Ubiquitin-like protein SMT3 (SMT3) is a 101-residue protein from Saccharomyces cerevisiae (strain ATCC 204508 / S288c). This is its AlphaFold structure prediction, created 1 Aug 2025. UniProt accession: Q12306.
Explore in 3D Color by confidence AlphaFold DB UniProt
The mean pLDDT of this model is 78.3 (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 | 40% |
| 70 to 90 | Confident: backbone generally right | 33% |
| 50 to 70 | Low: treat with caution | 12% |
| Below 50 | Very low: often disordered regions | 16% |
What pLDDT means and how to read it
Ubiquitin-like protein that can be covalently attached to proteins as a monomer or a lysine-linked polymer (PubMed:9312010). Sumoylation, the attachment of SUMO to target proteins, regulates multiple cellular events (By similarity)
Activated by a E1 ligase composed of AOS1 and UBA2 (PubMed:9312010). Interacts with IRC20; the interaction is direct and occurs both covalently and non-covalently (PubMed:24155900)
Compare the prediction with experimentally determined structures of the same protein:
| PDB ID | Method | Resolution | Chains and residues |
|---|---|---|---|
| 3UF8 | X-ray | 1.5 Å | A=13-98 |
| 6UKZ | X-ray | 1.52 Å | A/B=2-98 |
| 3UQA | X-ray | 1.55 Å | A=13-98 |
| 3VAW | X-ray | 1.55 Å | A=13-98 |
| 5YCA | X-ray | 1.57 Å | A=20-93 |
| 7P7W | X-ray | 1.57 Å | AAA/BBB=2-96 |
| 1EUV | X-ray | 1.6 Å | B=13-98 |
| 6UKU | X-ray | 1.68 Å | A=2-98 |
| 7P7I | X-ray | 1.7 Å | AAA/BBB=2-96 |
| 6UKM | X-ray | 1.74 Å | A=2-98 |
| 4G50 | X-ray | 1.75 Å | A/B=13-98 |
| 6P81 | X-ray | 1.75 Å | A=13-101 |
| 7P9L | X-ray | 1.75 Å | AAA/BBB=2-96 |
| 6UL0 | X-ray | 1.76 Å | A=2-98 |
| 6UKV | X-ray | 1.83 Å | A/B=2-98 |
| 6O49 | X-ray | 1.85 Å | A/B=13-98 |
| 9OIK | X-ray | 1.86 Å | C/D=1-98 |
| 2EKE | X-ray | 1.9 Å | C/D=13-98 |
| 3UQB | X-ray | 1.9 Å | A=13-98 |
| 6UKX | X-ray | 1.93 Å | A/B=2-98 |
Showing 20 of 95 experimental structures (best resolution first).
MolViewer loads the AlphaFold model straight from AlphaFold DB into your browser. Show it as a cartoon, color by pLDDT, measure distances and angles, and load a PDB structure next to it to compare.