Relationship between RNA splicing and exon editing near intron junctions in wheat mitochondria
Bibliographic record
Abstract
We have compared the RNA editing status of wheat mitochondrial unspliced precursor transcripts with spliced RNAs, focusing in particular on exon editing sites located very close to intron/exon junctions. Using direct sequencing of reverse transcriptase–PCR products to assess C‐to‐U editing in various RNA populations for the respiratory chain genes nad2 , nad4 , nad5 , nad7 , and cox2 , we observed that candidate exon sites immediately upstream or downstream of introns remained unedited in the presence of the adjacent intron, whereas sites further away were typically partially (or completely) edited in precursor molecules. The ‘late’ editing of exon sites adjacent to splice junctions is consistent with access of the editing machinery being sterically hindered by the intron or alternatively by an editing recognition element being created by the exon/exon structure. When we examined RNA isolated from the embryo‐to‐seedling stages of wheat development, we found that fully spliced messenger RNAs showed editing at the expected sites in all stages, including dormant seeds. In contrast, we observed that cox2 precursors were less completely edited in RNA populations from 0 to 24 h postimbibition embryos than in 6‐day‐old seedlings not only at splice junctions but also at other exon sites, consistent with more efficient coupling between editing and transcription during later stages of development.
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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) | 0.000 | 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 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".