ID: h-gap-92152803-m2
Hypothesis
K48/K63 ubiquitin chain balance separates causal from compensatory states in: How do ALS-linked UBQLN2 mutations affect its ubiquitylation-dependent stability and
A longitudinal biomarker panel centered on K48/K63 ubiquitin chain balance can distinguish harmful mechanisms from protective adaptation.
EvidencePending (0%)📖 6 cit🗣 2 debates✓ 6 support✗ 1 oppose
✓ All Quality Gates Passed
🧪 Overview
A longitudinal biomarker panel centered on K48/K63 ubiquitin chain balance can distinguish harmful mechanisms from protective adaptation. The decisive experiment is to measure K48/K63 ubiquitin chain balance before and after phase-separation modifiers in stratified models.
🧬 Mechanism
🧬 Curated Mechanism Pathway
Curated pathway from expert analysis
flowchart TD
A["K48/K63 ubiquitin chain balance<br/>Hypothesis Target"]
B["Pathway Dysregulation<br/>Cited Mechanism"]
C["Cellular Response<br/>Stress or Clearance Change"]
D["Neural Circuit Effect<br/>Synapse/Glia Vulnerability"]
E["ALS<br/>Disease-Relevant Outcome"]
A --> B
B --> C
C --> D
D --> E
style A fill:#1a237e,stroke:#4fc3f7,color:#4fc3f7
style B fill:#b71c1c,stroke:#ef9a9a,color:#ef9a9a
style E fill:#b71c1c,stroke:#ef9a9a,color:#ef9a9a⚖️ Evidence
⚖️ Evidence Matrix5 supports1 contradicts
Supports
Stress granule homeostasis is modulated by TRIM21-mediated ubiquitination of G3BP1 and autophagy-dependent elimination of stress granules.
Supports
Rsp5/NEDD4 and ESCRT regulate TDP-43 toxicity and turnover via an endolysosomal clearance mechanism.
Supports
Listerin promotes cGAS protein degradation through the ESCRT pathway to negatively regulate cGAS-mediated immune response.
Supports
Loss of C9orf72 perturbs the Ran-GTPase gradient and nucleocytoplasmic transport, generating compositionally diverse Importin β-1 granules.
Contradicts
causal direction requires longitudinal perturbation
skeptic_round
📖 Linked Papers (15)Export BibTeX ↗
Rsp5/NEDD4 and ESCRT regulate TDP-43 toxicity and turnover via an endolysosomal clearance mechanism.
The Journal of cell biology (2026) · PubMed:41498748 ↗
14 figures
Figure 1.
A dot-blot genetic screen in yeast identifies genes regulating TDP-43 steady-state levels. (A) Schematic representation of the dot-blot genetic screen. (B) E...
Figure 2.
TDP-43 clearance and aggregation depend on ESCRT function. (A) Indicated strains were transformed with TDP-43-mRuby2 plasmid (pRB194) and grown to mid-logarith...
Stress granule homeostasis is modulated by TRIM21-mediated ubiquitination of G3BP1 and autophagy-dependent elimination of stress granules.
Autophagy (2023) · PubMed:36692217 ↗
1 figure
Figures
Figures available at source paper (no open-access XML found).
Rsp5/NEDD4 and ESCRT regulate TDP-43 toxicity and turnover via an endolysosomal clearance mechanism.
The Journal of cell biology (2026) · PubMed:41498748 ↗
No figures
Ripks and Neuroinflammation.
Molecular neurobiology (2024) · PubMed:38349514 ↗
No figures
Ripks and Neuroinflammation.
Molecular neurobiology (2024) · PubMed:38349514 ↗
No figures
Upregulation of NF-κB by USP24 aggravates ferroptosis in diabetic cardiomyopathy.
Free Radic Biol Med (2024) · PubMed:38056575 ↗
No figures
Listerin promotes cGAS protein degradation through the ESCRT pathway to negatively regulate cGAS-mediated immune response.
Proceedings of the National Academy of Sciences of the United States of America (2023) · PubMed:38109536 ↗
No figures
Listerin promotes cGAS protein degradation through the ESCRT pathway to negatively regulate cGAS-mediated immune response.
Proceedings of the National Academy of Sciences of the United States of America (2023) · PubMed:38109536 ↗
No figures
🏥 Translation
🧬 3D Protein Structure — K48
No curated PDB or AlphaFold mapping for K48 yet. Search RCSB →
💉 Clinical Trials
No clinical trials data linked to this hypothesis yet.
No curated ClinVar variants loaded for this hypothesis.
Run scripts/backfill_clinvar_variants.py to fetch P/LP/VUS variants.
No DepMap CRISPR Chronos data found for K48.
Run python3 scripts/backfill_hypothesis_depmap.py to populate.
🏆 Tournament
🏆 Arenas / Elo
No arena matches recorded yet. Browse Arenas →
📊 Market Indicators
7d Trend
↔
Stable
7d Momentum
▲ 0.0%
Volatility
High
0.1871
Events (7d)
1
Price History
▼1.7%💾 Resource Usage
No resource usage or linked notebooks recorded for this hypothesis yet.
🔮 Predictions
🔎 Predictions vs Observations2 predictions · 0 with recorded observations
| Prediction | Predicted | Observed | Status | Conf |
|---|---|---|---|---|
| IF chain balance is actionable, THEN correcting K48/K63 balance will reduce persistent G3BP1-positive stress granules by >=35% within 48 hours after oxidative stress. | Chain-balance intervention lowers persistent G3BP1 stress-granule fraction >=35% versus mutant untreated cells. | — no observation — | pending | 0.56 |
| IF K48/K63 ubiquitin chain balance separates causal from compensatory UBQLN2 states, THEN ALS-linked mutants will shift the K63:K48 chain ratio by >=30% before stress-granule persistence appears. | K63:K48 ubiquitin chain ratio changes >=30% at a timepoint preceding stress-granule persistence in mutant motor neurons. | — no observation — | pending | 0.61 |
🔮 Falsifiable Predictions (2)
pendingconf 61%
IF K48/K63 ubiquitin chain balance separates causal from compensatory UBQLN2 states, THEN ALS-linked mutants will shift the K63:K48 chain ratio by >=30% before stress-granule persistence appears.
Predicted outcome: K63:K48 ubiquitin chain ratio changes >=30% at a timepoint preceding stress-granule persistence in mutant motor neurons.
Falsification: Chain ratio changes <10% or changes only after persistent stress granules are already established.
pendingconf 56%
IF chain balance is actionable, THEN correcting K48/K63 balance will reduce persistent G3BP1-positive stress granules by >=35% within 48 hours after oxidative stress.
Predicted outcome: Chain-balance intervention lowers persistent G3BP1 stress-granule fraction >=35% versus mutant untreated cells.
Falsification: Persistent stress granules fall <10% despite validated chain-ratio correction.
▸Metadatasource: v1_phase_c_backfill · origin_type: debate_synthesis
| source | v1_phase_c_backfill |
| origin_type | debate_synthesis |
| _schema_version | 1 |
📊 Evidence Profile
Evidence Balance
+0%
Certainty
0%
Debates
0
Incoming
0
Outgoing
0
0 supporting
0 contradicting
0 neutral
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