{"type": "root", "children": [{"type": "p", "children": [{"type": "t", "text": "\n ENOPH1 – which encodes the bifunctional enzyme enolase‐phosphatase E1 – plays multifaceted roles in cellular metabolism and disease. Structural and biochemical studies have demonstrated that ENOPH1 is a key catalytic component of the methionine salvage pathway, where it mediates the conversion of 2,3‐diketo‐5‑methylthio‑1‑phosphopentane into aci‐reductone (in a reaction that requires Mg²⁺), thereby linking l‑methionine biosynthesis and polyamine metabolism ["}, {"type": "fg", "children": [{"type": "fg_f", "ref": "1"}]}, {"type": "t", "text": "]. In addition, genome‐wide and candidate gene analyses have implicated ENOPH1 in the regulation of neurobehavioral traits; differential expression patterns and genetic prioritization studies have singled out ENOPH1 as a promising candidate gene associated with anxiety and depression, possibly through its contribution to polyamine biosynthesis and the modulation of brain spermidine levels ["}, {"type": "fg", "children": [{"type": "fg_f", "ref": "2"}]}, {"type": "t", "text": "]."}]}, {"type": "t", "text": "\n \n "}, {"type": "p", "children": [{"type": "t", "text": "\n In oncology, investigations in glioma have uncovered a prominent role for ENOPH1 as a pro‐tumorigenic mediator. Elevated ENOPH1 expression in high‐grade gliomas promotes cell proliferation and migration by activating the PI3K/AKT/mTOR signaling axis (via regulation of THEM4), while siRNA‐mediated knockdown of ENOPH1 in glioma cell lines attenuates both tumor growth and migratory capacity ["}, {"type": "fg", "children": [{"type": "fg_f", "ref": "3"}]}, {"type": "t", "text": "]."}]}, {"type": "t", "text": "\n \n "}, {"type": "p", "children": [{"type": "t", "text": "\n Beyond its metabolic and oncogenic functions, disruptions of the genomic region encompassing ENOPH1 (4q21) have been linked to developmental and neuropsychiatric disorders. Multiple studies on 4q21 microdeletion and microduplication syndromes have identified ENOPH1 among a cluster of genes whose haploinsufficiency correlates with intellectual disability, developmental delay, and distinct facial dysmorphisms, supporting a role for ENOPH1 in normal neurodevelopment ["}, {"type": "fg", "children": [{"type": "fg_f", "ref": "5"}]}, {"type": "t", "text": "]. Moreover, gene expression profiling in osteosarcoma has highlighted ENOPH1 as part of a key gene panel capable of predicting patient survival, suggesting its utility as a prognostic biomarker in malignancies beyond glioma ["}, {"type": "fg", "children": [{"type": "fg_f", "ref": "6"}]}, {"type": "t", "text": "].\n "}]}, {"type": "t", "text": "\n \n "}, {"type": "p", "children": [{"type": "t", "text": "\n ENOPH1 has also emerged in studies of host–pathogen interactions; for instance, proteomic profiling in CHIKV‐infected mosquito cells identified enolase‐phosphatase e‑1 as one of several host factors that modulate viral infection, implying that ENOPH1 may influence cellular stress responses and the outcome of infectious processes ["}, {"type": "fg", "children": [{"type": "fg_f", "ref": "7"}]}, {"type": "t", "text": "]. Finally, its inclusion in co‑expression modules associated with pediatric sepsis further underscores a potential role in broader stress‐ and inflammation‐responsive pathways ["}, {"type": "fg", "children": [{"type": "fg_f", "ref": "8"}]}, {"type": "t", "text": "].\n "}]}, {"type": "t", "text": "\n \n "}, {"type": "p", "children": [{"type": "t", "text": "\n Together, these findings reveal that ENOPH1 is not only central to methionine and polyamine metabolism through its well‐defined enzymatic function but also contributes to diverse physiological and pathological processes including neurobehavioral regulation, tumor progression, developmental disorders, and the cellular stress response.\n "}]}, {"type": "rg", "children": [{"type": "r", "ref": 1, "children": [{"type": "t", "text": "Hui Wang, Hai Pang, Mark Bartlam, et al. 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