Cloning and Characterization of the Murine Glucosamine-6-phosphate Acetyltransferase EMeg32
Bibliographic record
Abstract
N-Linked glycosylation is a post-translational modification occurring in many eukaryotic secreted and surface-bound proteins and has impact on diverse physiological and pathological processes. Similarly important is the generation of glycosylphosphatidylinositol linkers, which anchor membrane proteins to the cell. Both protein modifications depend on the central nucleotide sugar UDP-N-acetylglucosamine (UDP-GlcNAc). The enzymatic reactions leading to generation of nucleotide sugars are established, yet most of the respective genes still await cloning. We describe the characterization of such a gene, EMeg32, which we identified based on its differential expression in murine hematopoietic precursor cells. We further demonstrate regulated expression during embryogenesis. EMeg32 codes for a 184-amino acid protein exhibiting glucosamine-6-phosphate acetyltransferase activity. It thereby holds a key position in the pathway toward de novo UDP-GlcNAc synthesis. Surprisingly, the protein associates with the cytoplasmic side of various intracellular membranes, accumulates prior to mitosis, and copurifies with the cdc48 homolog p97/valosin-containing protein.
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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 | 0.002 |
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".