Structures of the 5-HT 2A receptor in complex with the antipsychotics risperidone and zotepine

Kanako Terakado Kimura, Hidetsugu Asada, Asuka Inoue, Francois Marie Ngako Kadji, Dohyun Im, Chihiro Mori, Takatoshi Arakawa, Kunio Hirata, Yayoi Nomura, Norimichi Nomura, Junken Aoki, So Iwata, Tatsuro Shimamura

研究成果: Article査読

89 被引用数 (Scopus)

抄録

Many drugs target the serotonin 2A receptor (5-HT 2A R), including second-generation antipsychotics that also target the dopamine D 2 receptor (D 2 R). These drugs often produce severe side effects due to non-selective binding to other aminergic receptors. Here, we report the structures of human 5-HT 2A R in complex with the second-generation antipsychotics risperidone and zotepine. These antipsychotics effectively stabilize the inactive conformation by forming direct contacts with the residues at the bottom of the ligand-binding pocket, the movements of which are important for receptor activation. 5-HT 2A R is structurally similar to 5-HT 2C R but possesses a unique side-extended cavity near the orthosteric binding site. A docking study and mutagenic studies suggest that a highly 5-HT 2A R-selective antagonist binds the side-extended cavity. The conformation of the ligand-binding pocket in 5-HT 2A R significantly differs around extracellular loops 1 and 2 from that in D 2 R. These findings are beneficial for the rational design of safer antipsychotics and 5-HT 2A R-selective drugs.

本文言語English
ページ(範囲)121-128
ページ数8
ジャーナルNature Structural and Molecular Biology
26
2
DOI
出版ステータスPublished - 2019 2月 1

ASJC Scopus subject areas

  • 構造生物学
  • 分子生物学

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