Actin-related protein 2 (arp2) is a 390-residue protein from Schizosaccharomyces pombe (strain 972 / ATCC 24843). This is its AlphaFold structure prediction, created 1 Aug 2025. UniProt accession: Q9UUJ1.
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The mean pLDDT of this model is 93.4 (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 | 86% |
| 70 to 90 | Confident: backbone generally right | 11% |
| 50 to 70 | Low: treat with caution | 2% |
| Below 50 | Very low: often disordered regions | 1% |
What pLDDT means and how to read it
Functions as ATP-binding component of the Arp2/3 complex which is involved in regulation of actin polymerization and together with an activating nucleation-promoting factor (NPF) mediates the formation of branched actin networks. Seems to contact the pointed end of the daughter actin filament (By similarity). During cytokinesis it colocalizes to the cortical actin patches until spetation is complete. Has a role in the mobility of these patches. Essential for viability
Component of the Arp2/3 complex composed of arp2, act2, arc1/p41-ARC, arc2/p34-ARC, arc3/p21-ARC, arc4/p20-ARC and arc5/p16-ARC
Cytoplasm, cytoskeleton, actin patch
Compare the prediction with experimentally determined structures of the same protein:
| PDB ID | Method | Resolution | Chains and residues |
|---|---|---|---|
| 8UXW | EM | 2.7 Å | B=1-390 |
| 8UXX | EM | 3.2 Å | B=1-390 |
| 8E9B | EM | 3.5 Å | B=1-390 |
| 6W17 | EM | 3.9 Å | B=1-390 |
| 6W18 | EM | 4.2 Å | B=1-390 |
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