Vacuolar aminopeptidase 1 (APE1) is a 514-residue protein from Saccharomyces cerevisiae (strain ATCC 204508 / S288c). This is its AlphaFold structure prediction, created 1 Aug 2025. UniProt accession: P14904.
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The mean pLDDT of this model is 94.0 (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 | 89% |
| 70 to 90 | Confident: backbone generally right | 4% |
| 50 to 70 | Low: treat with caution | 2% |
| Below 50 | Very low: often disordered regions | 5% |
What pLDDT means and how to read it
Resident vacuolar enzyme that catalyzes the removal of amino acids from the N-terminus of peptides and proteins. Also acts as the major cargo protein of the cytoplasm-to-vacuole targeting (Cvt) pathway. The precursor form of aminopeptidase 1 (prApe1) assembles into dodecamers and the propeptide mediates the aggregation of dodecamers into higher multimers. The multimers are then recognized via the propeptide by their receptor ATG19, and ATG19 further interacts with ATG11, which tethers the APE1-ATG19 complex to the pre-autophagosomal structure (PAS). The cargo-receptor complex (also Cvt complex) is selectively enwrapped by a double-membrane structure termed the Cvt vesicle under vegetative…
Homododecamer. The precursor form of aminopeptidase 1 (prApe1) assembles into dodecamers and further aggregates into higher multimers (the Ape1 complex) in the cytoplasm. The Ape1 complex is disaggregated in the vacuolar lumen, but mature aminopeptidase 1 (mApe1) retains its dodecameric form. Dodecamer assembly in the cytoplasm is essential for formation of an enzymatically active complex. If…
Vacuole
Compare the prediction with experimentally determined structures of the same protein:
| PDB ID | Method | Resolution | Chains and residues |
|---|---|---|---|
| 5JGF | X-ray | 1.83 Å | A/B/C/D=46-514 |
| 5JGE | X-ray | 1.91 Å | C/F=1-20 |
| 5JH9 | X-ray | 2.1 Å | A/B/C/D=1-514 |
| 4R8F | X-ray | 2.5 Å | A/B/C/D=46-514 |
| 5JHC | X-ray | 3.4 Å | A/B/C/D/E/F/G/H/I/J/K/L/M/N/O/P/Q/R/S/T/U/V/W/X/Y/Z/a/b/c/d=1-22 |
| 5JM9 | EM | 24.0 Å | A=1-514 |
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