Serine--tRNA ligase (serS) is a 421-residue protein from Thermus thermophilus (strain ATCC BAA-163 / DSM 7039 / HB27). This is its AlphaFold structure prediction, created 1 Aug 2025. UniProt accession: P34945.
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The mean pLDDT of this model is 96.8 (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 | 96% |
| 70 to 90 | Confident: backbone generally right | 3% |
| 50 to 70 | Low: treat with caution | 0% |
| Below 50 | Very low: often disordered regions | 0% |
What pLDDT means and how to read it
Catalyzes the attachment of serine to tRNA(Ser). Is also probably able to aminoacylate tRNA(Sec) with serine, to form the misacylated tRNA L-seryl-tRNA(Sec), which will be further converted into selenocysteinyl-tRNA(Sec)
Homodimer. A single tRNA molecule binds across the dimer
Cytoplasm
Compare the prediction with experimentally determined structures of the same protein:
| PDB ID | Method | Resolution | Chains and residues |
|---|---|---|---|
| 5EIU | X-ray | 1.91 Å | A/D=49-78 |
| 3ERR | X-ray | 2.27 Å | A/B=94-419 |
| 5F7T | X-ray | 2.29 Å | E/F/H/L=49-78 |
| 5VA4 | X-ray | 2.31 Å | A=49-78 |
| 1SES | X-ray | 2.5 Å | A/B=1-421 |
| 1SRY | X-ray | 2.5 Å | A/B=1-421 |
| 1SET | X-ray | 2.55 Å | A/B=1-421 |
| 9QRP | X-ray | 2.7 Å | A/B=1-421 |
| 1SER | X-ray | 2.9 Å | A/B=1-421 |
| 5IEA | X-ray | 3.26 Å | A/B/C/D/F/K=49-78 |
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