PPP1R17 (Protein Phosphatase 1 Regulatory Subunit 17): PPP1R17 is a protein that acts as a regulatory subunit of protein phosphatase 1 (PP1). PP1 is crucial for dephosphorylating target proteins and plays a vital role in cell signaling, metabolism, and cell cycle regulation. PPP1R17 helps regulate the activity and specificity of PP1, affecting various cellular processes.