Structural studies of carbon storage regulator, CsrA, from Escherichia coli by NMR spectroscopy
Bibliographic record
Abstract
CsrA of E. coli is a global regulatory RNA binding protein with a putative KH domain. My thesis work has been focused on characterization of the CsrA protein and its interactions with RNA by NMR spectroscopy. Gel filtration and PFG-NMR diffusion experiments indicate that CsrA primarily exists in oligomerized form, while acidic pH favors the formation of a dimer. The NMR structural characterization was carried out with the dimer form of CsrA. The CsrA subunit consists of five anti-parallel beta-sheets and one alpha-helix with a flexible C-terminus. The dimer is formed by sharing beta-sheets. Interactions of CsrA with RNA have been monitored by NMR. Upon titration with a 15-mer RNA (CACACGGAUUGUGUG), a complex was formed in slow exchange on the NMR timescale and gave rise to a large conformational change in the CsrA structure. The three-dimensional structure and the binding titration provide new insights into the regulatory mechanism.
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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) | 0.002 | 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".