A protein phosphatase 1 specific <i>phos</i>phatase <i>ta</i>rgeting <i>p</i>eptide (PhosTAP) to identify the PP1 phosphatome.

ABSTRACT: Phosphoprotein phosphatases (PPPs) are the key serine/threonine phosphatases that regulate all essential signaling cascades. In particular, Protein Phosphatase 1 (PP1) dephosphorylates ~80% of all ser/thr phosphorylation sites. Here, we developed a phosphatase targeting peptide (PhosTAP) that binds all PP1 isoforms and does so with a stronger affinity than any other known PP1 regulator. This PhosTAP can be used as a PP1 recruitment tool for Phosphorylation Targeting Chimera (PhosTAC)-type recruitment in in vitro and cellular experiments, as well as in phosphoproteomics experiments to identify PP1-specific substrates and phosphosites. The latter is especially important to further our understanding of cellular signaling, as the identification of substrates and especially phosphosites that ar

SUBMITTER: Choy MS 

PROVIDER: S-EPMC11536154 | biostudies-literature | 2024 Oct

REPOSITORIES: biostudies-literature