Signal recognition particle receptor FtsY (ftsY) is a 304-residue protein from Thermus aquaticus. This is its AlphaFold structure prediction, created 1 Aug 2025. UniProt accession: P83749.
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The mean pLDDT of this model is 89.3 (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 | 69% |
| 70 to 90 | Confident: backbone generally right | 21% |
| 50 to 70 | Low: treat with caution | 10% |
| Below 50 | Very low: often disordered regions | 0% |
What pLDDT means and how to read it
Involved in targeting and insertion of nascent membrane proteins into the cytoplasmic membrane. Acts as a receptor for the complex formed by the signal recognition particle (SRP) and the ribosome-nascent chain (RNC)
Part of the signal recognition particle protein translocation system, which is composed of SRP and FtsY
Cell membrane, Cytoplasm
Compare the prediction with experimentally determined structures of the same protein:
| PDB ID | Method | Resolution | Chains and residues |
|---|---|---|---|
| 1RJ9 | X-ray | 1.9 Å | A=1-304 |
| 2J7P | X-ray | 1.97 Å | D/E=22-304 |
| 1OKK | X-ray | 2.05 Å | D=2-304 |
| 2IYL | X-ray | 2.1 Å | D=21-304 |
| 2Q9C | X-ray | 2.2 Å | A/B=1-304 |
| 2Q9A | X-ray | 2.24 Å | A/B=1-304 |
| 2Q9B | X-ray | 2.3 Å | A/B=1-304 |
| 2CNW | X-ray | 2.39 Å | D/E/F=21-304 |
| 2XKV | EM | 13.5 Å | D=2-304 |
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