Structure of the human histamine H1 receptor complex with doxepin.
Structure of the human histamine H1 receptor complex with doxepin.
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DOI:
10.1038/nature10236
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发表时间:
2011-06-22
期刊:
影响因子:
64.8
通讯作者:
Iwata, So
中科院分区:
文献类型:
--
作者:
Shimamura, Tatsuro;Shiroishi, Mitsunori;Weyand, Simone;Tsujimoto, Hirokazu;Winter, Graeme;Katritch, Vsevolod;Abagyan, Ruben;Cherezov, Vadim;Liu, Wei;Han, Gye Won;Kobayashi, Takuya;Stevens, Raymond C.;Iwata, So
The biogenic amine histamine is an important pharmacological mediator involved in pathophysiological processes such as allergies and inflammations. Histamine-H1 receptor (H1R) antagonists are very effective drugs alleviating the symptoms of allergic reactions. Here we show the crystal structure of H1R complex with doxepin, a first-generation H1R-antagonist. Doxepin sits deep in the ligand binding pocket and directly interacts with the highly conserved Trp4286.48, a key residue in GPCR activation. This well-conserved pocket with mostly hydrophobic nature contributes to low selectivity of the first-generation compounds. The pocket is associated with an anion-binding region occupied by a phosphate ion. Docking of various second-generation H1R-antagonists reveals that the unique carboxyl-group present in this class of compounds interacts with Lys1915.39 and/or Lys179ECL2, both of which form part of the anion-binding region. This region is not conserved in other aminergic receptors defining how minor differences in receptor lead to pronounced selectivity differences with small molecules.
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DOI:
10.1107/s0907444905036693
发表时间:
2006-01-01
影响因子:
2.2
作者:
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通讯作者:
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影响因子:
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