Lipid membrane interactions of a fluorinated peptide with potential ion channel‐forming ability
Why this work is in the frame
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Bibliographic record
Abstract
Abstract Fluorinated peptides attract much interest in the biomedical area because they generally exhibit an enhanced stability compared to their hydrogenated counterparts and because fluorine atoms represent efficient probes to investigate peptide assemblies, especially in membranes. We previously designed and characterized a fluorinated peptide intended to form ion channels in membranes. This peptide, designated as LX2, adopts a predominantly α‐helical structure and acts as a selective ion channel for various cations. Molecular dynamics indicated that the peptide tetrameric form would be favored. However, the interactions of LX2 with model membranes have not been studied experimentally. Here we investigated the interactions of LX2 and its acetylated form, Ac‐LX2, with eukaryotic model membranes using CD and infrared spectroscopy, as well as 19 F, 2 H, and 31 P NMR spectroscopy. 19 F NMR results indicate that the peptides undergo restrained motions in the presence of membranes, which strongly suggests their insertion in membranes. Both LX2 and Ac‐LX2 adopt a well‐defined α‐helical structure, in contrast with the secondary structure observed in hexafluoroisopropanol. The alterations of lipid organization due to LX2 peptides appear overall relatively small but the results suggest that the two peptides are located in the membrane hydrophobic core, LX2 being closer to the interfacial region than Ac‐LX2.
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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 | 0.001 |
| 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