The Role of Electrostatics in the Interaction of the Inhibitory Region of Troponin I with Troponin C
Bibliographic record
Abstract
We have addressed the electrostatic interactions occurring between the inhibitory region of cardiac troponin I with the C-lobe of troponin C using scanning glycine mutagenesis of the inhibitory region. We report variations in the electric potentials due to mutation of charged residues within this complex based upon the solved NMR structure (1OZS). These results demonstrate the importance of electrostatics within this complex, and it is proposed that electrostatic interactions are integral to the formation and function of larger ternary troponin complexes. To address this hypothesis, we report (15)N NMR relaxation measurements, which suggest that, within a ternary complex involving the C-lobe and the N-terminal region of troponin I (residues 34-71), the inhibitory region maintains the electrostatic interactions with the E-helix of the C-lobe as observed within the binary complex. These results imply that, in solution, the cardiac troponin complex behaves in a manner consistent with that of the crystal structure of the skeletal isoform (1YTZ). A cardiac troponin complex possessing domain orientations similar to that of the skeletal isoform provides structural insights into altered troponin I activities as observed for the familial hypertrophic cardiomyopathy mutation R144G and phosphorylation of Thr142.
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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".