Positional Impact of Fluorescently Modified G-Tetrads within Polymorphic Human Telomeric G-Quadruplex Structures
Bibliographic record
Abstract
Emissive C8-aryl-2'-deoxyguanosines placed within G-tetrads of G-quadruplex structures are useful probes for distinguishing G-quadruplexes from duplex structures using fluorescence spectroscopy. Here, we report the positional impact of C8-furyl-dG ((Fur)dG) on G-quadruplex folding in the human telomere 22-mer oligonucleotide (HTelo22, (d[AG3(T2AG3)3])). The (Fur)dG probe was inserted into four different positions within the three unique G-tetrads of HTelo22, and G-quadruplex folding was monitored by UV-vis thermal denaturation, circular dichroism, and fluorescence spectroscopy. Our studies demonstrate the impacts of C8-aryl-dG adduct formation on G-quadruplex polymorphism in K(+) solution and in the presence of the additives and cosolutes, CH3CN, polyethylene glycol (PEG-600), and N-methyl mesoporphyrin IX (NMM). Our experiments predict that C8-aryl-dG derivatives can serve as useful tools for various in vitro studies aimed at understanding both the implications of DNA adduct formation within G-quadruplex structures and the unique implications imposed by various folding topologies on biological function/recognition.
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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".