Photosystem I reaction center subunit II-2, chloroplastic (PSAD2) is a 204-residue protein from Arabidopsis thaliana. This is its AlphaFold structure prediction, created 1 Aug 2025. UniProt accession: Q9SA56.
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The mean pLDDT of this model is 79.8 (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 | 58% |
| 70 to 90 | Confident: backbone generally right | 11% |
| 50 to 70 | Low: treat with caution | 19% |
| Below 50 | Very low: often disordered regions | 12% |
What pLDDT means and how to read it
PSAD can form complexes with ferredoxin and ferredoxin-oxidoreductase in photosystem I (PS I) reaction center. PSAD may encode the ferredoxin-docking protein (By similarity)
Interacts with CURT1C
Plastid, chloroplast thylakoid membrane
Compare the prediction with experimentally determined structures of the same protein:
| PDB ID | Method | Resolution | Chains and residues |
|---|---|---|---|
| 8J6Z | EM | 2.79 Å | D=1-204 |
| 8J7A | EM | 3.06 Å | D=1-204 |
| 9GBI | EM | 3.13 Å | D=45-204 |
| 8J7B | EM | 3.22 Å | D=1-204 |
| 7WFD | EM | 3.25 Å | AD=1-204 |
| 7WFE | EM | 3.25 Å | BD=1-204 |
| 9GC2 | EM | 3.29 Å | D=45-204 |
| 7WG5 | EM | 3.89 Å | AD/BD=1-204 |
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