CST complex subunit STN1 (STN1) is a 368-residue protein from Homo sapiens. This is its AlphaFold structure prediction, created 1 Aug 2025. UniProt accession: Q9H668.
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The mean pLDDT of this model is 87.1 (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 | 66% |
| 70 to 90 | Confident: backbone generally right | 21% |
| 50 to 70 | Low: treat with caution | 7% |
| Below 50 | Very low: often disordered regions | 6% |
What pLDDT means and how to read it
Component of the CST complex proposed to act as a specialized replication factor promoting DNA replication under conditions of replication stress or natural replication barriers such as the telomere duplex. The CST complex binds single-stranded DNA with high affinity in a sequence-independent manner, while isolated subunits bind DNA with low affinity by themselves. Initially the CST complex has been proposed to protect telomeres from DNA degradation (PubMed:19854130). However, the CST complex has been shown to be involved in several aspects of telomere replication. The CST complex inhibits telomerase and is involved in telomere length homeostasis; it is proposed to bind to newly…
Component of the CST complex, composed of TEN1/C17orf106, CTC1/C17orf68 and STN1; in the complex interacts directly with TEN1 and CTC1. Interacts with ACD/TPP1, POT1 and POLA1
Nucleus, Chromosome, telomere
Compare the prediction with experimentally determined structures of the same protein:
| PDB ID | Method | Resolution | Chains and residues |
|---|---|---|---|
| 4JQF | X-ray | 1.6 Å | A=191-368 |
| 4JOI | X-ray | 2.05 Å | A/B=19-184 |
| 6W6W | EM | 3.0 Å | C=2-368 |
| 8D0B | EM | 3.43 Å | B=7-368 |
| 8SOJ | EM | 3.8 Å | B=1-368 |
| 8SOK | EM | 4.1 Å | B=1-368 |
| 8D0K | EM | 4.27 Å | B=2-368 |
| 7U5C | EM | 4.6 Å | F=1-368 |
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