<P>Signal transduction studies have indicated that Akt is essential for transducing the signals originating from extracellular stimuli. An exploration of the Akt signal transduction mechanism depends on the ability to assay its activation states...
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https://www.riss.kr/link?id=A107689320
2005
-
SCOPUS,SCIE
학술저널
3765-3772(8쪽)
0
상세조회0
다운로드다국어 초록 (Multilingual Abstract)
<P>Signal transduction studies have indicated that Akt is essential for transducing the signals originating from extracellular stimuli. An exploration of the Akt signal transduction mechanism depends on the ability to assay its activation states...
<P>Signal transduction studies have indicated that Akt is essential for transducing the signals originating from extracellular stimuli. An exploration of the Akt signal transduction mechanism depends on the ability to assay its activation states by determining the ability of Akt to phosphorylate various substrates. This paper describes a CE-based kinase assay for Akt using a UV detection method. The RPRAATF peptide was used as the specific substrate to determine the Akt activity. Under the CE separation conditions used, the phosphorylated and nonphosphorylated forms of the RPRAATF peptide were rapidly resolved in the Akt reaction mixture within 20 min. Using this method for measuring the Akt activity, the incubation time for the Akt reactions as well as the kinetic parameters (K<SUB>M</SUB>) were examined. Furthermore, the developed method was applied to a PC12 cell system to assess the dynamics of the Akt activity by examining the effectiveness of the RPRAATF peptide substrate under various cytokine-stimulated environments. These results highlight the feasibility of the CE method, which is a simple and reliable technique for determining and characterizing various enzyme reactions particularly kinase enzymes.</P>