"η6"-Type anion-π in biomolecular recognition
Suvobrata Chakravarty1, Zi-Zhang Sheng, Bradley Iverson
1Department of Chemistry and Biochemistry, South Dakota State University, Brookings, SD 57007, USA. suvobrata.chakravarty@sdstate.edu
FEBS Letters
|October 24, 2012
Summary
Anion-π interactions, where anions bind to aromatic rings, are identified in biomolecular structures. These interactions are crucial for protein and nucleic acid folding and function.
Area of Science:
- Biochemistry
- Structural Biology
- Chemical Physics
Background:
- Theoretical and experimental evidence suggests attractive interactions between anions and aromatic π systems (anion-π).
- These interactions, specifically the η(6)-type anion-π, may be significant in biomolecular structure formation and recognition.
Purpose of the Study:
- To investigate the occurrence and significance of η(6)-type anion-π interactions in high-resolution protein and nucleic acid structures.
Main Methods:
- Analysis of high-resolution structural data of proteins and nucleic acids.
- Identification and characterization of η(6)-type anion-π interactions within these structures.
Main Results:
- The η(6)-type anion-π interaction was unambiguously observed in protein and nucleic acid structures.
- These interactions were found in loops and often involved conserved or coevolving sites in proteins.
Conclusions:
- The η(6)-type anion-π interaction, while less common than cation-π, plays a role in macromolecular folding and function.
- Its presence in conserved sites suggests functional importance in biological systems.
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