Demonstration of the role of cell wall homeostasis in <i>Staphylococcus aureus</i> growth and the action of bactericidal antibiotics
Bibliographic record
Abstract
Significance The bacterial cell wall peptidoglycan is essential for maintenance of viability and yet is dynamic, permitting growth and division. Peptidoglycan synthesis is inhibited by important antibiotics, including β-lactams and vancomycin. Using the human pathogen Staphylococcus aureus , we have examined peptidoglycan homeostatic mechanisms and how their interruption leads to cell death. This has revealed two antibiotic-induced killing mechanisms mediated by specific peptidoglycan hydrolases, both involving the appearance of holes that span the entire thickness of the cell wall. One of the mechanisms is associated with growth and the other with cell division. This study supports a simple model for how cells grow via a combination of peptidoglycan synthesis and hydrolysis and how antibiotic intervention leads to cell death.
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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 | 0.001 |
| 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 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".