PKA C-α (D38C6) Rabbit mAb #5842
- WB
- IP
Supporting Data
REACTIVITY | H M R Hm Mk |
SENSITIVITY | Endogenous |
MW (kDa) | 42 |
Source/Isotype | Rabbit IgG |
Application Key:
- WB-Western Blotting
- IP-Immunoprecipitation
Species Cross-Reactivity Key:
- H-Human
- M-Mouse
- R-Rat
- Hm-Hamster
- Mk-Monkey
Product Information
Product Usage Information
Application | Dilution |
---|---|
Western Blotting | 1:1000 |
Immunoprecipitation | 1:50 |
Storage
Protocol
Specificity / Sensitivity
Species Reactivity:
Source / Purification
Monoclonal antibody is produced by immunizing animals with a synthetic peptide corresponding to residues surrounding Ser326 of human PKA C-α protein.
Background
The second messenger cyclic AMP (cAMP) activates cAMP-dependent protein kinase (PKA or cAPK) in mammalian cells and controls many cellular mechanisms such as gene transcription, ion transport, and protein phosphorylation (1). Inactive PKA is a heterotetramer composed of a regulatory subunit (R) dimer and a catalytic subunit (C) dimer. In this inactive state, the pseudosubstrate sequences on the R subunits block the active sites on the C subunits. Three C subunit isoforms (C-α, C-β, and C-γ) and two families of regulatory subunits (RI and RII) with distinct cAMP binding properties have been identified. The two R families exist in two isoforms, α and β (RI-α, RI-β, RII-α, and RII-β). Upon binding of cAMP to the R subunits, the autoinhibitory contact is eased and active monomeric C subunits are released. PKA shares substrate specificity with Akt (PKB) and PKC, which are characterized by an arginine at position -3 relative to the phosphorylated serine or threonine residue (2). Substrates that present this consensus sequence and have been shown to be phosphorylated by PKA are Bad (Ser155), CREB (Ser133), and GSK-3 (GSK-3α Ser21 and GSK-3β Ser9) (3-5). In addition, combined knock-down of PKA C-α and -β blocks cAMP-mediated phosphorylation of Raf (Ser43 and Ser259) (6). Autophosphorylation and phosphorylation by PDK-1 are two known mechanisms responsible for phosphorylation of the C subunit at Thr197 (7).
- Montminy, M. (1997) Annu. Rev. Biochem. 66, 807-822.
- Dell'Acqua, M.L. and Scott, J.D. (1997) J. Biol. Chem. 272, 12881-12884.
- Tan, Y. et al. (2000) J. Biol. Chem. 275, 25865-25869.
- Gonzalez, G.A. and Montminy, M.R. (1989) Cell 59, 675-680.
- Fang, X. et al. (2000) Proc. Natl. Acad. Sci. USA 97, 11960-11965.
- Dumaz, N. and Marais, R. (2003) J. Biol. Chem. 278, 29819 -29823.
- Moore, M.J. et al. (2002) J. Biol. Chem. 277, 47878-47884.
Limited Uses
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