Calcium-binding protein 39 (CAB39) is a 341-residue protein from Homo sapiens. This is its AlphaFold structure prediction, created 1 Aug 2025. UniProt accession: Q9Y376.
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The mean pLDDT of this model is 94.7 (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 | 93% |
| 70 to 90 | Confident: backbone generally right | 4% |
| 50 to 70 | Low: treat with caution | 1% |
| Below 50 | Very low: often disordered regions | 3% |
What pLDDT means and how to read it
Component of a complex that binds and activates STK11/LKB1. In the complex, required to stabilize the interaction between CAB39/MO25 (CAB39/MO25alpha or CAB39L/MO25beta) and STK11/LKB1
Component of a trimeric complex composed of STK11/LKB1, STRAD (STRADA or STRADB) and CAB39/MO25 (CAB39/MO25alpha or CAB39L/MO25beta): the complex tethers STK11/LKB1 in the cytoplasm and stimulates its catalytic activity
Cytoplasm
Compare the prediction with experimentally determined structures of the same protein:
| PDB ID | Method | Resolution | Chains and residues |
|---|---|---|---|
| 1UPK | X-ray | 1.85 Å | A=1-341 |
| 3GNI | X-ray | 2.35 Å | A=1-341 |
| 1UPL | X-ray | 2.6 Å | A/B=1-341 |
| 2WTK | X-ray | 2.65 Å | A/D=1-341 |
| 8VSU | EM | 2.86 Å | A=1-341 |
| 4FZA | X-ray | 3.15 Å | A=11-334 |
| 4O27 | X-ray | 3.18 Å | A=11-333 |
| 4FZD | X-ray | 3.25 Å | A=11-334 |
| 4NZW | X-ray | 3.58 Å | A=8-334 |
| 4FZF | X-ray | 3.64 Å | A=11-334 |
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