Phosphocarrier protein HPr (ptsH) is a 85-residue protein from Escherichia coli (strain K12). This is its AlphaFold structure prediction, created 1 Aug 2025. UniProt accession: P0AA04.
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The mean pLDDT of this model is 96.6 (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 | 97% |
| 70 to 90 | Confident: backbone generally right | 4% |
| 50 to 70 | Low: treat with caution | 0% |
| Below 50 | Very low: often disordered regions | 0% |
What pLDDT means and how to read it
General (non sugar-specific) component of the phosphoenolpyruvate-dependent sugar phosphotransferase system (sugar PTS). This major carbohydrate active-transport system catalyzes the phosphorylation of incoming sugar substrates concomitantly with their translocation across the cell membrane. The phosphoryl group from phosphoenolpyruvate (PEP) is transferred to the phosphoryl carrier protein HPr by enzyme I. Phospho-HPr then transfers it to the PTS EIIA domain
Cytoplasm
Compare the prediction with experimentally determined structures of the same protein:
| PDB ID | Method | Resolution | Chains and residues |
|---|---|---|---|
| 3CCD | X-ray | 1.0 Å | A/B=1-85 |
| 1OPD | X-ray | 1.5 Å | A=1-85 |
| 1CM3 | X-ray | 1.6 Å | A=1-85 |
| 1CM2 | X-ray | 1.8 Å | A=1-85 |
| 1POH | X-ray | 2.0 Å | A=1-85 |
| 4XWJ | X-ray | 2.1 Å | B=1-85 |
| 2JEL | X-ray | 2.5 Å | P=1-85 |
| 5YA1 | X-ray | 2.7 Å | C/D=1-85 |
| 5YA2 | X-ray | 2.7 Å | C/D=1-85 |
| 5YA0 | X-ray | 3.0 Å | C/D=1-85 |
| 6KCR | X-ray | 3.5 Å | B/D=1-85 |
| 1GGR | NMR | B=1-85 | |
| 1HDN | NMR | A=1-85 | |
| 1J6T | NMR | B=1-85 | |
| 1PFH | NMR | A=1-85 | |
| 1VRC | NMR | C/D=1-85 | |
| 2LRK | NMR | D=1-85 | |
| 2LRL | NMR | D=1-85 | |
| 2XDF | NMR | C/D=1-85 | |
| 3EZA | NMR | B=1-85 |
Showing 20 of 22 experimental structures (best resolution first).
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