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Cation-π interactions in structural biology

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Gallivan, Justin P., Dougherty, Dennis A.·1999·Proceedings of the National Academy of Sciences

Abstract

Cation-π interactions in protein structures are identified and evaluated by using an energy-based criterion for selecting significant sidechain pairs. Cation-π interactions are found to be common among structures in the Protein Data Bank, and it is clearly demonstrated that, when a cationic sidechain (Lys or Arg) is near an aromatic sidechain (Phe, Tyr, or Trp), the geometry is biased toward one that would experience a favorable cation-π interaction. The sidechain of Arg is more likely than that of Lys to be in a cation-π interaction. Among the aromatics, a strong bias toward Trp is clear, such that over one-fourth of all tryptophans in the data bank experience an energetically significant cation-π interaction.

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Metadata

Authors
Gallivan, J. P., & Dougherty, D. A.
Venue
Proceedings of the National Academy of Sciences
Published
1999-08-17
Volume
96
Issue
17
Pages
9459-9464
ISSN
  • 0027-8424 (ISSN-L)
  • 1091-6490
OpenAlex
W2054525948
Cited by
1,997
References
0
FWCI
15.01
Type
journal article
Language
en
Open access
green

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CoChat. (2026). Citation check: Cation-π interactions in structural biology. https://app.cochat.ai/papers/10.1073/pnas.96.17.9459
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Gallivan, J. P., & Dougherty, D. A. (1999). Cation-π interactions in structural biology. Proceedings of the National Academy of Sciences. https://doi.org/10.1073/pnas.96.17.9459

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