cAMP-dependent Protein Kinase (PKA)

cAMP-dependent Protein Kinase, commonly known as PKA, is an enzyme that plays a crucial role in cellular signaling. It is activated by a molecule called cyclic AMP (cAMP), which acts as a messenger in response to various hormones and signals. When PKA is activated, it helps regulate numerous cellular activities by adding phosphate groups to specific proteins, altering their function. This process can influence metabolism, gene expression, and cell growth, making PKA essential for many biological processes, including the response to stress and the regulation of energy production in cells.