Glycerol kinase (glpK) is a 502-residue protein from Escherichia coli (strain K12). This is its AlphaFold structure prediction, created 1 Aug 2025. UniProt accession: P0A6F3.
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The mean pLDDT of this model is 95.6 (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 | 90% |
| 70 to 90 | Confident: backbone generally right | 9% |
| 50 to 70 | Low: treat with caution | 1% |
| Below 50 | Very low: often disordered regions | 0% |
What pLDDT means and how to read it
Key enzyme in the regulation of glycerol uptake and metabolism. Catalyzes the phosphorylation of glycerol to yield sn-glycerol 3-phosphate. It also catalyzes the phosphorylation of dihydroxyacetone, L-glyceraldehyde and D-glyceraldehyde. It uses only ATP
Homotetramer and homodimer (in equilibrium). Heterodimer with EIIA-Glc (crr). Binds 1 zinc ion per glycerol kinase EIIA-Glc dimer. The zinc ion is important for dimerization
Compare the prediction with experimentally determined structures of the same protein:
| PDB ID | Method | Resolution | Chains and residues |
|---|---|---|---|
| 3EZW | X-ray | 2.0 Å | A/B/C/D/E/F/G/H=2-501 |
| 1BU6 | X-ray | 2.37 Å | O/X/Y/Z=2-502 |
| 1GLA | X-ray | 2.6 Å | G=2-502 |
| 1GLB | X-ray | 2.6 Å | G=2-502 |
| 1GLF | X-ray | 2.62 Å | O/X/Y/Z=2-502 |
| 1GLC | X-ray | 2.65 Å | G=2-502 |
| 1GLD | X-ray | 2.93 Å | G=2-502 |
| 1GLE | X-ray | 2.94 Å | G=2-502 |
| 1BWF | X-ray | 3.0 Å | O/Y=2-502 |
| 1GLJ | X-ray | 3.0 Å | O/Y=2-502 |
| 1GLL | X-ray | 3.0 Å | O/Y=2-502 |
| 1BOT | X-ray | 3.05 Å | O/Z=2-502 |
| 1BO5 | X-ray | 3.2 Å | O/Z=2-502 |
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