26S proteasome complex subunit SEM1 (SEM1) is a 70-residue protein from Homo sapiens. This is its AlphaFold structure prediction, created 1 Aug 2025. UniProt accession: P60896.
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The mean pLDDT of this model is 69.5 (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 | 0% |
| 70 to 90 | Confident: backbone generally right | 43% |
| 50 to 70 | Low: treat with caution | 51% |
| Below 50 | Very low: often disordered regions | 6% |
What pLDDT means and how to read it
Component of the 26S proteasome, a multiprotein complex involved in the ATP-dependent degradation of ubiquitinated proteins. This complex plays a key role in the maintenance of protein homeostasis by removing misfolded or damaged proteins, which could impair cellular functions, and by removing proteins whose functions are no longer required. Therefore, the proteasome participates in numerous cellular processes, including cell cycle progression, apoptosis, or DNA damage repair (PubMed:15117943). Component of the TREX-2 complex (transcription and export complex 2), composed of at least ENY2, GANP, PCID2, SEM1, and either centrin CETN2 or CETN3 (PubMed:22307388). The TREX-2 complex functions…
Component of the 19S proteasome regulatory particle complex. The 26S proteasome consists of a 20S core particle (CP) and two 19S regulatory subunits (RP). The regulatory particle is made of a lid composed of 9 subunits including SEM1, a base containing 6 ATPases and few additional components (PubMed:27342858, PubMed:27428775). Belongs to the TREX-2 complex (transcription and export complex 2),…
Nucleus
Compare the prediction with experimentally determined structures of the same protein:
| PDB ID | Method | Resolution | Chains and residues |
|---|---|---|---|
| 3T5X | X-ray | 2.12 Å | B=1-70 |
| 9K53 | EM | 2.5 Å | e=1-70 |
| 8USB | EM | 2.73 Å | e=1-70 |
| 9MBP | EM | 2.75 Å | e=1-70 |
| 9DLP | EM | 2.79 Å | C=1-70 |
| 9NKG | EM | 2.8 Å | e=1-70 |
| 9E8I | EM | 2.87 Å | e=1-70 |
| 9BV3 | EM | 2.9 Å | e=1-70 |
| 9E8H | EM | 2.9 Å | e=1-65 |
| 9K4J | EM | 2.9 Å | e=1-70 |
| 9NKF | EM | 2.9 Å | e=1-70 |
| 9U3L | EM | 2.91 Å | e=1-70 |
| 9NKI | EM | 2.94 Å | e=1-70 |
| 9DLV | EM | 2.97 Å | C=1-70 |
| 6MSB | EM | 3.0 Å | e=1-70 |
| 7W37 | EM | 3.0 Å | e=1-70 |
| 8CVT | EM | 3.0 Å | e=1-70 |
| 9E8G | EM | 3.01 Å | e=1-70 |
| 9DLR | EM | 3.08 Å | C=1-70 |
| 1MIU | X-ray | 3.1 Å | B=1-70 |
Showing 20 of 122 experimental structures (best resolution first).
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