Probing the Chemical Space of Polymerase Theta with Nucleotide Analogues Bearing a Stereogenic All-Carbon Quaternary Center
Bibliographic record
Abstract
We report findings on a novel family of nucleotide analogues with selective inhibitory activity against DNA polymerase theta (Polθ), a key enzyme in the theta-mediated end joining pathway and a critical player in synthetic lethality-based cancer therapies. Polθ's intrinsically low fidelity, which contributes to genomic instability in homologous recombination-deficient tumors, was probed for selective targeting by these analogues. The newly identified compounds feature an all-carbon stereogenic quaternary center at either the C3' or C2' position of the furanoside ring, a structural modification that has already demonstrated potential in antiviral, anticancer, and cardioprotective applications. Biochemical assays suggest these analogues exploit Polθ's unique active site architecture, offering a possible direction for overcoming PARP inhibitor resistance and enhancing personalized cancer treatment strategies.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".