Effects of cAMP-Dependent, Calmodulin-Dependent, and C-Type Protein Kinases on Platelet Calcium Transport

  • William L. Dean
  • Samuel Evans Adunyah
Part of the GWUMC Department of Biochemistry Annual Spring Symposia book series (GWUN)


Cyclic AMP (cAMP) and Ca2+ are interrelated intracellular messengers known to modify cellular function through specific protein kinases (Cohen, 1982). In platelets, increases in cAMP inhibit platelet activation, an effect that is reversed by inhibitors of adenylate cyclase (Salzman, 1972; Chianget al., 1975), while Ca2+ is involved in activation rather than inhibition of platelet function (Detwileret al., 1978). In addition to cAMP-and calmodulindependent protein kinases, a third kinase is intimately involved in platelet activation—protein kinase C (Kishimotoet al., 1980). This kinase is activated by diacylglycerol, a product of phospholipase C—mediated hydrolysis of phosphatidylinositol.


ATPase Activity Human Platelet Dependent Protein Kinase Platelet Membrane Internal Membrane 
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Copyright information

© Plenum Press, New York 1989

Authors and Affiliations

  • William L. Dean
    • 1
  • Samuel Evans Adunyah
    • 1
  1. 1.Department of BiochemistryUniversity of Louisville School of MedicineLouisvilleUSA

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