登録情報 データベース : PDB / ID : 7c7q 構造の表示 ダウンロードとリンクタイトル Cryo-EM structure of the baclofen/BHFF-bound human GABA(B) receptor in active state 要素Gamma-aminobutyric acid type B receptor subunit 1 Gamma-aminobutyric acid type B receptor subunit 2 詳細キーワード MEMBRANE PROTEIN / GABAB / Cryo-EM / GPCR / active / PAM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
negative regulation of gamma-aminobutyric acid secretion / GABA B receptor activation / G protein-coupled GABA receptor complex / G protein-coupled neurotransmitter receptor activity involved in regulation of postsynaptic membrane potential / neuron-glial cell signaling / G protein-coupled neurotransmitter receptor activity involved in regulation of presynaptic membrane potential / negative regulation of dopamine secretion / G protein-coupled GABA receptor activity / G protein-coupled receptor heterodimeric complex / negative regulation of epinephrine secretion ... negative regulation of gamma-aminobutyric acid secretion / GABA B receptor activation / G protein-coupled GABA receptor complex / G protein-coupled neurotransmitter receptor activity involved in regulation of postsynaptic membrane potential / neuron-glial cell signaling / G protein-coupled neurotransmitter receptor activity involved in regulation of presynaptic membrane potential / negative regulation of dopamine secretion / G protein-coupled GABA receptor activity / G protein-coupled receptor heterodimeric complex / negative regulation of epinephrine secretion / positive regulation of growth hormone secretion / extracellular matrix protein binding / GABA receptor complex / negative regulation of adenylate cyclase activity / Class C/3 (Metabotropic glutamate/pheromone receptors) / negative regulation of synaptic transmission / positive regulation of glutamate secretion / gamma-aminobutyric acid signaling pathway / synaptic transmission, GABAergic / axolemma / dendritic shaft / response to nicotine / adenylate cyclase-inhibiting G protein-coupled receptor signaling pathway / mitochondrial membrane / GABA-ergic synapse / Schaffer collateral - CA1 synapse / Activation of G protein gated Potassium channels / Inhibition of voltage gated Ca2+ channels via Gbeta/gamma subunits / osteoblast differentiation / synaptic vesicle / transmembrane signaling receptor activity / presynaptic membrane / response to ethanol / G alpha (i) signalling events / chemical synaptic transmission / dendritic spine / postsynaptic membrane / neuron projection / G protein-coupled receptor signaling pathway / protein heterodimerization activity / negative regulation of cell population proliferation / neuronal cell body / endoplasmic reticulum membrane / glutamatergic synapse / extracellular space / plasma membrane / cytoplasm 類似検索 - 分子機能 GPCR family 3, gamma-aminobutyric acid receptor, type B2 / Gamma-aminobutyric acid type B receptor subunit 2, coiled-coil domain / Gamma-aminobutyric acid type B receptor subunit 2 coiled-coil domain / GPCR family 3, gamma-aminobutyric acid receptor, type B1 / GPCR family 3, GABA-B receptor / G-protein coupled receptors family 3 signature 3. / GPCR, family 3, conserved site / GPCR, family 3 / G-protein coupled receptors family 3 profile. / GPCR family 3, C-terminal ... GPCR family 3, gamma-aminobutyric acid receptor, type B2 / Gamma-aminobutyric acid type B receptor subunit 2, coiled-coil domain / Gamma-aminobutyric acid type B receptor subunit 2 coiled-coil domain / GPCR family 3, gamma-aminobutyric acid receptor, type B1 / GPCR family 3, GABA-B receptor / G-protein coupled receptors family 3 signature 3. / GPCR, family 3, conserved site / GPCR, family 3 / G-protein coupled receptors family 3 profile. / GPCR family 3, C-terminal / 7 transmembrane sweet-taste receptor of 3 GCPR / Sushi repeat (SCR repeat) / Domain abundant in complement control proteins; SUSHI repeat; short complement-like repeat (SCR) / Sushi/SCR/CCP domain / Sushi/CCP/SCR domain profile. / Sushi/SCR/CCP superfamily / Receptor, ligand binding region / Receptor family ligand binding region / Periplasmic binding protein-like I 類似検索 - ドメイン・相同性 baclofen / Chem-FN0 / Gamma-aminobutyric acid type B receptor subunit 2 / Gamma-aminobutyric acid type B receptor subunit 1 類似検索 - 構成要素生物種 Homo sapiens (ヒト)手法 電子顕微鏡法 / 単粒子再構成法 / クライオ電子顕微鏡法 / 解像度 : 3 Å 詳細データ登録者 Mao, C. / Shen, C. / Li, C. / Shen, D. / Xu, C. / Zhang, S. / Zhou, R. / Shen, Q. / Chen, L. / Jiang, Z. ...Mao, C. / Shen, C. / Li, C. / Shen, D. / Xu, C. / Zhang, S. / Zhou, R. / Shen, Q. / Chen, L. / Jiang, Z. / Liu, J. / Zhang, Y. 資金援助 中国, 2件 詳細 詳細を隠す組織 認可番号 国 National Natural Science Foundation of China (NSFC) 81922071 中国 Ministry of Science and Technology (MoST, China) 2018YFA0507003 中国
引用ジャーナル : Cell Res / 年 : 2020タイトル : Cryo-EM structures of inactive and active GABA receptor.著者 : Chunyou Mao / Cangsong Shen / Chuntao Li / Dan-Dan Shen / Chanjuan Xu / Shenglan Zhang / Rui Zhou / Qingya Shen / Li-Nan Chen / Zhinong Jiang / Jianfeng Liu / Yan Zhang / 要旨 : Metabotropic GABA G protein-coupled receptor functions as a mandatory heterodimer of GB1 and GB2 subunits and mediates inhibitory neurotransmission in the central nervous system. Each subunit is ... Metabotropic GABA G protein-coupled receptor functions as a mandatory heterodimer of GB1 and GB2 subunits and mediates inhibitory neurotransmission in the central nervous system. Each subunit is composed of the extracellular Venus flytrap (VFT) domain and transmembrane (TM) domain. Here we present cryo-EM structures of full-length human heterodimeric GABA receptor in the antagonist-bound inactive state and in the active state complexed with an agonist and a positive allosteric modulator in the presence of G protein at a resolution range of 2.8-3.0 Å. Our structures reveal that agonist binding stabilizes the closure of GB1 VFT, which in turn triggers a rearrangement of TM interfaces between the two subunits from TM3-TM5/TM3-TM5 in the inactive state to TM6/TM6 in the active state and finally induces the opening of intracellular loop 3 and synergistic shifting of TM3, 4 and 5 helices in GB2 TM domain to accommodate the α5-helix of G. We also observed that the positive allosteric modulator anchors at the dimeric interface of TM domains. These results provide a structural framework for understanding class C GPCR activation and a rational template for allosteric modulator design targeting the dimeric interface of GABA receptor. 履歴 登録 2020年5月26日 登録サイト : PDBJ / 処理サイト : PDBJ改定 1.0 2020年7月1日 Provider : repository / タイプ : Initial release改定 1.1 2020年7月22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_author.identifier_ORCID 改定 1.2 2020年7月29日 Group : Data collection / Derived calculations / Structure summaryカテゴリ : chem_comp / entity ... chem_comp / entity / pdbx_chem_comp_identifier / pdbx_entity_nonpoly / struct_conn / struct_site / struct_site_gen Item : _chem_comp.name / _entity.pdbx_description ... _chem_comp.name / _entity.pdbx_description / _pdbx_entity_nonpoly.name / _struct_conn.pdbx_role 解説 : Carbohydrate remediation / Provider : repository / タイプ : Remediation改定 1.3 2024年11月13日 Group : Data collection / Database references ... Data collection / Database references / Refinement description / Structure summary カテゴリ : chem_comp_atom / chem_comp_bond ... chem_comp_atom / chem_comp_bond / database_2 / em_3d_fitting_list / em_admin / pdbx_entry_details / pdbx_initial_refinement_model / pdbx_modification_feature Item : _database_2.pdbx_DOI / _database_2.pdbx_database_accession ... _database_2.pdbx_DOI / _database_2.pdbx_database_accession / _em_3d_fitting_list.accession_code / _em_3d_fitting_list.initial_refinement_model_id / _em_3d_fitting_list.source_name / _em_3d_fitting_list.type / _em_admin.last_update / _pdbx_entry_details.has_protein_modification
すべて表示 表示を減らす