PPIL1 (Peptidylprolyl Isomerase Like 1): PPIL1 is a member of the cyclophilin enzyme family that catalyzes the cis-trans isomerization of proline bonds in proteins, facilitating protein folding and assembly. This activity supports essential cellular processes such as signal transduction, transcription regulation, and cell cycle control. PPIL1 helps maintain cellular homeostasis and stress response by participating in protein complexes and assisting in pre-mRNA splicing for accurate gene expression.