PKC (19-36)

PKC (19-36) is a synthetic peptide fragment derived from the regulatory domain of protein kinase C (PKC), a pivotal serine/threonine kinase involved in numerous cellular signaling pathways. As a cell-permeable peptide corresponding to amino acid residues 19 through 36 of PKC, it functions primarily as a pseudosubstrate inhibitor, mimicking the autoinhibitory region of the enzyme. This molecular tool is highly valued in biochemical and cell signaling research for its ability to modulate PKC activity with high specificity. Due to its defined sequence and mechanism of action, PKC (19-36) has become an essential reagent for dissecting the roles of PKC isoforms in diverse physiological and pathological processes.

Signal Transduction Research: PKC (19-36) is widely utilized in studies investigating signal transduction pathways regulated by PKC. By competitively inhibiting the kinase's substrate binding site, this peptide facilitates precise interrogation of PKC-dependent phosphorylation events. Researchers leverage its inhibitory properties to delineate the contribution of PKC activity to downstream effectors, such as MAPK, NF-κB, and other signaling cascades, thereby unraveling complex cellular communication networks.

Enzyme Kinetics and Mechanistic Studies: As a pseudosubstrate inhibitor, the peptide serves as a valuable tool in kinetic analyses of PKC isoforms. Its defined interaction with the catalytic core allows for controlled inhibition, enabling detailed mechanistic studies of substrate recognition, allosteric regulation, and conformational dynamics. These insights are critical for understanding the molecular basis of PKC activation and for benchmarking the efficacy of novel small-molecule inhibitors.

Cellular Function Analysis: In cell-based assays, PKC (19-36) is employed to transiently suppress PKC activity, thereby permitting functional studies of processes such as cell proliferation, differentiation, migration, and apoptosis. By selectively modulating PKC signaling, researchers can attribute specific cellular phenotypes or responses to PKC-dependent mechanisms, supporting the elucidation of its roles in development, immune function, and stress responses.

Drug Discovery and Screening: The peptide is instrumental in pharmacological screening platforms aimed at identifying and characterizing new PKC modulators. Its well-characterized inhibitory profile provides a robust reference for validating assay sensitivity and specificity. Furthermore, it assists in distinguishing direct PKC inhibitors from compounds affecting upstream or parallel pathways, streamlining lead compound identification and optimization.

Peptide-Protein Interaction Studies: PKC (19-36) is also used to probe protein-protein interactions involving the PKC regulatory domain. By mimicking the natural autoinhibitory sequence, it can disrupt or compete with endogenous binding partners, enabling mapping of interaction interfaces and the identification of novel PKC-associated proteins. Such studies advance understanding of the spatial and temporal regulation of PKC within the cellular environment and support the development of targeted modulators for research applications.

1. Effect of Short-Term Desiccation, Recovery Time, and CAPA-PVK Neuropeptide on the Immune System of the Burying Beetle Nicrophorus vespilloides

2. Autoinhibition and phosphorylation-induced activation of phospholipase C-γ isozymes

3. Cell-based adhesion assays for isolation of snake venom’s integrin antagonists

4. Characterization of Novel P-Selectin Targeted Complement Inhibitors in Murine Models of Hindlimb Injury and Transplantation

5. Relatedness of antibodies to peptides containing homocitrulline or citrulline in patients with rheumatoid arthritis