登録情報 データベース : PDB / ID : 7awq 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-E386Q mutant in complex with L-ASP, sodium ions 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 / TRANSPORT PROTEIN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) / auditory behavior / Astrocytic Glutamate-Glutamine Uptake And Metabolism / membrane protein complex / glutamine secretion / neurotransmitter uptake / L-glutamine import across plasma membrane / cranial nerve development / cell morphogenesis involved in neuron differentiation / glutamine transport ... Defective SLC1A3 causes episodic ataxia 6 (EA6) / auditory behavior / Astrocytic Glutamate-Glutamine Uptake And Metabolism / membrane protein complex / glutamine secretion / neurotransmitter uptake / L-glutamine import across plasma membrane / cranial nerve development / cell morphogenesis involved in neuron differentiation / glutamine transport / L-glutamine transmembrane transporter activity / L-serine transmembrane transporter activity / gamma-aminobutyric acid biosynthetic process / high-affinity L-glutamate transmembrane transporter activity / glutamate:sodium symporter activity / L-glutamate import / ligand-gated channel activity / Transport of inorganic cations/anions and amino acids/oligopeptides / L-glutamate transmembrane transport / L-glutamate transmembrane transporter activity / neutral amino acid transport / D-aspartate import across plasma membrane / amino acid transmembrane transporter activity / L-aspartate transmembrane transporter activity / Amino acid transport across the plasma membrane / L-aspartate import across plasma membrane / neutral L-amino acid transmembrane transporter activity / Glutamate Neurotransmitter Release Cycle / L-glutamate import across plasma membrane / symporter activity / transepithelial transport / intracellular sodium ion homeostasis / neurotransmitter transport / antiporter activity / cellular response to cocaine / glutamate binding / amino acid transport / RHOJ GTPase cycle / RHOQ GTPase cycle / protein homotrimerization / RHOH GTPase cycle / neuromuscular process controlling balance / transport across blood-brain barrier / response to light stimulus / RAC3 GTPase cycle / positive regulation of synaptic transmission / monoatomic ion transport / potassium ion transmembrane transport / chloride transmembrane transport / RAC1 GTPase cycle / erythrocyte differentiation / basal plasma membrane / sensory perception of sound / response to wounding / melanosome / virus receptor activity / signaling receptor activity / cytoplasmic vesicle / chemical synaptic transmission / response to xenobiotic stimulus / neuron projection / response to antibiotic / neuronal cell body / synapse / perinuclear region of cytoplasm / cell surface / extracellular exosome / membrane / metal ion binding / plasma membrane 類似検索 - 分子機能 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. 類似検索 - ドメイン・相同性 Chem-6Z6 / ASPARTIC ACID / : / 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 : 3.65 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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