How does TRIM21-mediated K63 ubiquitination of G3BP1 mechanistically inhibit liquid-liquid phase separation?

PARTIALLY ADDRESSED

The study shows that G3BP1 ubiquitination inhibits LLPS in vitro, but the molecular mechanism by which K63-linked ubiquitin chains prevent phase separation is not explained. Understanding this mechanism is crucial for developing targeted therapies for neurodegenerative diseases where pathological stress granules persist. Gap type: unexplained_observation Source paper: Stress granule homeostasis is modulated by TRIM21-mediated ubiquitination of G3BP1 and autophagy-dependent elimination of stress granules. (2023, Autophagy, PMID:36692217)

Priority: 0.82 Domain: neurodegeneration Hypotheses: 0

📊 Landscape Analysis

Landscape Summary: How does TRIM21-mediated K63 ubiquitination of G3BP1 mechanistically inhibit liquid-liquid phase separation? is a 0.82 priority gap in neurodegeneration. It has 0 linked hypotheses with average composite score 0.000. Status: partially_addressed.

Key Unanswered Questions

What is the optimal TREM2 modulation strategy across disease stages?
How does DAM activation state affect therapeutic outcomes?
What biomarkers predict response to TREM2-targeted interventions?

Key Researchers

Colonna, Sevlever, et al. (TREM2 biology)

Clinical Trials

How does TRIM21-mediated K63 ubiquitination of G3BP1 mechanistically inhibit liquid-liquid phase separation? — INVOKE-2 (completed)

📈 Living Dashboards

0

Hypotheses

0.000

Top Score

0.000

Avg Score

0

Debates

0.00

Avg Quality

60%

Resolution

0

Mechanistic Families

Gap Resolution Progress60%

Hypothesis Score Distribution

🏆 Competing Hypotheses (Ranked by Score)

No hypotheses linked to this gap yet.

🌊 Knowledge Graph Connections

activates (5)

G3BP1→PI3K/Akt signalingG3BP1→phase separationIntracellular Free Rna→G3BP1G3BP1→stress granulesG3BP1→Stress Granules

associated with (3)

G3BP1→Stress GranulesG3BP1→STRESS GRANULETRIM21→G3BP1

binds (1)

component of (2)

G3BP1→Stress GranuleG3BP1→Stress Granules

encodes (1)

expressed in (1)

hiPSC-derived lung organoid→G3BP1

inhibits (1)

G3BP1→axonal mRNA translation

interacts with (4)

G3BP1→SLU7G3BP1→LINC00599G3BP1→Stress GranuleLINC00599→G3BP1

involved in (6)

G3BP1→STRESS GRANULE DISASSEMBLYG3BP1→Stress Granule FormationG3BP1→stress granule formationG3BP1→stress granule-like structuresG3BP1→Stress Granule

▸ Show 1 more

G3BP1→Liquid-Liquid Phase Separation

mediates (7)

G3BP1→LIQUID-LIQUID PHASE SEPARATIONG3BP1→Stress Granule DisassemblyG3BP1→Liquid-Liquid Phase SeparationG3BP1→Stress Granule FormationUBIQUITIN→G3BP1

▸ Show 2 more

G3BP1→Stress Granule AssemblyG3BP1→Stress Granules

modulates (4)

Ubiquitination→G3BP1UBIQUITINATION→G3BP1PHOSPHORYLATION→G3BP1TRIM21→G3BP1

nucleates (1)

G3BP1→stress_granules

phosphorylates (1)

promotes (1)

G3BP1→immune evasion

regulates (6)

G3BP1→STRESS GRANULE ASSEMBLYG3BP1→stress granule formationubiquitination→G3BP1G3BP1→STRESS GRANULE-SPECIFIC INTERACTION NETWORKG3BP1→Ribonucleoprotein Granules

▸ Show 1 more

G3BP1→liquid-liquid phase separation

risk factor for (1)

G3BP1→anti-PD-1 therapy response

targets (3)

h-ec731b7a→G3BP1h-fffd1a74→G3BP1h-97aa8486→G3BP1

targets gene (1)

h-27bc0569→G3BP1

ubiquitinates (1)

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