Protein Kinase C

**Definition:** An serine-threonine protein kinase that requires the presence of physiological concentrations of CALCIUM and membrane PHOSPHOLIPIDS. The additional presence of DIACYLGLYCEROLS markedly increases its sensitivity to both calcium and phospholipids. The sensitivity of the enzyme can also be increased by PHORBOL ESTERS and it is believed that protein kinase C is the receptor protein of tumor-promoting phorbol esters.

**Tree numbers:** - D08.811.913.696.620.682.700.725 - D12.776.476.563.725

**Synonyms:** - Calcium-Activated Phospholipid-Dependent Kinase - Calcium Phospholipid-Dependent Protein Kinase - Phospholipid-Sensitive Calcium-Dependent Protein Kinase - PKC Serine-Threonine Kinase