |
| 7QI5 | EM | 2.63 Å | A4=1-689 |
| 8CSP | EM | 2.66 Å | 4=1-689 |
| 7PNX | EM | 2.76 Å | 4=1-689 |
| 8ANY | EM | 2.85 Å | A4=1-689 |
| 8CST | EM | 2.85 Å | 4=1-689 |
| 6ZM5 | EM | 2.89 Å | A4=1-689 |
| 7PO0 | EM | 2.9 Å | 4=1-689 |
| 8K2A | EM | 2.9 Å | So=1-689 |
| 7PO1 | EM | 2.92 Å | 4=1-689 |
| 7PO3 | EM | 2.92 Å | 4=1-689 |
| 6VMI | EM | 2.96 Å | A4=1-689 |
| 6RW4 | EM | 2.97 Å | 4=1-689 |
Showing 20 of 62 experimental structures (best resolution first).
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.