Xylose isomerase (xylA) is a 388-residue protein from Streptomyces rubiginosus. This is its AlphaFold structure prediction, created 1 Aug 2025. UniProt accession: P24300.
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The mean pLDDT of this model is 98.6 (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 | 99% |
| 70 to 90 | Confident: backbone generally right | 1% |
| 50 to 70 | Low: treat with caution | 0% |
| Below 50 | Very low: often disordered regions | 0% |
What pLDDT means and how to read it
Involved in D-xylose catabolism
Homotetramer
Cytoplasm
Compare the prediction with experimentally determined structures of the same protein:
| PDB ID | Method | Resolution | Chains and residues |
|---|---|---|---|
| 5AVH | X-ray | 0.9 Å | A=2-387 |
| 2GLK | X-ray | 0.94 Å | A=1-388 |
| 4A8I | X-ray | 0.95 Å | A=1-388 |
| 3U3H | X-ray | 0.97 Å | A=1-388 |
| 1MNZ | X-ray | 0.99 Å | A=1-388 |
| 7DMM | X-ray | 0.99 Å | A=2-387 |
| 8WDG | X-ray | 0.99 Å | A=3-387 |
| 5AVN | X-ray | 1.03 Å | A/B=2-388 |
| 6YBO | X-ray | 1.06 Å | A=1-388 |
| 6QRR | X-ray | 1.1 Å | A=1-388 |
| 6QRS | X-ray | 1.17 Å | A=1-388 |
| 6QRT | X-ray | 1.17 Å | A=1-388 |
| 6QRU | X-ray | 1.17 Å | A=1-388 |
| 6QRV | X-ray | 1.17 Å | A=1-388 |
| 6QRW | X-ray | 1.17 Å | A=1-388 |
| 6QRX | X-ray | 1.17 Å | A=1-388 |
| 6QRY | X-ray | 1.17 Å | A=1-388 |
| 6QUF | X-ray | 1.19 Å | A=1-388 |
| 4A8N | X-ray | 1.2 Å | A=1-388 |
| 4US6 | X-ray | 1.2 Å | A/B=1-388 |
Showing 20 of 140 experimental structures (best resolution first).
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