PKA Inhibitor Substrate

PKA Inhibitor Substrate is a synthetic PKA/cAMP-dependent protein-kinase peptide. PKA is a basophilic Ser/Thr kinase commonly studied with short synthetic peptide substrates and inhibitor-derived sequences. Kemptide and PKI-derived peptides illustrate how basic residues around the phosphoacceptor strongly influence phosphorylation or inhibition. Defined PKA peptides are useful for activity, specificity, and inhibitor studies.

• PKA activity assays
• cAMP-dependent kinase substrate studies
• PKA inhibitor and regulatory-peptide research
• phosphorylation kinetics

The exact sequence, phosphorylation state, residue numbering, terminal modifications, labels, and species context should be matched to the intended assay. Sequence motifs support experimental interpretation but do not by themselves establish absolute enzyme specificity or native biological activity.

1. Synthetic peptide libraries and Kemptide phosphorylation by PKA
2. PKI-derived peptide substrates for PKA and PKG