登録情報 データベース : EMDB / ID : EMD-31049 構造の表示 ダウンロードとリンクタイトル Cryo-EM structure of human GABA(B) receptor-Gi protein complex マップデータLocal refinement composite map of GABAB-Gi complex 詳細 試料複合体 : The GABAB-Gi1 complex複合体 : Guanine nucleotide-binding proteinタンパク質・ペプチド : Guanine nucleotide-binding protein G(i) subunit alpha-1タンパク質・ペプチド : Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1タンパク質・ペプチド : Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2複合体 : ScFv16複合体 : Gamma-aminobutyric acid type B receptorタンパク質・ペプチド : Gamma-aminobutyric acid type B receptor subunit 1タンパク質・ペプチド : Gamma-aminobutyric acid type B receptor subunit 2リガンド : baclofenリガンド : (3S)-5,7-ditert-butyl-3-oxidanyl-3-(trifluoromethyl)-1-benzofuran-2-one 詳細 キーワード GABAB / Cryo-EM / GPCR / Gi / MEMBRANE 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
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 / adenylate cyclase inhibitor activity / positive regulation of protein localization to cell cortex / T cell migration / Adenylate cyclase inhibitory pathway / D2 dopamine receptor binding / response to prostaglandin E / adenylate cyclase regulator activity / G protein-coupled serotonin receptor binding / adenylate cyclase-inhibiting serotonin receptor signaling pathway / cellular response to forskolin / regulation of mitotic spindle organization / dendritic shaft / response to nicotine / Regulation of insulin secretion / positive regulation of cholesterol biosynthetic process / negative regulation of insulin secretion / G protein-coupled receptor binding / response to peptide hormone / adenylate cyclase-inhibiting G protein-coupled receptor signaling pathway / mitochondrial membrane / GABA-ergic synapse / adenylate cyclase-modulating G protein-coupled receptor signaling pathway / centriolar satellite / G-protein beta/gamma-subunit complex binding / Schaffer collateral - CA1 synapse / Olfactory Signaling Pathway / Activation of the phototransduction cascade / G beta:gamma signalling through PLC beta / Presynaptic function of Kainate receptors / Thromboxane signalling through TP receptor / G protein-coupled acetylcholine receptor signaling pathway / G-protein activation / Activation of G protein gated Potassium channels / Inhibition of voltage gated Ca2+ channels via Gbeta/gamma subunits / Prostacyclin signalling through prostacyclin receptor / G beta:gamma signalling through CDC42 / Glucagon signaling in metabolic regulation / G beta:gamma signalling through BTK / Synthesis, secretion, and inactivation of Glucagon-like Peptide-1 (GLP-1) / ADP signalling through P2Y purinoceptor 12 / Sensory perception of sweet, bitter, and umami (glutamate) taste / photoreceptor disc membrane / Glucagon-type ligand receptors / osteoblast differentiation / Adrenaline,noradrenaline inhibits insulin secretion / Vasopressin regulates renal water homeostasis via Aquaporins / synaptic vesicle / GDP binding / G alpha (z) signalling events / Glucagon-like Peptide-1 (GLP1) regulates insulin secretion / ADP signalling through P2Y purinoceptor 1 / cellular response to catecholamine stimulus / ADORA2B mediated anti-inflammatory cytokines production / G beta:gamma signalling through PI3Kgamma / transmembrane signaling receptor activity / Cooperation of PDCL (PhLP1) and TRiC/CCT in G-protein beta folding / adenylate cyclase-activating dopamine receptor signaling pathway / GPER1 signaling / Inactivation, recovery and regulation of the phototransduction cascade / cellular response to prostaglandin E stimulus / G-protein beta-subunit binding / heterotrimeric G-protein complex / G alpha (12/13) signalling events / sensory perception of taste / extracellular vesicle / signaling receptor complex adaptor activity / Thrombin signalling through proteinase activated receptors (PARs) / retina development in camera-type eye / G protein activity / presynaptic membrane / GTPase binding / Ca2+ pathway / midbody / fibroblast proliferation / High laminar flow shear stress activates signaling by PIEZO1 and PECAM1:CDH5:KDR in endothelial cells / cell cortex / response to ethanol / G alpha (i) signalling events / G alpha (s) signalling events / phospholipase C-activating G protein-coupled receptor signaling pathway 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 / G-protein alpha subunit, group I / Receptor, ligand binding region / Receptor family ligand binding region / Periplasmic binding protein-like I / Guanine nucleotide binding protein (G-protein), alpha subunit / G protein alpha subunit, helical insertion / G-protein alpha subunit / G-alpha domain profile. / G protein alpha subunit / G-protein, gamma subunit / G-protein gamma subunit domain profile. / G-protein gamma-like domain / G-protein gamma-like domain superfamily / GGL domain / G protein gamma subunit-like motifs / GGL domain / G protein beta WD-40 repeat protein / Guanine nucleotide-binding protein, beta subunit / G-protein, beta subunit / G-protein beta WD-40 repeat / WD40 repeat, conserved site / Trp-Asp (WD) repeats signature. / Trp-Asp (WD) repeats profile. / Trp-Asp (WD) repeats circular profile. / WD40 repeats / WD40 repeat / WD40-repeat-containing domain superfamily / WD40/YVTN repeat-like-containing domain superfamily / P-loop containing nucleoside triphosphate hydrolase 類似検索 - ドメイン・相同性 Gamma-aminobutyric acid type B receptor subunit 2 / Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2 / Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1 / Guanine nucleotide-binding protein G(i) subunit alpha-1 / Gamma-aminobutyric acid type B receptor subunit 1 類似検索 - 構成要素生物種 Homo sapiens (ヒト) / synthetic construct (人工物) 手法 単粒子再構成法 / クライオ電子顕微鏡法 / 解像度 : 3.5 Å 詳細 データ登録者Shen C / Mao C 引用ジャーナル : Nature / 年 : 2021タイトル : Structural basis of GABA receptor-G protein coupling.著者 : Cangsong Shen / Chunyou Mao / Chanjuan Xu / Nan Jin / Huibing Zhang / Dan-Dan Shen / Qingya Shen / Xiaomei Wang / Tingjun Hou / Zhong Chen / Philippe Rondard / Jean-Philippe Pin / Yan Zhang / Jianfeng Liu / 要旨 : G-protein-coupled receptors (GPCRs) have central roles in intercellular communication. Structural studies have revealed how GPCRs can activate G proteins. However, whether this mechanism is ... G-protein-coupled receptors (GPCRs) have central roles in intercellular communication. Structural studies have revealed how GPCRs can activate G proteins. However, whether this mechanism is conserved among all classes of GPCR remains unknown. Here we report the structure of the class-C heterodimeric GABA receptor, which is activated by the inhibitory transmitter GABA, in its active form complexed with G protein. We found that a single G protein interacts with the GB2 subunit of the GABA receptor at a site that mainly involves intracellular loop 2 on the side of the transmembrane domain. This is in contrast to the G protein binding in a central cavity, as has been observed with other classes of GPCR. This binding mode results from the active form of the transmembrane domain of this GABA receptor being different from that of other GPCRs, as it shows no outside movement of transmembrane helix 6. Our work also provides details of the inter- and intra-subunit changes that link agonist binding to G-protein activation in this heterodimeric complex. 履歴 登録 2021年3月8日 - ヘッダ(付随情報) 公開 2021年5月5日 - マップ公開 2021年5月5日 - 更新 2024年10月23日 - 現状 2024年10月23日 処理サイト : PDBj / 状態 : 公開
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