Eif5a2
M. musculus
eukaryotic translation initiation factor 5A2
What the model saw
Gene: Eif5a2 Organism: Mus musculus Known functions: eukaryotic translation initiation factor 5A2. eukaryotic translation initiation factor 5A-2. RNA binding. ribosome binding. translation elongation factor activity.
View unredacted entry
eukaryotic translation initiation factor 5A2. eukaryotic translation initiation factor 5A-2. RNA binding. ribosome binding. translation elongation factor activity.
Solver output
EIF5A2 is a paralog of EIF5A1 and functions as a translation elongation factor (despite its "initiation factor" name), facilitating ribosome transit through polyproline and other stalling sequences via its unique hypusine modification. EIF5A2 is the oncogenic, stress-inducible paralog that promotes global translational output and is frequently overexpressed in tumors. Enhanced translational activity driven by EIF5A2 is mechanistically linked to mTORC1-driven anabolic signaling, a key nutrient-sensing axis whose attenuation is strongly pro-longevity across model organisms. Upregulation of EIF5A2 increases protein synthesis rates, which opposes the translational repression associated with lifespan extension (e.g., via rapamycin or dietary restriction). Additionally, EIF5A2 overexpression promotes cellular proliferation and suppresses autophagy-related translation programs, further aligning it with anti-longevity outcomes. Loss-of-function of the EIF5A pathway (including hypusination inhibition) has been shown to extend lifespan in yeast and other models, supporting that EIF5A2 activity is net anti-longevity.
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 predicts anti_longevity for Eif5a2. However, the mechanistic reasoning has significant issues. The model classifies the mechanism as "deregulated_nutrient_sensing" and heavily emphasizes mTORC1 signaling as the primary link, which is speculative and indirect. EIF5A2 is primarily known as an oncogene whose overexpression promotes tumor growth and cellular proliferation - the anti-longevity effect in mice is most likely through cancer promotion rather than nutrient sensing per se. The model also conflates EIF5A2 with EIF5A1 biology (hypusine modification, lifespan extension in yeast), when EIF5A2 is the oncogenic paralog with distinct expression patterns. The claim that "loss-of-function of the EIF5A pathway extends lifespan in yeast" is being used to support EIF5A2 being anti-longevity, but this reasoning is somewhat circular and imprecise. The core reasoning that enhanced translation/proliferation is anti-longevity is directionally correct but the specific mechanistic framing (mTORC1-driven nutrient sensing) is not well-supported for this specific gene. The answer is correct but the mechanism classification and detailed reasoning contain inaccuracies and speculative connections.
Raw API responses
solver
{
"reasoning": "EIF5A2 is a paralog of EIF5A1 and functions as a translation elongation factor (despite its \"initiation factor\" name), facilitating ribosome transit through polyproline and other stalling sequences via its unique hypusine modification. EIF5A2 is the oncogenic, stress-inducible paralog that promotes global translational output and is frequently overexpressed in tumors. Enhanced translational activity driven by EIF5A2 is mechanistically linked to mTORC1-driven anabolic signaling, a key nutrient-sensing axis whose attenuation is strongly pro-longevity across model organisms. Upregulation of EIF5A2 increases protein synthesis rates, which opposes the translational repression associated with lifespan extension (e.g., via rapamycin or dietary restriction). Additionally, EIF5A2 overexpression promotes cellular proliferation and suppresses autophagy-related translation programs, further aligning it with anti-longevity outcomes. Loss-of-function of the EIF5A pathway (including hypusination inhibition) has been shown to extend lifespan in yeast and other models, supporting that EIF5A2 activity is net anti-longevity.",
"confidence": 0.65,
"key_pathways": [
"mTORC1-driven translational regulation",
"hypusine-dependent translation elongation",
"ribosome-mediated protein synthesis"
],
"mechanism_class": "deregulated_nutrient_sensing",
"longevity_influence": "anti_longevity"
}advisor
{
"notes": "The model correctly predicts anti_longevity for Eif5a2. However, the mechanistic reasoning has significant issues. The model classifies the mechanism as \"deregulated_nutrient_sensing\" and heavily emphasizes mTORC1 signaling as the primary link, which is speculative and indirect. EIF5A2 is primarily known as an oncogene whose overexpression promotes tumor growth and cellular proliferation - the anti-longevity effect in mice is most likely through cancer promotion rather than nutrient sensing per se. The model also conflates EIF5A2 with EIF5A1 biology (hypusine modification, lifespan extension in yeast), when EIF5A2 is the oncogenic paralog with distinct expression patterns. The claim that \"loss-of-function of the EIF5A pathway extends lifespan in yeast\" is being used to support EIF5A2 being anti-longevity, but this reasoning is somewhat circular and imprecise. The core reasoning that enhanced translation/proliferation is anti-longevity is directionally correct but the specific mechanistic framing (mTORC1-driven nutrient sensing) is not well-supported for this specific gene. The answer is correct but the mechanism classification and detailed reasoning contain inaccuracies and speculative connections.",
"failure_mode": "right_answer_wrong_reasoning",
"answer_correct": true,
"mechanism_correct": false,
"reasoning_quality": 3,
"ground_truth_questionable": false
}