Immunoglobulin alpha Fc receptor (FCAR) is a 287-residue protein from Homo sapiens. This is its AlphaFold structure prediction, created 1 Aug 2025. UniProt accession: P24071.
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The mean pLDDT of this model is 83.6 (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 | 60% |
| 70 to 90 | Confident: backbone generally right | 17% |
| 50 to 70 | Low: treat with caution | 15% |
| Below 50 | Very low: often disordered regions | 8% |
What pLDDT means and how to read it
Binds to the Fc region of immunoglobulins alpha. Mediates several functions including cytokine production
Associates with the Fc epsilon RI gamma 2 receptor inducing tyrosine phosphorylation of gamma 2
Cell membrane, Secreted
Compare the prediction with experimentally determined structures of the same protein:
| PDB ID | Method | Resolution | Chains and residues |
|---|---|---|---|
| 1UCT | X-ray | 2.1 Å | A=20-229 |
| 9OFR | X-ray | 2.65 Å | C/D/F/H=22-216 |
| 1OVZ | X-ray | 3.0 Å | A/B=22-216 |
| 1OW0 | X-ray | 3.1 Å | C/D=22-216 |
| 8SKU | EM | 3.2 Å | R/S=22-216 |
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