+データを開く
-基本情報
登録情報 | データベース: PDB / ID: 8wg8 | ||||||||||||||||||||||||
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タイトル | Cryo-EM structures of peptide free and Gs-coupled GCGR | ||||||||||||||||||||||||
要素 |
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キーワード | MEMBRANE PROTEIN / G protein-coupled receptor / ligand recognition / receptor activation / unimolecular agonist | ||||||||||||||||||||||||
機能・相同性 | 機能・相同性情報 regulation of glycogen metabolic process / glucagon receptor activity / G-protein activation / Activation of the phototransduction cascade / Glucagon-type ligand receptors / Thromboxane signalling through TP receptor / Sensory perception of sweet, bitter, and umami (glutamate) taste / G beta:gamma signalling through PI3Kgamma / G beta:gamma signalling through CDC42 / Cooperation of PDCL (PhLP1) and TRiC/CCT in G-protein beta folding ...regulation of glycogen metabolic process / glucagon receptor activity / G-protein activation / Activation of the phototransduction cascade / Glucagon-type ligand receptors / Thromboxane signalling through TP receptor / Sensory perception of sweet, bitter, and umami (glutamate) taste / G beta:gamma signalling through PI3Kgamma / G beta:gamma signalling through CDC42 / Cooperation of PDCL (PhLP1) and TRiC/CCT in G-protein beta folding / Activation of G protein gated Potassium channels / Inhibition of voltage gated Ca2+ channels via Gbeta/gamma subunits / Ca2+ pathway / G alpha (z) signalling events / Vasopressin regulates renal water homeostasis via Aquaporins / Glucagon-like Peptide-1 (GLP1) regulates insulin secretion / Adrenaline,noradrenaline inhibits insulin secretion / ADP signalling through P2Y purinoceptor 12 / G alpha (q) signalling events / Thrombin signalling through proteinase activated receptors (PARs) / Activation of G protein gated Potassium channels / G-protein activation / G beta:gamma signalling through PI3Kgamma / Prostacyclin signalling through prostacyclin receptor / G beta:gamma signalling through PLC beta / ADP signalling through P2Y purinoceptor 1 / Thromboxane signalling through TP receptor / Presynaptic function of Kainate receptors / G beta:gamma signalling through CDC42 / Inhibition of voltage gated Ca2+ channels via Gbeta/gamma subunits / Glucagon-type ligand receptors / G alpha (i) signalling events / G alpha (12/13) signalling events / G beta:gamma signalling through BTK / ADP signalling through P2Y purinoceptor 12 / Adrenaline,noradrenaline inhibits insulin secretion / alkylglycerophosphoethanolamine phosphodiesterase activity / Cooperation of PDCL (PhLP1) and TRiC/CCT in G-protein beta folding / Thrombin signalling through proteinase activated receptors (PARs) / Ca2+ pathway / Extra-nuclear estrogen signaling / G alpha (z) signalling events / G alpha (s) signalling events / G alpha (q) signalling events / photoreceptor outer segment membrane / G alpha (i) signalling events / Glucagon-like Peptide-1 (GLP1) regulates insulin secretion / spectrin binding / Vasopressin regulates renal water homeostasis via Aquaporins / response to starvation / exocytosis / peptide hormone binding / photoreceptor outer segment / cardiac muscle cell apoptotic process / cellular response to glucagon stimulus / hormone-mediated signaling pathway / cellular response to starvation / photoreceptor inner segment / response to nutrient / guanyl-nucleotide exchange factor activity / generation of precursor metabolites and energy / adenylate cyclase-modulating G protein-coupled receptor signaling pathway / adenylate cyclase-activating G protein-coupled receptor signaling pathway / Glucagon signaling in metabolic regulation / regulation of blood pressure / Glucagon-type ligand receptors / cellular response to catecholamine stimulus / sensory perception of taste / adenylate cyclase-activating dopamine receptor signaling pathway / cellular response to prostaglandin E stimulus / G-protein beta-subunit binding / heterotrimeric G-protein complex / signaling receptor complex adaptor activity / GTPase binding / glucose homeostasis / retina development in camera-type eye / phospholipase C-activating G protein-coupled receptor signaling pathway / positive regulation of cytosolic calcium ion concentration / cellular response to hypoxia / cell body / G alpha (s) signalling events / G alpha (q) signalling events / cell population proliferation / cell surface receptor signaling pathway / endosome / G protein-coupled receptor signaling pathway / GTPase activity / dendrite / synapse / protein-containing complex binding / positive regulation of gene expression / membrane / plasma membrane / cytoplasm 類似検索 - 分子機能 | ||||||||||||||||||||||||
生物種 | Homo sapiens (ヒト) Rattus norvegicus (ドブネズミ) Bos taurus (ウシ) synthetic construct (人工物) Spodoptera frugiperda (ツマジロクサヨトウ) | ||||||||||||||||||||||||
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: 2.71 Å | ||||||||||||||||||||||||
データ登録者 | Cong, Z.T. / Zhao, F.H. / Li, Y. / Luo, G. / Zhou, Q.T. / Yang, D.H. / Wang, M.W. | ||||||||||||||||||||||||
資金援助 | 中国, 7件
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引用 | ジャーナル: Cell Discov / 年: 2024 タイトル: Molecular features of the ligand-free GLP-1R, GCGR and GIPR in complex with G proteins. 著者: Zhaotong Cong / Fenghui Zhao / Yang Li / Gan Luo / Yiting Mai / Xianyue Chen / Yanyan Chen / Shi Lin / Xiaoqing Cai / Qingtong Zhou / Dehua Yang / Ming-Wei Wang / 要旨: Class B1 G protein-coupled receptors (GPCRs) are important regulators of many physiological functions such as glucose homeostasis, which is mainly mediated by three peptide hormones, i.e., glucagon- ...Class B1 G protein-coupled receptors (GPCRs) are important regulators of many physiological functions such as glucose homeostasis, which is mainly mediated by three peptide hormones, i.e., glucagon-like peptide-1 (GLP-1), glucagon (GCG), and glucose-dependent insulinotropic polypeptide (GIP). They trigger a cascade of signaling events leading to the formation of an active agonist-receptor-G protein complex. However, intracellular signal transducers can also activate the receptor independent of extracellular stimuli, suggesting an intrinsic role of G proteins in this process. Here, we report cryo-electron microscopy structures of the human GLP-1 receptor (GLP-1R), GCG receptor (GCGR), and GIP receptor (GIPR) in complex with G proteins without the presence of cognate ligands. These ligand-free complexes share a similar intracellular architecture to those bound by endogenous peptides, in which, the G protein alone directly opens the intracellular binding cavity and rewires the extracellular orthosteric pocket to stabilize the receptor in a state unseen before. While the peptide-binding site is partially occupied by the inward folded transmembrane helix 6 (TM6)-extracellular loop 3 (ECL3) juncture of GIPR or a segment of GCGR ECL2, the extracellular portion of GLP-1R adopts a conformation close to the active state. Our findings offer valuable insights into the distinct activation mechanisms of these three important receptors. It is possible that in the absence of a ligand, the intracellular half of transmembrane domain is mobilized with the help of G protein, which in turn rearranges the extracellular half to form a transitional conformation, facilitating the entry of the peptide N-terminus. | ||||||||||||||||||||||||
履歴 |
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-構造の表示
構造ビューア | 分子: MolmilJmol/JSmol |
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-ダウンロードとリンク
-ダウンロード
PDBx/mmCIF形式 | 8wg8.cif.gz | 197.6 KB | 表示 | PDBx/mmCIF形式 |
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PDB形式 | pdb8wg8.ent.gz | 150.1 KB | 表示 | PDB形式 |
PDBx/mmJSON形式 | 8wg8.json.gz | ツリー表示 | PDBx/mmJSON形式 | |
その他 | その他のダウンロード |
-検証レポート
文書・要旨 | 8wg8_validation.pdf.gz | 389.6 KB | 表示 | wwPDB検証レポート |
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文書・詳細版 | 8wg8_full_validation.pdf.gz | 399.2 KB | 表示 | |
XML形式データ | 8wg8_validation.xml.gz | 20.6 KB | 表示 | |
CIF形式データ | 8wg8_validation.cif.gz | 31.8 KB | 表示 | |
アーカイブディレクトリ | https://data.pdbj.org/pub/pdb/validation_reports/wg/8wg8 ftp://data.pdbj.org/pub/pdb/validation_reports/wg/8wg8 | HTTPS FTP |
-関連構造データ
関連構造データ | 37505MC 8wa3C 8wg7C M: このデータのモデリングに利用したマップデータ C: 同じ文献を引用 (文献) |
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類似構造データ | 類似検索 - 機能・相同性F&H 検索 |
-リンク
-集合体
登録構造単位 |
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1 |
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-要素
-Guanine nucleotide-binding protein ... , 3種, 3分子 ABG
#1: タンパク質 | 分子量: 41793.418 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) Homo sapiens (ヒト) 発現宿主: Spodoptera frugiperda (ツマジロクサヨトウ) |
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#2: タンパク質 | 分子量: 40226.992 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) Rattus norvegicus (ドブネズミ) / 遺伝子: Gnb1 発現宿主: Spodoptera frugiperda (ツマジロクサヨトウ) 参照: UniProt: P54311 |
#3: タンパク質 | 分子量: 7861.143 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) Bos taurus (ウシ) / 遺伝子: GNG2 発現宿主: Spodoptera frugiperda (ツマジロクサヨトウ) 参照: UniProt: P63212 |
-抗体 / タンパク質 / タンパク質・ペプチド , 3種, 3分子 NRE
#4: 抗体 | 分子量: 15343.019 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) synthetic construct (人工物) / 発現宿主: Escherichia coli (大腸菌) |
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#5: タンパク質 | 分子量: 46812.441 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) Homo sapiens (ヒト) / 遺伝子: GCGR 発現宿主: Spodoptera frugiperda (ツマジロクサヨトウ) 参照: UniProt: P47871 |
#6: タンパク質・ペプチド | 分子量: 1943.289 Da / 分子数: 1 / 由来タイプ: 組換発現 由来: (組換発現) Spodoptera frugiperda (ツマジロクサヨトウ) 発現宿主: Spodoptera frugiperda (ツマジロクサヨトウ) |
-詳細
Has protein modification | Y |
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-実験情報
-実験
実験 | 手法: 電子顕微鏡法 |
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EM実験 | 試料の集合状態: PARTICLE / 3次元再構成法: 単粒子再構成法 |
-試料調製
構成要素 | 名称: Cryo-EM structure of the human glucagon like peptide 1 receptor in complex with tirzepatide and G protein タイプ: COMPLEX / Entity ID: all / 由来: MULTIPLE SOURCES |
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由来(天然) | 生物種: Homo sapiens (ヒト) |
由来(組換発現) | 生物種: Spodoptera frugiperda (ツマジロクサヨトウ) |
緩衝液 | pH: 7.4 |
試料 | 包埋: NO / シャドウイング: NO / 染色: NO / 凍結: YES |
急速凍結 | 凍結剤: ETHANE |
-電子顕微鏡撮影
実験機器 | モデル: Titan Krios / 画像提供: FEI Company |
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顕微鏡 | モデル: FEI TITAN KRIOS |
電子銃 | 電子線源: OTHER / 加速電圧: 300 kV / 照射モード: OTHER |
電子レンズ | モード: BRIGHT FIELD / 最大 デフォーカス(公称値): 2200 nm / 最小 デフォーカス(公称値): 1200 nm |
撮影 | 電子線照射量: 80 e/Å2 / フィルム・検出器のモデル: GATAN K3 (6k x 4k) |
-解析
CTF補正 | タイプ: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||
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3次元再構成 | 解像度: 2.71 Å / 解像度の算出法: OTHER / 粒子像の数: 1232018 / 対称性のタイプ: POINT | ||||||||||||||||||||||||
拘束条件 |
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