National Natural Science Foundation of China (NSFC)
32071202
中国
National Natural Science Foundation of China (NSFC)
32100129
中国
引用
ジャーナル: EMBO J / 年: 2024 タイトル: Structural insights into the molecular effects of the anthelmintics monepantel and betaine on the Caenorhabditis elegans acetylcholine receptor ACR-23. 著者: Fenglian Liu / Tianyu Li / Huihui Gong / Fei Tian / Yan Bai / Haowei Wang / Chonglin Yang / Yang Li / Fei Guo / Sheng Liu / Qingfeng Chen / 要旨: Anthelmintics are drugs used for controlling pathogenic helminths in animals and plants. The natural compound betaine and the recently developed synthetic compound monepantel are both anthelmintics ...Anthelmintics are drugs used for controlling pathogenic helminths in animals and plants. The natural compound betaine and the recently developed synthetic compound monepantel are both anthelmintics that target the acetylcholine receptor ACR-23 and its homologs in nematodes. Here, we present cryo-electron microscopy structures of ACR-23 in apo, betaine-bound, and betaine- and monepantel-bound states. We show that ACR-23 forms a homo-pentameric channel, similar to some other pentameric ligand-gated ion channels (pLGICs). While betaine molecules are bound to the classical neurotransmitter sites in the inter-subunit interfaces in the extracellular domain, monepantel molecules are bound to allosteric sites formed in the inter-subunit interfaces in the transmembrane domain of the receptor. Although the pore remains closed in betaine-bound state, monepantel binding results in an open channel by wedging into the cleft between the transmembrane domains of two neighboring subunits, which causes dilation of the ion conduction pore. By combining structural analyses with site-directed mutagenesis, electrophysiology and in vivo locomotion assays, we provide insights into the mechanism of action of the anthelmintics monepantel and betaine.
名称: Betaine receptor acr-23,Soluble cytochrome b562 / タイプ: protein_or_peptide / ID: 1 詳細: Residues 387-500 correspond to the bril expression tag. Residues 599-603 and 610-612 correspond to flexible linkers, residues 604-609 correspond to the thrombin cleavage site, and residues ...詳細: Residues 387-500 correspond to the bril expression tag. Residues 599-603 and 610-612 correspond to flexible linkers, residues 604-609 correspond to the thrombin cleavage site, and residues 613-620 correspond to the strep ll tag. コピー数: 5 / 光学異性体: LEVO