Normally RAB29 recruits LRRK2 specifically to stressed lysosomes for localized RAB10 phosphorylation. G2019S increases kinase activity even in cytosolic/untargeted LRRK2, creating diffuse RAB10 phosphorylation that disrupts normal endosomal trafficking. RAB29 overexpression rescuing G2019S phenotypes suggests spatial control not completely uncoupled.
G2019S specifically hyperactivates LRRK2 when recruited to swelling lysosomes via RAB29, creating pathogenic positive feedback where membrane stress increases RAB10 phosphorylation more than wild-type. Key experimental prediction: rise kinetics (slope) should differ between G2019S and WT, not merely baseline offset. RAB29 pathogenic mutations (PARK23) confirm disease relevance of this axis.
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.
LRRK2 recurs across 2 selected hypotheses with aligned directionality in lysosomal, unspecified mechanism.
RAB29 recurs across 2 selected hypotheses with aligned directionality in lysosomal, unspecified mechanism.
Divergent signals
No direct polarity conflicts detected among the selected hypotheses.
Verdict Summary
3/11
dimensions won
LRRK2 G2019S Uncouples RAB29-Dependent S
9/11
dimensions won
G2019S Acts as Lysosomal Volume-Sensing
Radar Chart — 10 Dimensions
Score Comparison Bars
Mechanistic
0.65
0.68
Evidence
0.62
0.72
Novelty
0.85
0.78
Feasibility
0.58
0.82
Impact
0.68
0.85
Druggability
0.45
0.70
Safety
0.62
0.72
Competition
0.78
0.65
Data
0.55
0.68
Reproducible
0.62
0.70
KG Connect
0.50
0.50
Score Breakdown
Dimension
LRRK2 G2019S Uncouples RAB29-D
G2019S Acts as Lysosomal Volum
Mechanistic
0.650
0.680
Evidence
0.620
0.720
Novelty
0.850
0.780
Feasibility
0.580
0.820
Impact
0.680
0.850
Druggability
0.450
0.700
Safety
0.620
0.720
Competition
0.780
0.650
Data
0.550
0.680
Reproducible
0.620
0.700
KG Connect
0.500
0.500
Evidence
LRRK2 G2019S Uncouples RAB29-Dependent Spatial Control from
No evidence citations yet
G2019S Acts as Lysosomal Volume-Sensing Amplifier via Enhanc
No evidence citations yet
Debate Excerpts
LRRK2 G2019S Uncouples RAB29-Dependent Spatial Con
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...
# 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...