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Updated: Jan 21, 2026
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Anionic Polymerization of an Amphiphilic Copolymer for Preparation of Block Copolymer Micelles Stabilized by π-π Stacking Interactions
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Nucleation of an Activating Conformational Change by a Cation-π Interaction
Per Rogne1, David Andersson1, Christin Grundström1
1Department of Chemistry , Umeå University , SE-901 87 Umeå , Sweden.
Biochemistry
|July 25, 2019
Summary
Researchers found a cation-π interaction between arginine and adenosine triphosphate (ATP) that is key to adenylate kinase function. This interaction not only recognizes ATP but also drives conformational changes for enzyme activation and specificity.
Area of Science:
- Biochemistry
- Enzymology
- Molecular Biology
Background:
- Adenosine triphosphate (ATP) is vital for numerous cellular processes, including energetics and metabolism.
- Adenylate kinase is an enzyme that utilizes ATP as a substrate.
Purpose of the Study:
- To investigate the molecular interactions between adenylate kinase and its substrate ATP.
- To elucidate the role of specific amino acid residues in ATP binding and enzyme function.
Main Methods:
- Structural analysis of the adenylate kinase-ATP complex.
- Investigation of cation-π interactions between arginine residues and ATP's aromatic moiety.
Main Results:
- A strong cation-π interaction was identified between an arginine side chain and the aromatic part of ATP.
- This interaction serves dual roles: nucleating conformational changes for ATP binding domain activation and influencing specificity in the AMP binding domain.
Conclusions:
- The cation-π interaction is crucial for both ATP recognition and the catalytic function of adenylate kinase.
- Understanding this interaction offers potential for novel enzyme design strategies.
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