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基本情報
登録情報 | データベース: PDB / ID: 7t11 | ||||||
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タイトル | CryoEM structure of somatostatin receptor 2 in complex with Octreotide and Gi3. | ||||||
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![]() | MEMBRANE PROTEIN/SIGNALING PROTEIN / GPCR / Receptor / Complex / MEMBRANE PROTEIN / MEMBRANE PROTEIN-SIGNALING PROTEIN complex | ||||||
機能・相同性 | ![]() response to acrylamide / adenylate cyclase-inhibiting opioid receptor signaling pathway / dynorphin receptor activity / regulation of saliva secretion / negative regulation of luteinizing hormone secretion / sensory perception of temperature stimulus / somatostatin receptor activity / positive regulation of eating behavior / G protein-coupled opioid receptor activity / G protein-coupled opioid receptor signaling pathway ...response to acrylamide / adenylate cyclase-inhibiting opioid receptor signaling pathway / dynorphin receptor activity / regulation of saliva secretion / negative regulation of luteinizing hormone secretion / sensory perception of temperature stimulus / somatostatin receptor activity / positive regulation of eating behavior / G protein-coupled opioid receptor activity / G protein-coupled opioid receptor signaling pathway / positive regulation of dopamine secretion / sensory perception / negative regulation of adenylate cyclase activity / positive regulation of potassium ion transmembrane transport / maternal behavior / receptor serine/threonine kinase binding / neuropeptide binding / positive regulation of p38MAPK cascade / GTP metabolic process / eating behavior / cellular response to glucocorticoid stimulus / positive regulation of macroautophagy / conditioned place preference / G protein-coupled receptor signaling pathway, coupled to cyclic nucleotide second messenger / neuropeptide signaling pathway / estrous cycle / behavioral response to cocaine / MECP2 regulates neuronal receptors and channels / Adenylate cyclase inhibitory pathway / axon terminus / sensory perception of pain / T-tubule / Peptide ligand-binding receptors / sarcoplasmic reticulum / response to nicotine / PDZ domain binding / locomotory behavior / cellular response to glucose stimulus / cellular response to estradiol stimulus / G protein-coupled receptor binding / adenylate cyclase-inhibiting G protein-coupled receptor signaling pathway / response to insulin / adenylate cyclase-modulating G protein-coupled receptor signaling pathway / centriolar satellite / G-protein beta/gamma-subunit complex binding / response to estrogen / 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 / photoreceptor disc membrane / Sensory perception of sweet, bitter, and umami (glutamate) taste / Glucagon-type ligand receptors / Adrenaline,noradrenaline inhibits insulin secretion / Vasopressin regulates renal water homeostasis via Aquaporins / GDP binding / synaptic vesicle membrane / Glucagon-like Peptide-1 (GLP1) regulates insulin secretion / G alpha (z) signalling events / ADP signalling through P2Y purinoceptor 1 / cellular response to catecholamine stimulus / ADORA2B mediated anti-inflammatory cytokines production / G beta:gamma signalling through PI3Kgamma / 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 / presynaptic membrane / cellular response to lipopolysaccharide / GTPase binding / Ca2+ pathway / midbody / fibroblast proliferation / High laminar flow shear stress activates signaling by PIEZO1 and PECAM1:CDH5:KDR in endothelial cells / response to ethanol / G alpha (i) signalling events / perikaryon / G alpha (s) signalling events / phospholipase C-activating G protein-coupled receptor signaling pathway / chemical synaptic transmission 類似検索 - 分子機能 | ||||||
生物種 | ![]() ![]() ![]() synthetic construct (人工物) | ||||||
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: 2.7 Å | ||||||
![]() | Robertson, M.J. / Skinotis, G. | ||||||
資金援助 | 1件
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![]() | ![]() タイトル: Plasticity in ligand recognition at somatostatin receptors. 著者: Michael J Robertson / Justin G Meyerowitz / Ouliana Panova / Kenneth Borrelli / Georgios Skiniotis / ![]() 要旨: Somatostatin is a signaling peptide that plays a pivotal role in physiologic processes relating to metabolism and growth through its actions at somatostatin receptors (SSTRs). Members of the SSTR ...Somatostatin is a signaling peptide that plays a pivotal role in physiologic processes relating to metabolism and growth through its actions at somatostatin receptors (SSTRs). Members of the SSTR subfamily, particularly SSTR2, are key drug targets for neuroendocrine neoplasms, with synthetic peptide agonists currently in clinical use. Here, we show the cryogenic-electron microscopy structures of active-state SSTR2 in complex with heterotrimeric G and either the endogenous ligand SST14 or the FDA-approved drug octreotide. Complemented by biochemical assays and molecular dynamics simulations, these structures reveal key details of ligand recognition and receptor activation at SSTRs. We find that SSTR ligand recognition is highly diverse, as demonstrated by ligand-induced conformational changes in ECL2 and substantial sequence divergence across subtypes in extracellular regions. Despite this complexity, we rationalize several known sources of SSTR subtype selectivity and identify an additional interaction for specific binding. These results provide valuable insights for structure-based drug discovery at SSTRs. | ||||||
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構造の表示
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構造ビューア | 分子: ![]() ![]() |
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ダウンロード
PDBx/mmCIF形式 | ![]() | 202.5 KB | 表示 | ![]() |
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PDB形式 | ![]() | 157.9 KB | 表示 | ![]() |
PDBx/mmJSON形式 | ![]() | ツリー表示 | ![]() | |
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-検証レポート
文書・要旨 | ![]() | 816.2 KB | 表示 | ![]() |
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文書・詳細版 | ![]() | 819.7 KB | 表示 | |
XML形式データ | ![]() | 34.3 KB | 表示 | |
CIF形式データ | ![]() | 52.6 KB | 表示 | |
アーカイブディレクトリ | ![]() ![]() | HTTPS FTP |
-関連構造データ
関連構造データ | ![]() 25587MC ![]() 7t10C 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 ( |
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類似構造データ | |
電子顕微鏡画像生データ | ![]() Data size: 4.2 TB Data #1: Raw movies of SSTR2/Octreotide/Gi3 complex collected on a K3 [micrographs - multiframe]) |
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リンク
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集合体
登録構造単位 | ![]()
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要素
-Guanine nucleotide-binding protein ... , 3種, 3分子 ABC
#1: タンパク質 | 分子量: 40584.156 Da / 分子数: 1 / 変異: S47N, G203A, E245A, A326S / 由来タイプ: 組換発現 / 詳細: dominant negative / 由来: (組換発現) ![]() ![]() |
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#2: タンパク質 | 分子量: 37671.102 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() ![]() |
#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) ![]() ![]() |
-抗体 / タンパク質・ペプチド / タンパク質 , 3種, 3分子 SPR
#4: 抗体 | 分子量: 27784.896 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() ![]() 発現宿主: ![]() ![]() |
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#5: タンパク質・ペプチド | 分子量: 1022.263 Da / 分子数: 1 / 由来タイプ: 合成 / 由来: (合成) synthetic construct (人工物) |
#6: タンパク質 | 分子量: 45784.211 Da / 分子数: 1 / 由来タイプ: 組換発現 詳細: Somatostatin receptor type 2 with intracellular loop 3 (ICL3) replaced with the ICL3 from the Kappa-type opioid receptor 由来: (組換発現) ![]() 発現宿主: ![]() ![]() 参照: UniProt: P30874, UniProt: P41145 |
-詳細
研究の焦点であるリガンドがあるか | 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 |
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試料調製
構成要素 | 名称: Somatostatin receptor 2 in complex with Octreotide and Gi3. タイプ: COMPLEX / Entity ID: all / 由来: MULTIPLE SOURCES |
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緩衝液 | pH: 7.5 |
試料 | 包埋: NO / シャドウイング: NO / 染色: NO / 凍結: YES |
試料支持 | グリッドの材料: GOLD |
急速凍結 | 凍結剤: ETHANE |
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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: ![]() |
電子レンズ | モード: BRIGHT FIELD |
撮影 | 電子線照射量: 1.22 e/Å2 / フィルム・検出器のモデル: GATAN K3 (6k x 4k) |
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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: 2.7 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 281479 / 対称性のタイプ: POINT |