3-(2-Naphthylthio)propionic acid (CAS 1141-45-3)

3-(2-Naphthylthio)propionic acid (NPA) has garnered significant attention in scientific research due to its distinctive characteristics. As a thiol-containing compound, 3-(2-Naphthylthio)propionic acid bears structural resemblance to cysteine, an essential amino acid vital for protein synthesis. 3-(2-Naphthylthio)propionic acid finds broad application in scientific research endeavors, encompassing investigations into protein structure and function AND exploration of redox signaling pathways. Notably, 3-(2-Naphthylthio)propionic acid acts as a potent inhibitor of protein disulfide isomerase (PDI), an enzyme for protein folding and quality control. By impeding PDI′s activity, 3-(2-Naphthylthio)propionic acid disrupts proper protein folding, leading to endoplasmic reticulum (ER) stress and potential cell death. Additionally, 3-(2-Naphthylthio)propionic acid exhibits modulation of redox signaling pathways by regulating the functioning of glutathione peroxidase and thioredoxin reductase. The primary mechanism of action for 3-(2-Naphthylthio)propionic acid lies in its ability to inhibit PDI. By binding to PDI′s active site, 3-(2-Naphthylthio)propionic acid hinders the enzyme′s catalytic function. Consequently, misfolded proteins accumulate in the ER, prompting the unfolded protein response (UPR) and culminating in cell death.