Maltose/maltodextrin import ATP-binding protein MalK (malK) is a 371-residue protein from Escherichia coli (strain K12). This is its AlphaFold structure prediction, created 1 Aug 2025. UniProt accession: P68187.
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The mean pLDDT of this model is 93.8 (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 | 87% |
| 70 to 90 | Confident: backbone generally right | 14% |
| 50 to 70 | Low: treat with caution | 0% |
| Below 50 | Very low: often disordered regions | 0% |
What pLDDT means and how to read it
Part of the ABC transporter complex MalEFGK involved in maltose/maltodextrin import. Responsible for energy coupling to the transport system
The complex is composed of two ATP-binding proteins (MalK), two transmembrane proteins (MalG and MalF) and a solute-binding protein (MalE). Protein stability and stable complex formation require YidC
Cell inner membrane
Compare the prediction with experimentally determined structures of the same protein:
| PDB ID | Method | Resolution | Chains and residues |
|---|---|---|---|
| 3RLF | X-ray | 2.2 Å | A/B=1-371 |
| 2AWN | X-ray | 2.3 Å | A/B/C/D=1-371 |
| 3PUW | X-ray | 2.3 Å | A/B=1-371 |
| 3PUX | X-ray | 2.3 Å | A/B=1-371 |
| 4KI0 | X-ray | 2.38 Å | A/B=1-371 |
| 3PUV | X-ray | 2.4 Å | A/B=1-371 |
| 1Q12 | X-ray | 2.6 Å | A/B/C/D=1-371 |
| 3GD7 | X-ray | 2.7 Å | A/B/C/D=219-371 |
| 1Q1B | X-ray | 2.8 Å | A/B/C/D=1-371 |
| 2AWO | X-ray | 2.8 Å | A/B/C/D=1-371 |
| 2R6G | X-ray | 2.8 Å | A/B=1-371 |
| 1Q1E | X-ray | 2.9 Å | A/B=1-371 |
| 3PUZ | X-ray | 2.9 Å | A/B=1-371 |
| 3PUY | X-ray | 3.1 Å | A/B=1-371 |
| 3PV0 | X-ray | 3.1 Å | A/B=1-371 |
| 9BCR | EM | 3.26 Å | C/D=2-371 |
| 9NQJ | EM | 3.34 Å | A/B=2-371 |
| 9NXC | EM | 3.51 Å | C/D=2-371 |
| 4JBW | X-ray | 3.91 Å | A/B/C/D=1-371 |
| 3FH6 | X-ray | 4.5 Å | A/B/C/D=1-371 |
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