Beta-1-syntrophin

Beta-1-syntrophin (SNTB1) is an adapter protein that organizes subcellular localization of membrane proteins, likely linking receptors to the actin cytoskeleton and the dystrophin glycoprotein complex (UniProt: Q13884). The protein functions at the intersection of cytoskeletal organization and membrane protein trafficking, key processes in neuronal structure and function.

In the context of Alzheimer's Disease, beta-1-syntrophin shows increased abundance in post-mortem AD brain tissue compared to age-matched controls. According to Chaparral AD proteomics data from TMT-labeled human brain analysis across four subcellular fractions (P2, P3, S2, S3), the protein is significantly up-regulated with a mean log2 fold-change of 0.78. This elevation may reflect compensatory cytoskeletal remodeling or alterations in membrane protein organization associated with AD pathology, though the biological significance requires further investigation.