Eukaryotic-like phosphoprotein phosphatase (PPP) enzyme evolution: interactions with environmental toxins and regulatory proteins
Why this work is in the frame
A frame that forgets how it found something cannot be audited. These are the routes that admitted this work.
Bibliographic record
Abstract
Phosphoprotein phosphatases (PPPs) are a ubiquitous class of enzymes which dephosphorylate serine and threonine residues on substrate proteins involved in a wide variety of cellular processes. The active site of PPP enzymes are highly conserved with key residues coordinating the substrate phosphoryl group (the two R-clamp) and two metal ions necessary for catalysis. Because of the diverse number of roles that these enzymes play it is no surprise that they are highly regulated in the cell, often accomplished by binding regulatory subunits. These regulatory subunits are able to dictate substrate specificity, localization, and activity of the bound catalytic subunit. Eukaryotic PPP subtypes have been previously shown to manifest varying degrees of sensitivity to environmental toxins. We present here an evolutionary model which now rationalizes this data. Our re-examination of published structural evidence reveals that Eukaryotic PPP toxin-binding residues also interact with substrate binding residues (the two R-clamp) and ancient regulatory proteins. Such functional interactions could have stabilized PPP sequence early in Eukaryotic evolution, providing a stable target which was co-opted by toxins and their producer organisms.
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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 | 0.000 |
| 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 it