Functional characterization of naturally occurring mutant transglutaminase 2
Bibliographic record
Abstract
Transglutaminase 2 (TG2) is a functionally and structurally complex ubiquitous protein. TG2 has Ca2+-dependent transamidating activity, can bind and hydrolyze ATP/GTP, function as a G-protein in intracellular signaling, and has reported kinase activity. TG2 knockout mice are observed to have impaired glucose-stimulated insulin secretion (GSIS). Three naturally occurring mutations, including Met330Arg, Ile331Asn, and Asn333Ser, have been reported in the TG2 protein and observed to be related with maturity onset diabetes of the young (MODY). Overexpression of the naturally occurring Myc-tag mutants in INS-1E cells generated a loss in GSIS compared to wild type-TG2 overexpression. Each mutant was shown to have diminished transamidation and kinase activities, along with altered GTP-binding which was responsive to glucose stimulation. Naturally occurring mutations in TG2 impact the transamidation, kinase, and GTP-binding functions of TG2. The GTP-binding function of TG2 has a significant impact on GSIS from pancreatic beta cells in addition to its transamidating activity.
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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 | 0.001 |
| Insufficient payload (model declined to judge) | 0.001 | 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".