The Distribution, Evolution, and Roles of Gene Transfer Agents in Prokaryotic Genetic Exchange
Bibliographic record
Abstract
Diverse prokaryotes produce gene transfer agents (GTAs), which are bacteriophage-like particles that exclusively package pieces of the producing cell's genome and transfer them to other cells. There are clear evolutionary connections between GTAs and phages, but GTAs have properties that lead us to suggest they are more than simply defective phages and instead provide a selective advantage for the producing organisms. The five types of currently known GTAs are genetically distinct, indicating multiple instances of convergent evolution. GTA production can be regulated by the producing organism and coordinated to coincide with development of the capability to receive DNA from GTAs. Recent discoveries of the genetic basis of GTA production in the bacterium Rhodobacter capsulatus and characterization of novel phages that possess homologs of this GTA's structural and regulatory genes have provided important new connections among these elements and highlight the tangled evolutionary relationships within the phageome.
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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) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.001 |
| 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".