Viral RNA polymerase as a SUMOylation decoy inhibits RNA quality control to promote potyvirus infection
Bibliographic record
Abstract
Potyvirids are the largest group of plant RNA viruses. Pelota, a core component of RNA quality controls (RQC), promotes the degradation of potyvirids’ genomic RNA by recognizing a specific G1-2A6-7 motif. Here we demonstrate that the viral RNA-dependent RNA polymerase, NIb, acts as a SUMOylation decoy to effectively reduce Pelota SUMOylation by competing with SCE1 to inhibit Pelota-mediated RQC. TuMV NIb is comprised of two functional SUMO interacting motif (SIM): SIM2 and SIM3. The former is identified as the key site for NIb’s SUMOylation by SUMO3, whereas the latter is responsible for the interaction with SCE1. These two SIMs are conserved among the majority of potyvirids-encoded NIbs. Thus, virus protein-mediated SUMOylation decoy strategy to suppress host defense may be a common feature in plant virus pathosystems. These findings highlight a dynamic interplay between plant defense mechanism and viral counter-strategy by orchestrating the post-translational modifications of virus and host defense components. SUMOylation of the host protein Pelota is known to contribute to host restriction of potyvirids. Here potyvirids-encoded RNA polymerases are shown to competitively interact with the SUMO E2 conjugating enzyme SCE1 and thereby function as SUMOylation decoys to repress plant defense.
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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 | 0.001 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.001 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| 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".