Small ribosomal subunit protein uS2 (rpsB) is a 241-residue protein from Escherichia coli (strain K12). This is its AlphaFold structure prediction, created 1 Aug 2025. UniProt accession: P0A7V0.
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The mean pLDDT of this model is 93.9 (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 | 91% |
| 70 to 90 | Confident: backbone generally right | 3% |
| 50 to 70 | Low: treat with caution | 5% |
| Below 50 | Very low: often disordered regions | 0% |
What pLDDT means and how to read it
Required for ribosomal protein bS1 (rpsA) to bind to the 30S subunit
Part of the 30S ribosomal subunit, contacts bS1 (PubMed:12068815). Some nascent polypeptide chains are able to cross-link to this protein in situ (PubMed:9716382). In collided ribosomes contacts ribosome rescue factor SmrB (PubMed:35264790)
Compare the prediction with experimentally determined structures of the same protein:
| PDB ID | Method | Resolution | Chains and residues |
|---|---|---|---|
| 8B0X | EM | 1.55 Å | B=1-241 |
| 9Q87 | EM | 1.55 Å | B=2-235 |
| 4ODN | X-ray | 1.6 Å | B=26-41 |
| 7OXH | X-ray | 1.7 Å | B=20-34 |
| 4ODM | X-ray | 1.75 Å | E/F/G/H/I/J/K/L/M=20-34 |
| 4ODP | X-ray | 1.75 Å | B=20-34 |
| 8CGJ | EM | 1.79 Å | B=1-241 |
| 8CF1 | EM | 1.82 Å | B=1-241 |
| 7OXJ | X-ray | 1.85 Å | D=20-34 |
| 8FTO | EM | 1.85 Å | B=1-241 |
| 9GHE | EM | 1.87 Å | B=1-241 |
| 8AYE | EM | 1.96 Å | B=1-241 |
| 7K00 | EM | 1.98 Å | B=1-241 |
| 7OXG | X-ray | 2.0 Å | C/D=20-34 |
| 8QOA | EM | 2.0 Å | B=1-241 |
| 8G6W | EM | 2.02 Å | B=1-241 |
| 8BIL | EM | 2.04 Å | f=1-241 |
| 8BIM | EM | 2.04 Å | f=1-241 |
| 8CAI | EM | 2.08 Å | B=1-241 |
| 4YBB | X-ray | 2.1 Å | AB/BB=4-227 |
Showing 20 of 530 experimental structures (best resolution first).
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