SNX31 is a sorting nexin family protein involved in endocytic protein trafficking and recycling. As a member of the SNX-FERM subfamily, SNX31 possesses a FERM domain that facilitates endocytic transport and lysosomal degradation pathways 1. The protein binds phosphatidylinositol and functions in early endosome dynamics and intracellular protein transport [GO annotations]. SNX31 has emerged as a disease-relevant gene across multiple pathologies. In melanoma, SNX31 was identified as a novel driver mutation gene through permutation-based analysis of exome sequencing data 2. Notably, SNX31 has been implicated in nigrostriatal iron accumulation, a hallmark of neurodegeneration; transcriptome-wide association studies identified SNX31 as a putatively causal gene linked to brain iron homeostasis, potentially through coordination with metal ion transport pathways 3. SNX31 was also prioritized as a hub gene in vascular dementia pathogenesis through integrated WGCNA and machine learning analysis, though its expression changes showed inconsistent significance in validation studies 4. Additionally, SNX31 has been associated with schizophrenia risk in 22q11.2 deletion carriers 5, cognitive function in Hispanic/Latino populations 6, and prenatal lead exposure-associated DNA methylation changes 7. These findings suggest SNX31 contributes to multiple disease mechanisms, though its specific pathogenic mechanisms require further mechanistic investigation.