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-Structure paper
タイトル | Structural insights into the allosteric inhibition of P2X4 receptors. |
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ジャーナル・号・ページ | Nat Commun, Vol. 14, Issue 1, Page 6437, Year 2023 |
掲載日 | 2023年10月13日 |
著者 | Cheng Shen / Yuqing Zhang / Wenwen Cui / Yimeng Zhao / Danqi Sheng / Xinyu Teng / Miaoqing Shao / Muneyoshi Ichikawa / Jin Wang / Motoyuki Hattori / |
PubMed 要旨 | P2X receptors are ATP-activated cation channels, and the P2X4 subtype plays important roles in the immune system and the central nervous system, particularly in neuropathic pain. Therefore, P2X4 ...P2X receptors are ATP-activated cation channels, and the P2X4 subtype plays important roles in the immune system and the central nervous system, particularly in neuropathic pain. Therefore, P2X4 receptors are of increasing interest as potential drug targets. Here, we report the cryo-EM structures of the zebrafish P2X4 receptor in complex with two P2X4 subtype-specific antagonists, BX430 and BAY-1797. Both antagonists bind to the same allosteric site located at the subunit interface at the top of the extracellular domain. Structure-based mutational analysis by electrophysiology identified the important residues for the allosteric inhibition of both zebrafish and human P2X4 receptors. Structural comparison revealed the ligand-dependent structural rearrangement of the binding pocket to stabilize the binding of allosteric modulators, which in turn would prevent the structural changes of the extracellular domain associated with channel activation. Furthermore, comparison with the previously reported P2X structures of other subtypes provided mechanistic insights into subtype-specific allosteric inhibition. |
リンク | Nat Commun / PubMed:37833294 / PubMed Central |
手法 | EM (単粒子) |
解像度 | 3.23 - 3.43 Å |
構造データ | EMDB-36668, PDB-8jv5: EMDB-36669, PDB-8jv6: |
化合物 | ChemComp-P73: ChemComp-NAG: ChemComp-P6E: |
由来 |
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キーワード | TRANSPORT PROTEIN / ATP / allosteric modulator / channel |