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The 2.6 Angstrom Crystal Structure of a Human A 2A Adenosine Receptor Bound to an Antagonist

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Jaakola, Veli-Pekka, Griffith, Mark T., Hanson, Michael A., Cherezov, Vadim, Chien, Ellen Y. T., Lane, J. Robert, IJzerman, Adriaan P., Stevens, Raymond C.·2008·Science

Abstract

The adenosine class of heterotrimeric guanine nucleotide–binding protein (G protein)–coupled receptors (GPCRs) mediates the important role of extracellular adenosine in many physiological processes and is antagonized by caffeine. We have determined the crystal structure of the human A 2A adenosine receptor, in complex with a high-affinity subtype-selective antagonist, ZM241385, to 2.6 angstrom resolution. Four disulfide bridges in the extracellular domain, combined with a subtle repacking of the transmembrane helices relative to the adrenergic and rhodopsin receptor structures, define a pocket distinct from that of other structurally determined GPCRs. The arrangement allows for the binding of the antagonist in an extended conformation, perpendicular to the membrane plane. The binding site highlights an integral role for the extracellular loops, together with the helical core, in ligand recognition by this class of GPCRs and suggests a role for ZM241385 in restricting the movement of a tryptophan residue important in the activation mechanism of the class A receptors.

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Metadata

Authors
Jaakola, V.-P., Griffith, M. T., Hanson, M. A., Cherezov, V., Chien, E. Y. T., Lane, J. R., IJzerman, A. P., & Stevens, R. C.
Venue
Science
Published
2008-11-21
Volume
322
Issue
5905
Pages
1211-1217
ISSN
  • 0036-8075 (ISSN-L)
  • 1095-9203
OpenAlex
W1975740938
Cited by
1,781
References
6
FWCI
78.91
Type
journal article
Language
en
Open access
green

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CoChat. (2026). Citation check: The 2.6 Angstrom Crystal Structure of a Human A 2A Adenosine Receptor Bound to an Antagonist. https://app.cochat.ai/papers/10.1126/science.1164772
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Jaakola, V.-P., Griffith, M. T., Hanson, M. A., Cherezov, V., Chien, E. Y. T., Lane, J. R., IJzerman, A. P., & Stevens, R. C. (2008). The 2.6 Angstrom Crystal Structure of a Human A 2A Adenosine Receptor Bound to an Antagonist. Science. https://doi.org/10.1126/science.1164772

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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.