EHEC utilizes two-component systems to modulate expression of the major flagellar subunit protein, FliC, in response to host intestinal cues
Bibliographic record
Abstract
Enterohemorrhagic Escherichia coli (EHEC) O157:H7 is a food- and water-borne human enteric pathogen that infects human hosts. In order to colonize the host, EHEC uses many virulence factors including flagella to reach its site of colonization in the distal colon. Expression of flagella can be modulated in response to microenvironmental conditions within the host, sensed by two-component systems (TCS). We have demonstrated through immunoblot and motility assays that small intestinal short-chain fatty acid (SCFA) mixes upregulate flagella expression while large intestinal mixes downregulate expression in WT EHEC. We have also shown that three specific TCSs in EHEC are necessary for establishment of the SCFA-induced WT phenotype. Our results suggest that the ArcAB and RcsBC TCSs positively modulate flagella expression in response to small intestinal-like environmental conditions, while the BarA/UvrY TCS negatively modulates flagella expression in response to large intestinal-like environmental cues.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| 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) | 0.001 | 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 source (direct Gemma or distilled Codex), 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".