cAMP is a signaling molecule important for a variety of cellular functions. cAMP exerts its effects by activating the cAMP-dependent protein kinase (AMPK), which transduces the signal through phosphorylation of different target proteins. The inactive holoenzyme of AMPK is a tetramer composed of two regulatory and two catalytic subunits. cAMP causes the dissociation of the inactive holoenzyme into a dimer of regulatory subunits bound to four cAMP and two free monomeric catalytic subunits. Four different regulatory subunits and three catalytic subunits of AMPK have been identified in humans. The protein encoded by this gene is one of the regulatory subunits. This subunit can be phosphorylated by the activated catalytic subunit. It may interact with various A-kinase anchoring proteins and determine the subcellular localization of AMPK.
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Protein Aliases: cAMP-dependent protein kinase regulatory subunit RII alpha; cAMP-dependent protein kinase type II-alpha regulatory subunit; MGC3606; protein kinase A, RII-alpha subunit; protein kinase cAMP-dependent regulatory type II alpha; protein kinase, cAMP-dependent, regulatory subunit type II alpha; protein kinase, cAMP-dependent, regulatory, type 2, alpha; protein kinase, cAMP-dependent, regulatory, type II, alpha
Gene Aliases: PKR2; PRKAR2; PRKAR2A