登録情報 データベース : PDB / ID : 7awn 構造の表示 ダウンロードとリンクタイトル Structure of the thermostabilized EAAT1 cryst mutant in complex with rubidium and barium and the allosteric inhibitor UCPH101 要素Excitatory amino acid transporter 1,Neutral amino acid transporter B(0),Excitatory amino acid transporter 1 詳細 キーワード MEMBRANE PROTEIN / excitatory amino acid transporter 1 / human glutamate transporter / SLC1A3 / ion-coupling mechanism機能・相同性 機能・相同性情報分子機能 ドメイン・相同性 構成要素
Defective SLC1A3 causes episodic ataxia 6 (EA6) / Astrocytic Glutamate-Glutamine Uptake And Metabolism / membrane protein complex / neurotransmitter uptake / cranial nerve development / cell morphogenesis involved in neuron differentiation / glutamine secretion / gamma-aminobutyric acid biosynthetic process / L-glutamine import across plasma membrane / L-glutamine transmembrane transporter activity ... Defective SLC1A3 causes episodic ataxia 6 (EA6) / Astrocytic Glutamate-Glutamine Uptake And Metabolism / membrane protein complex / neurotransmitter uptake / cranial nerve development / cell morphogenesis involved in neuron differentiation / glutamine secretion / gamma-aminobutyric acid biosynthetic process / L-glutamine import across plasma membrane / L-glutamine transmembrane transporter activity / glutamine transport / L-serine transmembrane transporter activity / high-affinity L-glutamate transmembrane transporter activity / glutamate:sodium symporter activity / L-glutamate import / Transport of inorganic cations/anions and amino acids/oligopeptides / L-glutamate transmembrane transporter activity / L-glutamate transmembrane transport / D-aspartate import across plasma membrane / ligand-gated channel activity / neutral amino acid transport / L-aspartate transmembrane transporter activity / L-aspartate import across plasma membrane / Glutamate Neurotransmitter Release Cycle / auditory behavior / neutral L-amino acid transmembrane transporter activity / L-glutamate import across plasma membrane / amino acid transmembrane transporter activity / Amino acid transport across the plasma membrane / symporter activity / transepithelial transport / intracellular sodium ion homeostasis / cellular response to cocaine / antiporter activity / glutamate binding / neurotransmitter transport / amino acid transport / protein homotrimerization / RHOJ GTPase cycle / RHOQ GTPase cycle / neuromuscular process controlling balance / RHOH GTPase cycle / response to light stimulus / RAC3 GTPase cycle / positive regulation of synaptic transmission / transport across blood-brain barrier / monoatomic ion transport / potassium ion transmembrane transport / RAC1 GTPase cycle / chloride transmembrane transport / erythrocyte differentiation / basal plasma membrane / sensory perception of sound / response to wounding / centriolar satellite / melanosome / signaling receptor activity / virus receptor activity / cytoplasmic vesicle / chemical synaptic transmission / neuron projection / ciliary basal body / response to xenobiotic stimulus / response to antibiotic / neuronal cell body / synapse / perinuclear region of cytoplasm / cell surface / extracellular exosome / metal ion binding / membrane / plasma membrane 類似検索 - 分子機能 Proton glutamate symport protein / Sodium:dicarboxylate symporter / : / Sodium:dicarboxylate symporter family signature 2. / Sodium:dicarboxylate symporter / Sodium:dicarboxylate symporter, conserved site / Sodium:dicarboxylate symporter superfamily / Sodium:dicarboxylate symporter family / Sodium:dicarboxylate symporter family signature 1. / Orthogonal Bundle / Mainly Alpha 類似検索 - ドメイン・相同性 Chem-6Z6 / : / RUBIDIUM ION / Excitatory amino acid transporter 1 / Neutral amino acid transporter B(0) 類似検索 - 構成要素生物種 Homo sapiens (ヒト)手法 X線回折 / シンクロトロン / 分子置換 / 解像度 : 3.92 Å 詳細データ登録者 Canul-Tec, J.C. / Legrand, P. / Reyes, N. 資金援助 フランス, 1件 詳細 詳細を隠す組織 認可番号 国 European Research Council (ERC) 309657 フランス
引用ジャーナル : EMBO J / 年 : 2022タイトル : The ion-coupling mechanism of human excitatory amino acid transporters.著者 : Juan C Canul-Tec / Anand Kumar / Jonathan Dhenin / Reda Assal / Pierre Legrand / Martial Rey / Julia Chamot-Rooke / Nicolas Reyes / 要旨 : Excitatory amino acid transporters (EAATs) maintain glutamate gradients in the brain essential for neurotransmission and to prevent neuronal death. They use ionic gradients as energy source and co- ... Excitatory amino acid transporters (EAATs) maintain glutamate gradients in the brain essential for neurotransmission and to prevent neuronal death. They use ionic gradients as energy source and co-transport transmitter into the cytoplasm with Na and H , while counter-transporting K to re-initiate the transport cycle. However, the molecular mechanisms underlying ion-coupled transport remain incompletely understood. Here, we present 3D X-ray crystallographic and cryo-EM structures, as well as thermodynamic analysis of human EAAT1 in different ion bound conformations, including elusive counter-transport ion bound states. Binding energies of Na and H , and unexpectedly Ca , are coupled to neurotransmitter binding. Ca competes for a conserved Na site, suggesting a regulatory role for Ca in glutamate transport at the synapse, while H binds to a conserved glutamate residue stabilizing substrate occlusion. The counter-transported ion binding site overlaps with that of glutamate, revealing the K -based mechanism to exclude the transmitter during the transport cycle and to prevent its neurotoxic release on the extracellular side. 履歴 登録 2020年11月8日 登録サイト : PDBE / 処理サイト : PDBE改定 1.0 2021年10月13日 Provider : repository / タイプ : Initial release改定 1.1 2021年12月1日 Group : Database references / カテゴリ : citation / citation_authorItem : _citation.country / _citation.journal_abbrev ... _citation.country / _citation.journal_abbrev / _citation.journal_id_ASTM / _citation.journal_id_CSD / _citation.journal_id_ISSN / _citation.page_first / _citation.page_last / _citation.pdbx_database_id_DOI / _citation.pdbx_database_id_PubMed / _citation.title / _citation.year 改定 1.2 2022年1月12日 Group : Database references / カテゴリ : citation / citation_authorItem : _citation.journal_volume / _citation.page_first ... _citation.journal_volume / _citation.page_first / _citation.page_last / _citation.year / _citation_author.identifier_ORCID 改定 1.3 2022年1月19日 Group : Database references / カテゴリ : citation / citation_authorItem : _citation.page_first / _citation.page_last / _citation_author.identifier_ORCID改定 1.4 2024年1月31日 Group : Data collection / Refinement descriptionカテゴリ : chem_comp_atom / chem_comp_bond / pdbx_initial_refinement_model
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