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Cation-π Interactions in Chemistry and Biology: A New View of Benzene, Phe, Tyr, and Trp

Dougherty, Dennis A.·1996·Science

Abstract

Cations bind to the π face of an aromatic structure through a surprisingly strong, noncovalent force termed the cation-π interaction. The magnitude and generality of the effect have been established by gas-phase measurements and by studies of model receptors in aqueous media. To first order, the interaction can be considered an electrostatic attraction between a positive charge and the quadrupole moment of the aromatic. A great deal of direct and circumstantial evidence indicates that cation-π interactions are important in a variety of proteins that bind cationic ligands or substrates. In this context, the amino acids phenylalanine (Phe), tyrosine (Tyr), and tryptophan (Trp) can be viewed as polar, yet hydrophobic, residues.

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Metadata

Authors
Dougherty, D. A.
Venue
Science
Published
1996-01-12
Volume
271
Issue
5246
Pages
163-168
ISSN
  • 0036-8075 (ISSN-L)
  • 1095-9203
OpenAlex
W2079604571
Cited by
2,656
References
0
FWCI
95.93
Type
journal article
Language
en
Open access
closed

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CoChat. (2026). Citation check: Cation-π Interactions in Chemistry and Biology: A New View of Benzene, Phe, Tyr, and Trp. https://app.cochat.ai/papers/10.1126/science.271.5246.163
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Dougherty, D. A. (1996). Cation-π Interactions in Chemistry and Biology: A New View of Benzene, Phe, Tyr, and Trp. Science. https://doi.org/10.1126/science.271.5246.163

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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).

Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.