Translocon-associated protein subunit alpha (SSR1) is a 286-residue protein from Homo sapiens. This is its AlphaFold structure prediction, created 1 Aug 2025. UniProt accession: P43307.
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The mean pLDDT of this model is 76.1 (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 | 47% |
| 70 to 90 | Confident: backbone generally right | 16% |
| 50 to 70 | Low: treat with caution | 19% |
| Below 50 | Very low: often disordered regions | 19% |
What pLDDT means and how to read it
TRAP proteins are part of a complex whose function is to bind calcium to the ER membrane and thereby regulate the retention of ER resident proteins. May be involved in the recycling of the translocation apparatus after completion of the translocation process or may function as a membrane-bound chaperone facilitating folding of translocated proteins
Heterotetramer of TRAP-alpha, TRAP-beta, TRAP-delta and TRAP-gamma (PubMed:36697828). Interacts with palmitoylated calnexin (CALX), the interaction is required for efficient folding of glycosylated proteins (PubMed:22314232)
Endoplasmic reticulum membrane
Compare the prediction with experimentally determined structures of the same protein:
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