The active site substrate specificity of protein kinase C

Young Guen Kwon, Marianne Mendelow, David S. Lawrence

Research output: Contribution to journalArticlepeer-review

25 Citations (Scopus)

Abstract

The active site substrate specificity of protein kinase C (PKC) has been evaluated. Like the cAMP-dependent protein kinase (PKA), PKC will efficiently phosphorylate achiral residues attached to an active site-directed peptide. In contrast, PKC exhibits behavior that is dramatically different from PKA with respect to the phosphorylation of α-substituted alcohols. Although PKA will only phosphorylate residues that contain the same stereochemistry as that found in L-serine, PKC will phosphorylate α-configurational isomers that correspond to both the L- and D-stereoisomers. The possible structural basis for the 'dual specificity' of PKC is explored. In an analogous vein, although β-substituted alcohols that serve as PKA substrates must contain the same stereochemistry as that present in L-threonine, PKC will phosphorylate configurational isomers which correspond to both L-threonine and L-allo-threonine. The implications of these observations with respect to protein kinase inhibitor design are discussed.

Original languageEnglish
Pages (from-to)4839-4844
Number of pages6
JournalJournal of Biological Chemistry
Volume269
Issue number7
Publication statusPublished - 1994 Feb 18

All Science Journal Classification (ASJC) codes

  • Biochemistry
  • Molecular Biology
  • Cell Biology

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