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Updated: May 17, 2026
08:05
Assaying Protein Kinase Activity with Radiolabeled ATP
Published on: May 26, 2017
Structural analysis of ATP analogues compatible with kinase-catalyzed labeling
Sujit Suwal1, Chamara Senevirathne, Satish Garre
1Department of Chemistry, Wayne State University, Detroit, MI 48202, USA.
Bioconjugate Chemistry
|November 3, 2012
Summary
Kinases can utilize modified ATP analogues for protein phosphorylation, a key cellular process. Understanding the structural needs of these analogues allows for the development of new tools for biochemical research.
Area of Science:
- Biochemistry
- Molecular Biology
- Chemical Biology
Background:
- Protein phosphorylation is a critical cellular signaling mechanism regulated by kinases.
- Kinases are enzymes that catalyze the transfer of a phosphate group from ATP to proteins.
- Modified ATP analogues can serve as alternative substrates for kinases, expanding their utility in research.
Purpose of the Study:
- To investigate the structural requirements of gamma-modified ATP analogues for kinase compatibility.
- To explore how linker length and composition influence the efficiency of kinase-catalyzed labeling.
- To enable the rational design of novel ATP analogues for diverse kinase-catalyzed labeling applications.
Main Methods:
- Synthesis of a series of gamma-modified ATP analogues with varying linker characteristics.
- Quantitative mass spectrometry to determine the efficiency of kinase-catalyzed labeling with the synthesized analogues.
- Analysis of structure-activity relationships to identify key features for kinase cosubstrate acceptance.
Main Results:
- Demonstrated that kinases exhibit promiscuity towards certain gamma-modified ATP analogues.
- Identified specific structural features, including linker length and composition, that impact kinase cosubstrate efficiency.
- Established a quantitative method for assessing the performance of ATP analogues in kinase-catalyzed reactions.
Conclusions:
- Kinase cosubstrate promiscuity can be modulated by the structural properties of ATP analogues.
- This study provides insights into designing effective ATP analogues for specific kinase labeling applications.
- The findings facilitate the development of tailored chemical biology tools for studying kinase function.
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