arx-4
C. elegans
putative actin-related protein 2/3 complex subunit 2
What the model saw
Gene: arx-4 Organism: Caenorhabditis elegans Known functions: putative actin-related protein 2/3 complex subunit 2. actin filament binding. molecular adaptor activity.
View unredacted entry
putative actin-related protein 2/3 complex subunit 2. actin filament binding. molecular adaptor activity.
Solver output
arx-4 encodes a putative subunit of the Arp2/3 complex (specifically the p34/ARPC2 subunit), which nucleates branched actin filament networks critical for cell motility, endocytosis, and intracellular vesicle trafficking. While actin cytoskeleton dynamics are important for many cellular processes, the direct link between Arp2/3 complex activity and longevity in C. elegans is not well established. The molecular adaptor activity suggests roles in scaffolding signaling complexes, but it is unclear whether this promotes or opposes aging. Arp2/3-mediated actin branching could influence autophagy (via actin-dependent autophagosome formation) or intercellular communication (via exosome/vesicle secretion), but the net effect on lifespan is ambiguous without direct experimental evidence. The function is too pleiotropic and insufficiently specific to confidently assign a pro- or anti-longevity role.
GenAge curators classify each gene's normal function as promoting (Pro-Longevity) or opposing (Anti-Longevity) longevity, based on synthesis across studies. Loss-of-function effects can vary from this depending on the manipulation.
Advisor judgment
The model predicted "unclear" while the ground truth is "pro_longevity." The model's reasoning about the Arp2/3 complex and actin cytoskeleton dynamics is mechanistically plausible and shows good biological knowledge, but it failed to commit to a direction. The model correctly identified the gene's function (Arp2/3 complex subunit) and considered relevant pathways like autophagy and vesicle trafficking, but concluded the evidence was too ambiguous to assign a direction. This is a case of appropriate uncertainty given limited direct evidence, but the answer is still wrong. The mechanism class of "altered_intercellular_communication" is a reasonable guess but not confirmed as the correct mechanism. The confidence of 0.35 reflects genuine uncertainty, which is somewhat appropriate given the obscurity of this gene's longevity role, but the model still missed the correct answer.
Raw API responses
solver
{
"reasoning": "arx-4 encodes a putative subunit of the Arp2/3 complex (specifically the p34/ARPC2 subunit), which nucleates branched actin filament networks critical for cell motility, endocytosis, and intracellular vesicle trafficking. While actin cytoskeleton dynamics are important for many cellular processes, the direct link between Arp2/3 complex activity and longevity in C. elegans is not well established. The molecular adaptor activity suggests roles in scaffolding signaling complexes, but it is unclear whether this promotes or opposes aging. Arp2/3-mediated actin branching could influence autophagy (via actin-dependent autophagosome formation) or intercellular communication (via exosome/vesicle secretion), but the net effect on lifespan is ambiguous without direct experimental evidence. The function is too pleiotropic and insufficiently specific to confidently assign a pro- or anti-longevity role.",
"confidence": 0.35,
"key_pathways": [
"Arp2/3 complex-mediated actin nucleation",
"endocytic vesicle trafficking",
"actin cytoskeleton remodeling"
],
"mechanism_class": "altered_intercellular_communication",
"longevity_influence": "unclear"
}advisor
{
"notes": "The model predicted \"unclear\" while the ground truth is \"pro_longevity.\" The model's reasoning about the Arp2/3 complex and actin cytoskeleton dynamics is mechanistically plausible and shows good biological knowledge, but it failed to commit to a direction. The model correctly identified the gene's function (Arp2/3 complex subunit) and considered relevant pathways like autophagy and vesicle trafficking, but concluded the evidence was too ambiguous to assign a direction. This is a case of appropriate uncertainty given limited direct evidence, but the answer is still wrong. The mechanism class of \"altered_intercellular_communication\" is a reasonable guess but not confirmed as the correct mechanism. The confidence of 0.35 reflects genuine uncertainty, which is somewhat appropriate given the obscurity of this gene's longevity role, but the model still missed the correct answer.",
"failure_mode": "appropriately_uncertain",
"answer_correct": false,
"mechanism_correct": false,
"reasoning_quality": 3,
"ground_truth_questionable": false
}