COMPASS component SDC1 (SDC1) is a 175-residue protein from Saccharomyces cerevisiae (strain ATCC 204508 / S288c). This is its AlphaFold structure prediction, created 1 Aug 2025. UniProt accession: Q03323.
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The mean pLDDT of this model is 67.3 (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 | 25% |
| 70 to 90 | Confident: backbone generally right | 5% |
| 50 to 70 | Low: treat with caution | 59% |
| Below 50 | Very low: often disordered regions | 11% |
What pLDDT means and how to read it
Component of the Set1C/COMPASS complex that specifically mono-, di- and trimethylates histone H3 to form H3K4me1/2/3, which subsequently plays a role in telomere length maintenance and transcription elongation regulation (PubMed:11742990, PubMed:11805083). COMPASS recognizes ubiquitinated H2B on one face of the nucleosome which stimulates the methylation of H3 on the opposing face (PubMed:31922488)
Component of the Set1C/COMPASS complex which consists of SET1(2), BRE2(2), SPP1(2), SDC1(1), SHG1(1), SWD1(1), SWD2(1), and SWD3(1) (PubMed:11687631, PubMed:11742990, PubMed:29071121, PubMed:30100186, PubMed:31922488). Interacts directly with BRE2 (PubMed:25542209)
Nucleus
Compare the prediction with experimentally determined structures of the same protein:
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