snRNA-activating protein complex subunit 4 (SNAPC4) is a 1469-residue protein from Homo sapiens. This is its AlphaFold structure prediction, created 1 Aug 2025. UniProt accession: Q5SXM2.
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The mean pLDDT of this model is 51.6 (low 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 | 10% |
| 70 to 90 | Confident: backbone generally right | 22% |
| 50 to 70 | Low: treat with caution | 13% |
| Below 50 | Very low: often disordered regions | 55% |
What pLDDT means and how to read it
Part of the SNAPc complex required for the transcription of both RNA polymerase II and III small-nuclear RNA genes. Binds to the proximal sequence element (PSE), a non-TATA-box basal promoter element common to these 2 types of genes. Recruits TBP and BRF2 to the U6 snRNA TATA box
Part of the SNAPc complex composed of 5 subunits: SNAPC1, SNAPC2, SNAPC3, SNAPC4 and SNAPC5. SNAPC4 interacts with SNAPC1, SNAPC2, SNAPC5, BRF2 and TBP
Nucleus
Compare the prediction with experimentally determined structures of the same protein:
| PDB ID | Method | Resolution | Chains and residues |
|---|---|---|---|
| 7ZWD | EM | 3.0 Å | c=1-1469 |
| 7ZX8 | EM | 3.0 Å | c=1-1469 |
| 9K3U | EM | 3.0 Å | 4=1-1469 |
| 7ZWC | EM | 3.2 Å | c=1-1469 |
| 9FSO | EM | 3.28 Å | W=2-1469 |
| 9LXN | EM | 3.3 Å | 4=1-1469 |
| 9FSP | EM | 3.39 Å | W=2-1469 |
| 7ZX7 | EM | 3.4 Å | c=1-1469 |
| 8IUH | EM | 3.4 Å | 4=1-1469 |
| 7XUR | EM | 3.49 Å | A=1-505 |
| 7ZXE | EM | 3.5 Å | c=1-1469 |
| 9K3V | EM | 3.5 Å | 4=1-1469 |
| 9FSQ | EM | 3.51 Å | W=2-1469 |
| 9FSR | EM | 3.76 Å | W=2-1469 |
| 8ITY | EM | 3.9 Å | 4=1-1469 |
| 8IUE | EM | 4.1 Å | 4=1-1469 |
| 9FSS | EM | 4.14 Å | W=2-1469 |
| 9K3B | EM | 4.8 Å | 4=1-1469 |
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