PIN1 (肽基脯氨酰异构酶)

PIN1 is a peptidyl-prolyl isomerase (PPIase) that specifically recognizes the pSer/Thr-Pro motif, catalyzes the cis and trans isomerization of the proline amide bond, changes the conformation of the substrate protein, thereby affecting its function, stability or intracellular localization. PIN1 regulates cell cycle proteins such as cyclin D, cyclin E, and CDC25, thereby regulating the G1-S process and mitotic progression. PIN1 regulates the stability of proteins such as p53 and p73, responds to stress signals such as DNA damage, and thus affects cell cycle arrest or apoptosis. PIN1 regulates the phosphorylation of tau protein, mediating the neurological functions. PIN1 regulates transcription factors such as NF-κB and JUN, mediates immune responses. PIN1 dysfunction could lead to Alzheimer's disease, cancer, asthma, or microbial infection^[1][2].