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-Structure paper
タイトル | Structural and compositional diversity in the kainate receptor family. |
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ジャーナル・号・ページ | Cell Rep, Vol. 37, Issue 4, Page 109891, Year 2021 |
掲載日 | 2021年10月26日 |
著者 | Purushotham Selvakumar / Joon Lee / Nandish Khanra / Changhao He / Hermany Munguba / Lisa Kiese / Johannes Broichhagen / Andreas Reiner / Joshua Levitz / Joel R Meyerson / |
PubMed 要旨 | The kainate receptors (KARs) are members of the ionotropic glutamate receptor family and assemble into tetramers from a pool of five subunit types (GluK1-5). Each subunit confers distinct functional ...The kainate receptors (KARs) are members of the ionotropic glutamate receptor family and assemble into tetramers from a pool of five subunit types (GluK1-5). Each subunit confers distinct functional properties to a receptor, but the compositional and stoichiometric diversity of KAR tetramers is not well understood. To address this, we first solve the structure of the GluK1 homomer, which enables a systematic assessment of structural compatibility among KAR subunits. Next, we analyze single-cell RNA sequencing data, which reveal extreme diversity in the combinations of two or more KAR subunits co-expressed within the same cell. We then investigate the composition of individual receptor complexes using single-molecule fluorescence techniques and find that di-heteromers assembled from GluK1, GluK2, or GluK3 can form with all possible stoichiometries, while GluK1/K5, GluK2/K5, and GluK3/K5 can form 3:1 or 2:2 complexes. Finally, using three-color single-molecule imaging, we discover that KARs can form tri- and tetra-heteromers. |
リンク | Cell Rep / PubMed:34706237 / PubMed Central |
手法 | EM (単粒子) |
解像度 | 4.6 Å |
構造データ | EMDB-23542, PDB-7lvt: |
由来 |
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キーワード | MEMBRANE PROTEIN / ion channel / glutamate receptor / kainate receptor |