The Phospholipid Transfer Protein Sec14 is Required for Trafficking from Endosomes and Regulates Distinct trans‐Golgi Export Pathways
Bibliographic record
Abstract
Vesicle fission, transport, and fusion are affected by membrane lipid composition. A protein known to regulate both lipid metabolism and vesicular transport is the phosphatidylcholine/phosphatidylinositol transfer protein Sec14 of Saccharomyces cerevisiae . We determined that decreasing Sec14 function affected secretion via the endosome dependent invertase route as well as the endosome independent route followed by Bgl2. Trafficking of a series of other secreted proteins including Hsp150, Cts1, Scw4, Scw10, Exg1, Cis3, and Ygp1 still occurred. Upon diminution of Sec14 function the v‐SNARE Snc1 accumulated in endosomes and the trans ‐Golgi but was competent to traffic from the Golgi to the plasma membrane. Sec14 was required for trafficking of Ste3 and the lipophilic dye FM4‐64 from the plasma membrane to the vacuole at the level of endosomes. The results from a synthetic genetic array screen for genes whose inactivation impaired growth of cells with a temperature sensitive SEC14 allele, sec14 ts , were consistent with Sec14 regulating endosome function. We go on to determine that lipid ligand occupancy by Sec14 can differentially regulate its functions. (Supported by CIHR and the Canada Research Chairs Fund)
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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 | 0.001 |
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".