VhaSFD
D. melanogaster
Vacuolar H[+]-ATPase SFD subunit
What the model saw
Gene: VhaSFD Organism: Drosophila melanogaster Known functions: Vacuolar H[+]-ATPase SFD subunit. vacuolar H. proton-transporting ATPase activity, rotational mechanism.
View unredacted entry
Vacuolar H[+]-ATPase SFD subunit. vacuolar H. proton-transporting ATPase activity, rotational mechanism.
Solver output
VhaSFD encodes a subunit of the vacuolar H+-ATPase (V-ATPase), which acidifies lysosomes and endosomes via a rotational proton-pumping mechanism. Proper lysosomal acidification is essential for autophagosome-lysosome fusion and the degradative activity of lysosomal hydrolases, both of which are required for functional macroautophagy. Loss of V-ATPase activity impairs autophagic flux, leading to accumulation of damaged proteins and organelles—a hallmark of aging. Additionally, V-ATPase activity on the lysosomal membrane acts as a scaffold for mTORC1 activation in response to amino acid sensing; however, the dominant role in the context of aging is maintaining lysosomal function for proteostasis and autophagy. In Drosophila, reduced V-ATPase subunit expression has been shown to impair lysosomal degradation and shorten lifespan, supporting a pro-longevity role for normal VhaSFD function.
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 correctly predicted pro_longevity for VhaSFD. The mechanistic reasoning is sound: V-ATPase subunits are required for lysosomal acidification, which supports autophagy and proteostasis, and loss of function impairs these processes and shortens lifespan. The mechanism_class label "disabled_macroautophagy" is a bit misleading as a label (it describes what happens when the gene is lost, not the gene's normal function), but the underlying reasoning is correct. The model appropriately notes the mTORC1 connection as secondary. Confidence of 0.72 is reasonable. Overall a well-reasoned and correct prediction.
Raw API responses
solver
{
"reasoning": "VhaSFD encodes a subunit of the vacuolar H+-ATPase (V-ATPase), which acidifies lysosomes and endosomes via a rotational proton-pumping mechanism. Proper lysosomal acidification is essential for autophagosome-lysosome fusion and the degradative activity of lysosomal hydrolases, both of which are required for functional macroautophagy. Loss of V-ATPase activity impairs autophagic flux, leading to accumulation of damaged proteins and organelles—a hallmark of aging. Additionally, V-ATPase activity on the lysosomal membrane acts as a scaffold for mTORC1 activation in response to amino acid sensing; however, the dominant role in the context of aging is maintaining lysosomal function for proteostasis and autophagy. In Drosophila, reduced V-ATPase subunit expression has been shown to impair lysosomal degradation and shorten lifespan, supporting a pro-longevity role for normal VhaSFD function.",
"confidence": 0.72,
"key_pathways": [
"lysosomal acidification and autophagy",
"V-ATPase-dependent mTORC1 nutrient sensing",
"proteostasis via lysosomal degradation"
],
"mechanism_class": "disabled_macroautophagy",
"longevity_influence": "pro_longevity"
}advisor
{
"notes": "The model correctly predicted pro_longevity for VhaSFD. The mechanistic reasoning is sound: V-ATPase subunits are required for lysosomal acidification, which supports autophagy and proteostasis, and loss of function impairs these processes and shortens lifespan. The mechanism_class label \"disabled_macroautophagy\" is a bit misleading as a label (it describes what happens when the gene is lost, not the gene's normal function), but the underlying reasoning is correct. The model appropriately notes the mTORC1 connection as secondary. Confidence of 0.72 is reasonable. Overall a well-reasoned and correct prediction.",
"failure_mode": "correct",
"answer_correct": true,
"mechanism_correct": true,
"reasoning_quality": 4,
"ground_truth_questionable": false
}