PRKAR1B Proteins

Protein Information

The second messenger cyclic AMP (cAMP) mediates diverse cellular responses to external signals such as proliferation, ion transport, regulation of metabolism and gene transcription by activation of the cAMP-dependent protein kinase (cAPK or PKA). Activation of PKA occurs when cAMP binds to the two regulatory subunits of the tetrameric PKA holoenzyme resulting in release of active catalytic subunits. Three catalytic (C) subunits have been identified that each represent specific gene products. Activation of transcription upon elevation of cAMP levels results from translocation of PKA to the nucleus where it phosphorylates the transcrip- tion factor cAMP response element binding protein (CREB) on serine 133 which in turn leads to TFIIB binding to TATA-box-binding protein TBP1, thus linking phospho-CREB to the pol II transcription initiation complex.

Synonyms

AI385716; cAMP dependent protein kinase, subunit type 1 beta; cAMP dependent regulatory type I beta subunit transcript 2; cAMP dependent regulatory type I beta subunit transcript 3; cAMP dependent regulatory type I beta subunit transcript 4; cAMP-dependent protein kinase type I-beta regulatory subunit; PRKAR1; PRKAR1B; protein kinase cAMP-dependent type I regulatory subunit beta; protein kinase, cAMP dependent regulatory, type I beta; protein kinase, cAMP dependent regulatory, type I, beta; protein kinase, cAMP-dependent, regulatory subunit type I beta; protein kinase, cAMP-dependent, regulatory, type I, beta; RGD1563094; RIbeta