Histone H3 (JZ751_013115) is a 136-residue protein from Albula glossodonta (roundjaw bonefish). This is its AlphaFold structure prediction, created 31 Mar 2025. UniProt accession: A0A8T2P505.
Explore in 3D Color by confidence AlphaFold DB UniProt
The mean pLDDT of this model is 86.6 (confident 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 | 69% |
| 70 to 90 | Confident: backbone generally right | 5% |
| 50 to 70 | Low: treat with caution | 25% |
| Below 50 | Very low: often disordered regions | 1% |
What pLDDT means and how to read it
The nucleosome is a histone octamer containing two molecules each of H2A, H2B, H3 and H4 assembled in one H3-H4 heterotetramer and two H2A-H2B heterodimers. The octamer wraps approximately 147 bp of DNA
Chromosome, Nucleus
Compare the prediction with experimentally determined structures of the same protein:
| PDB ID | Method | Resolution | Chains and residues |
|---|---|---|---|
| 9QIK | EM | 3.03 Å | E/F=1-136 |
MolViewer loads the AlphaFold model straight from AlphaFold DB into your browser. Show it as a cartoon, color by pLDDT, measure distances and angles, and load a PDB structure next to it to compare.