G2019S has two separable effects: (1) increases catalytic efficiency at baseline (higher floor), AND (2) increases LRRK2 membrane affinity upon lysosomal stress, amplifying volume-sensing signals. These may be pharmacologically separable. Membrane-association mutants could distinguish these mechanisms.
The most supported model is that pathogenic G2019S shifts the basal catalytic set-point upward, producing higher baseline phospho-Rab output while leaving the core lysosomal volume-sensing response architecture largely intact. In this view, mutant cells begin from a higher activity floor, and the key experimental discriminator is whether baseline-normalized EC50, slope, or Emax materially increase during graded swelling.
Convergent vs Divergent Predictions
This summary checks where the selected hypotheses point toward the same target or mechanism, and where they pull in opposite directions.
LRRK2Lysosomalneurodegeneration
Convergent signals
LRRK2 recurs across 2 selected hypotheses with aligned directionality in lysosomal.
Divergent signals
No direct polarity conflicts detected among the selected hypotheses.
Verdict Summary
3/11
dimensions won
Dual-Mechanism Model: G2019S Increases B
9/11
dimensions won
G2019S primarily raises baseline LRRK2 k
Radar Chart — 10 Dimensions
Score Comparison Bars
Mechanistic
0.50
0.86
Evidence
0.55
0.32
Novelty
0.58
0.48
Feasibility
0.48
0.91
Impact
0.65
0.88
Druggability
0.42
0.93
Safety
0.60
0.67
Competition
0.68
0.72
Data
0.52
0.82
Reproducible
0.52
0.80
KG Connect
0.50
0.50
Score Breakdown
Dimension
Dual-Mechanism Model: G2019S I
G2019S primarily raises baseli
Mechanistic
0.500
0.860
Evidence
0.550
0.320
Novelty
0.580
0.480
Feasibility
0.480
0.910
Impact
0.650
0.880
Druggability
0.420
0.930
Safety
0.600
0.670
Competition
0.680
0.720
Data
0.520
0.820
Reproducible
0.520
0.800
KG Connect
0.500
0.500
Evidence
Dual-Mechanism Model: G2019S Increases Both Baseline AND Sig
Dual-Mechanism Model: G2019S Increases Both Baseli
4 rounds · quality: 0.80
Theorist
# Therapeutic/Mechanistic Hypotheses Addressing LRRK2 Signal Amplification vs. Baseline Elevation
---
## Hypothesis 1: G2019S Acts as a Lysosomal Volume-Sensing Amplifier via Enhanced RAB29-Dependen...
Skeptic
# Critical Evaluation of LRRK2 Hypotheses
## Overview
The core question—whether G2019S increases signal amplification during lysosomal swelling versus merely elevating the baseline activity floor—re...
Domain Expert
# Feasibility Assessment: LRRK2 G2019S Signal Amplification vs. Baseline Elevation Hypotheses
## Executive Summary
The core mechanistic question—whether LRRK2 G2019S drives pathology through amplifi...
1. **Title:** `G2019S raises the LRRK2 kinase floor more than the swelling gain`
**Mechanism:** G2019S may primarily increase constitutive catalytic output, producing higher baseline pRab10/pRa...
Skeptic
**Skeptical Read**
The main weakness across all six is the same: most cited evidence shows that mutant `LRRK2` can elevate phospho-Rab output or alter lysosomal remodeling, but it does **not** cleanl...
Domain Expert
As of **April 24, 2026**, the hypotheses that most credibly survive are:
1. **#1 Higher baseline kinase activity more than higher swelling gain**
2. **#4 Amplification is context-dependent and strong...
Synthesizer
{
"ranked_hypotheses": [
{
"title": "G2019S primarily raises baseline LRRK2 kinase activity rather than amplifying lysosomal swelling gain",
"description": "The most supported model ...