Protein Kinase A regulatory subunit I beta Antibody

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, designated Cα , Cβ and Cγ , that each represent specific gene products. Cα and Cβ are closely related (93% amino acid sequence similari- ty), whereas Cγ displays 83% and 79% similarity to Cα and Cβ , respectively. 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.

This Protein Kinase A regulatory subunit I beta antibody is generated from rabbits immunized with a KLH conjugated synthetic peptide between 50-80 amino acids from the N-terminal region of human Protein Kinase A regulatory subunit I beta.

Store at 4˚ C for three months and -20˚ C, stable for up to one year. As with all antibodies care should be taken to avoid repeated freeze thaw cycles. Antibodies should not be exposed to prolonged high temperatures.