Structure-function investigation of a deoxyribozyme with dual chelatase and peroxidase activities
Why this work is in the frame
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Bibliographic record
Abstract
Abstract PS2.M, an 18-nucleotide DNA molecule, has been shown to be a dual enzyme for porphyrin metallation and, when complexed with hemin, for peroxidation. To date, detailed information has not been available on either the actively folded structure of PS2.M or on the contribution of specific nucleotides within it toward the peroxidase activity. Here, we report a variety of experiments that probe the structure and function of PS2.M as well as of a number of point mutants of PS2.M. Based on these experiments, a structural model for the folding of PS2.M and the location of a functionally relevant hemin-binding site are proposed. A key finding is that PS2.M, originally obtained by in vitro selection from a random-sequence DNA library, is uniquely suited for its catalysis of peroxidation; all point mutants examined showed significantly poorer catalytic activity than PS2.M itself.
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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 it