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  • P5511 - Protein Kinase A from bovine heart

P5511 Sigma-Aldrich

Protein Kinase A from bovine heart

≥0.4 units/μg protein, lyophilized powder

Synonym: Protein Kinase, 3′,5′-cyclic-AMP-dependent from bovine heart



Related Categories 2.7.x.x Phosphorus containing groups, 2.x.x.x Transferases, Active Kinases, Application Index, Biochemicals and Reagents,
Quality Level   200
form   lyophilized powder
specific activity   ≥0.4 units/μg protein
composition   Protein, ≥70%
storage temp.   −20°C
Gene Information   cow ... PRKACA(282322), PRKACB(282323)


General description

Protein Kinase A (PKA) is a serine/threonine kinase, which exists as a tetrameric holoenzyme.


Protein Kinase A from bovine heart has been used to determine its activity using a molecular beacon probe. It has also been used to study the interaction of staurosporine with the ATP-binding site of kinases.

Protein Kinase A from bovine heart has been used to inhibit the phosphorylation of myosin.


1, 5 mg in glass bottle

Package size based on protein content

10 mg in poly bottle

Biochem/physiol Actions

Protein Kinase A (PKA) inhibits hormone-sensitive lipase translocation from cytosol to storage droplets and blocks lipolysis. It regulates apoptosis, mitochondrial respiration and ATP synthesis. PKA is modulated by protease calpain.

Many 3′,5′-cyclic AMP dependent protein kinases have been reported. Structural studies (Traugh, J.A., et al., Meth. Enzymol., 38, 290 [1974]) show the presence of at least two subunits, the regulatory subunit and the catalytic subunit. When both units are linked together, the catalytic activity is inhibited. However, when the cyclic-AMP binds to the regulatory subunit, the catalytic subunit is released and can then catalyze the transfer of phosphate from ATP to various proteins.

Unit Definition

One unit will transfer 1.0 picomole phosphate from γ-32P-ATP to hydrolyzed and partially dephosphorylated casein per min at pH 6.5 at 30 °C in the presence of cyclic AMP.

Physical form

Crude lyophilized powder containing EDTA and potassium phosphate, pH 7.5.

Preparation Note

Fractionated essentially by procedure of Gilman, A., Proc. Natl. Acad. Sci. USA, 67, 305 (1970).

Analysis Note

Protein determined by biuret.

Safety & Documentation

Safety Information

Personal Protective Equipment 
NONH for all modes of transport
WGK Germany 
Flash Point(F) 
Not applicable
Flash Point(C) 
Not applicable


Certificate of Analysis (COA)

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Certificate of Origin (COO)

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Protocols & Articles

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