Isoform 1 of Sorting nexin-12

Sorting nexin-12 (SNX12) isoform 1 is a small protein of 172 amino acids involved in membrane trafficking and subcellular transport processes (UniProt: Q9UMY4-1). SNX12 belongs to the sorting nexin family, which regulates protein sorting and endosomal dynamics. The protein functions in intracellular vesicle transport pathways essential for normal cellular homeostasis.

SNX12 has been examined in the context of Alzheimer's Disease using post-mortem human brain tissue from AD patients compared to age-matched controls. A TMT-labeled proteomics study analyzing four subcellular fractions (P2, P3, S2, S3) detected SNX12 across two fractions. However, the direction of protein abundance change in AD brain tissue remains ambiguous, with a mean log2 fold-change of 0.0066 (Chaparral AD proteomics). This minimal change suggests no robust or consistent dysregulation of SNX12 across the examined subcellular compartments in AD pathology.

The ambiguous direction and near-zero fold-change indicate that SNX12 may not be a primary target of AD-associated proteomic changes, though its role in vesicle trafficking leaves open the possibility of context-dependent involvement in neurodegeneration.