ID: h-fa757ac897
Hypothesis

Membrane interfacial selectivity for lipid-anchored pathologic conformers

Membrane interfacial selectivity for lipid-anchored pathologic conformers starts from the claim that modulating SNCA, HSPA8, DNAJB6 within the disease context of protein biochemistry can redirect a disease-relevant process.
🧬 SNCA, HSPA8, DNAJB6🩺 protein-biochemistry🎯 Composite 52%💱 $0.52▼3.6%proposed
protein biochemistry
EvidencePending (0%)📖 7 cit🗣 1 debates 7 support 2 oppose
✓ All Quality Gates Passed
Mechanistic 0.50 (15%) Evidence 0.52 (15%) Novelty 0.72 (12%) Feasibility 0.48 (12%) Impact 0.58 (12%) Druggability 0.42 (10%) Safety 0.58 (8%) Competition 0.65 (6%) Data Avail. 0.48 (5%) Reproducible 0.45 (5%) KG Connect 0.50 (8%) 0.518 composite

🧪 Overview

Mechanistic Overview


Membrane interfacial selectivity for lipid-anchored pathologic conformers starts from the claim that modulating SNCA, HSPA8, DNAJB6 within the disease context of protein biochemistry can redirect a disease-relevant process. The original description reads: "## Mechanistic Overview Membrane interfacial selectivity for lipid-anchored pathologic conformers starts from the claim that modulating SNCA, HSPA8, DNAJB6 within the disease context of protein biochemistry can redirect a disease-relevant process. The original description reads: "## Mechanistic Overview Membrane interfacial selectivity for lipid-anchored pathologic conformers starts from the claim that α-synuclein exists in distinct membrane-bound conformations: α-helical (physiologic, on synaptic vesicles) vs. β-sheet-rich (pathologic, on disrupted membranes). HSP70 preferentially binds the helical conformation via membrane curvature-dependent recognition, enabling differential engagement with physiologic versus pathologic membrane-associated states. Framed more explicitly, the hypothesis centers SNCA, HSPA8, DNAJB6 within the broader disease setting of protein biochemistry.

...

🧬 Mechanism

🧬 Curated Mechanism Pathway

Curated pathway from expert analysis

flowchart TD
    A["SNCA Alpha-Synuclein<br/>Presynaptic Protein"]
    B["SNCA Misfolding<br/>Environmental Stress"]
    C["SNCA Oligomers<br/>Toxic Protofibrils"]
    D["Mitochondrial Pore<br/>Membrane Disruption"]
    E["Lewy Body Formation<br/>Cytoplasmic Inclusions"]
    F["Dopaminergic Neuron<br/>Dysfunction/Death"]
    G["Nigrostriatal Degeneration<br/>Motor Symptoms"]
    H["SNCA A53T/A30P/E46K<br/>Familial PD Mutations"]
    A --> B
    B --> C
    C --> D
    C --> E
    D --> F
    E --> F
    F --> G
    H -.->|"accelerates"| B
    style A fill:#1a237e,stroke:#4fc3f7,color:#4fc3f7
    style C fill:#b71c1c,stroke:#ef9a9a,color:#ef9a9a
    style G fill:#b71c1c,stroke:#ef9a9a,color:#ef9a9a
    style H fill:#7b1fa2,stroke:#ce93d8,color:#ce93d8

⚖️ Evidence

⚖️ Evidence Matrix7 supports2 contradicts
Supports
Membrane-bound α-synuclein adopts distinct conformations with differential chaperone accessibility
Supports
α-synuclein membrane interactions are disrupted in pathogenic conformers
Supports
Recombinant pro-CTSD (cathepsin D) enhances SNCA/α-Synuclein degradation in α-Synucleinopathy models.
Autophagy2022PMID:35287553medium
Supports
Arginine methylation of HSPA8 by PRMT9 inhibits ferroptosis to accelerate hepatitis B virus-associated hepatocellular carcinoma progression.
J Transl Med2023PMID:37715221medium
Supports
Autophagy mediates the clearance of oligodendroglial SNCA/alpha-synuclein and TPPP/p25A in multiple system atrophy models.
Autophagy2022PMID:35000546medium
Supports
BAG5 regulates HSPA8-mediated protein folding required for sperm head-tail coupling apparatus assembly.
EMBO Rep2024PMID:38454159medium
Supports
HBx-Induced HSPA8 Stimulates HBV Replication and Suppresses Ferroptosis to Support Liver Cancer Progression.
Cancer Res2023PMID:36745032medium
Contradicts
Mechanism for HSP70 membrane curvature sensing is not well-established
Contradicts
Limited data on whether pathologic membrane-associated species are distinct targets vs. off-pathway intermediates
📖 Linked Papers

No linked papers recorded for this hypothesis yet.

🏥 Translation

🧬 3D Protein Structure — SNCA

🧬 PDB 1XQ8 Click to expand

Experimental structure from RCSB PDB | Powered by Mol*

🧠 GTEx v10 Brain ExpressionJSON

Median TPM across 13 brain regions for SNCA, HSPA8, DNAJB6 from GTEx v10.

Cerebellar Hemisphere61.9 Frontal Cortex BA959.1 Anterior cingulate cortex BA2447.5 Cerebellum44.6 Cortex36.0 Spinal cord cervical c-125.7 Amygdala24.9 Nucleus accumbens basal ganglia21.6 Substantia nigra20.8 Hippocampus19.0 Hypothalamus18.5 Caudate basal ganglia13.5 Putamen basal ganglia12.4median TPM (GTEx v10)

💉 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.

🔍 Search ClinVar for SNCA, HSPA8, DNAJB6 →

No DepMap CRISPR Chronos data found for SNCA, HSPA8, DNAJB6.

Run python3 scripts/backfill_hypothesis_depmap.py to populate.

💰 Estimated Development
Cost
$0
Timeline

🏆 Tournament

🏆 Arenas / Elo

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📊 Market Indicators

7d Trend
Stable
7d Momentum
▼ 0.4%
Volatility
Low
0.0129
Events (7d)
3
Price History
▼3.6%

💾 Resource Usage

LLM Tokens
14,768
$0.0443
Total Cost
$0.0443

🔮 Predictions

🔎 Predictions vs Observations2 predictions · 0 with recorded observations
PredictionPredictedObservedStatusConf
IF DNAJB6 is knocked down ≥70% using siRNA in human iPSC-derived dopaminergic neurons for 7 days, THEN the rate of SNCA accumulation on disrupted vesicles will increase ≥2-fold as measured by cryo-EM ≥2-fold increase in disrupted vesicle-associated SNCA puncta and ≥50% increase in cryo-EM scored morphologically disrupted vesicles per neuron— no observation —pending0.50
IF HSPA8 is overexpressed 2-fold in primary neurons derived from SNCA A53T transgenic mice for 48-72 hours, THEN membrane-bound SNCA will shift toward α-helical secondary structure as measured by FTIR≥40% reduction in Thioflavin-T positive SNCA aggregates and ≥30% increase in α-helical FTIR signal at membrane fractions— no observation —pending0.55
🔮 Falsifiable Predictions (2)
pendingconf 55%
IF HSPA8 is overexpressed 2-fold in primary neurons derived from SNCA A53T transgenic mice for 48-72 hours, THEN membrane-bound SNCA will shift toward α-helical secondary structure as measured by FTIR spectroscopy, with a concurrent ≥40% reduction in Thioflavin-T positive aggregates.
Predicted outcome: ≥40% reduction in Thioflavin-T positive SNCA aggregates and ≥30% increase in α-helical FTIR signal at membrane fractions
Falsification: No significant change in SNCA secondary structure or aggregate load despite HSPA8 overexpression (>2-fold by western blot), ruling out curvature-dependent helical preference as the operative mechanism
pendingconf 50%
IF DNAJB6 is knocked down ≥70% using siRNA in human iPSC-derived dopaminergic neurons for 7 days, THEN the rate of SNCA accumulation on disrupted vesicles will increase ≥2-fold as measured by cryo-EM vesicle morphology score and SNCA puncta density.
Predicted outcome: ≥2-fold increase in disrupted vesicle-associated SNCA puncta and ≥50% increase in cryo-EM scored morphologically disrupted vesicles per neuron
Falsification: No change in SNCA membrane association or vesicle morphology despite ≥70% DNAJB6 knockdown (confirmed by qPCR and western), indicating DNAJB6 does not cooperate with HSPA8 in SNCA membrane quality con

📖 References (2)

  1. High-density lipoprotein cholesterol as a therapeutic target for residual risk in patients with acute coronary syndrome.
    ["Ozaki et al.. PloS one (2018)
  2. LINC00261 elevation inhibits angiogenesis and cell cycle progression of pancreatic cancer cells by upregulating SCP2 via targeting FOXP3.
    ["Zou et al.. Journal of cellular and molecular medicine (2021)
Metadatasource: v1_phase_c_backfill · origin_type: debate_synthesizer
sourcev1_phase_c_backfill
origin_typedebate_synthesizer
_schema_version1
📊 Evidence Profile
Evidence Balance
+0%
Certainty
0%
Debates
0
Incoming
0
Outgoing
0
0 supporting 0 contradicting 0 neutral
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