Signal recognition particle 9 kDa protein (SRP9) is a 86-residue protein from Canis lupus familiaris. This is its AlphaFold structure prediction, created 1 Aug 2025. UniProt accession: P21262.
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The mean pLDDT of this model is 90.8 (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 | 2% |
| 50 to 70 | Low: treat with caution | 7% |
| Below 50 | Very low: often disordered regions | 5% |
What pLDDT means and how to read it
Component of the signal recognition particle (SRP) complex, a ribonucleoprotein complex that mediates the cotranslational targeting of secretory and membrane proteins to the endoplasmic reticulum (ER) (PubMed:6413076, PubMed:6938958). SRP9 together with SRP14 and the Alu portion of the SRP RNA, constitutes the elongation arrest domain of SRP (PubMed:6413076, PubMed:6938958). The complex of SRP9 and SRP14 is required for SRP RNA binding (PubMed:6413076, PubMed:6938958)
Heterodimer with SRP14; binds RNA as heterodimer (PubMed:6413076). Component of a signal recognition particle complex that consists of a 7SL RNA molecule of 300 nucleotides and six protein subunits: SRP72, SRP68, SRP54, SRP19, SRP14 and SRP9 (PubMed:6413076, PubMed:6938958)
Cytoplasm
Compare the prediction with experimentally determined structures of the same protein:
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