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-Structure paper
タイトル | Structure of tetrameric forms of the serotonin-gated 5-HT3 receptor ion channel. |
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ジャーナル・号・ページ | EMBO J, Vol. 43, Issue 20, Page 4451-4471, Year 2024 |
掲載日 | 2024年9月4日 |
著者 | Bianca Introini / Wenqiang Cui / Xiaofeng Chu / Yingyi Zhang / Ana Catarina Alves / Luise Eckhardt-Strelau / Sabrina Golusik / Menno Tol / Horst Vogel / Shuguang Yuan / Mikhail Kudryashev / |
PubMed 要旨 | Multimeric membrane proteins are produced in the endoplasmic reticulum and transported to their target membranes which, for ion channels, is typically the plasma membrane. Despite the availability of ...Multimeric membrane proteins are produced in the endoplasmic reticulum and transported to their target membranes which, for ion channels, is typically the plasma membrane. Despite the availability of many fully assembled channel structures, our understanding of assembly intermediates, multimer assembly mechanisms, and potential functions of non-standard assemblies is limited. We demonstrate that the pentameric ligand-gated serotonin 5-HT3A receptor (5-HT3AR) can assemble to tetrameric forms and report the structures of the tetramers in plasma membranes of cell-derived microvesicles and in membrane memetics using cryo-electron microscopy and tomography. The tetrameric structures have near-symmetric transmembrane domains, and asymmetric extracellular domains, and can bind serotonin molecules. Computer simulations, based on our cryo-EM structures, were used to decipher the assembly pathway of pentameric 5-HT3R and suggest a potential functional role for the tetrameric receptors. |
リンク | EMBO J / PubMed:39232129 / PubMed Central |
手法 | EM (単粒子) / EM (サブトモグラム平均) |
解像度 | 3.5 - 25.2 Å |
構造データ | EMDB-16384, PDB-8c1w: EMDB-16385, PDB-8c1z: EMDB-16386, PDB-8c20: EMDB-16387, PDB-8c21: EMDB-19419: sub-tomogram averaging results of tetrameric 5-HT3A receptor on cell-derived vesicles EMDB-19420: Sub-tomogram averaging results of pentameric 5-HT3A receptor on cell-derived vesicles |
化合物 | ChemComp-SRO: |
由来 |
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キーワード | MEMBRANE PROTEIN / 5-HT3R / Serotonin / receptor / tetramer / ion channel / ion channel MEMBRANE PROTEIN |