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基本情報
登録情報 | データベース: EMDB / ID: EMD-25587 | |||||||||
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タイトル | CryoEM structure of somatostatin receptor 2 in complex with Octreotide and Gi3. | |||||||||
![]() | CryoEM single particle reconstruction of SSTR2/Gi3 complex with octreotide. | |||||||||
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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 / positive regulation of eating behavior / somatostatin receptor activity / 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 / positive regulation of eating behavior / somatostatin receptor activity / G protein-coupled opioid receptor activity / G protein-coupled opioid receptor signaling pathway / peristalsis / positive regulation of dopamine secretion / sensory perception / positive regulation of potassium ion transmembrane transport / negative regulation of adenylate cyclase activity / receptor serine/threonine kinase binding / maternal behavior / conditioned place preference / neuropeptide binding / positive regulation of p38MAPK cascade / GTP metabolic process / cellular response to glucocorticoid stimulus / eating behavior / response to starvation / behavioral response to cocaine / positive regulation of macroautophagy / G protein-coupled receptor signaling pathway, coupled to cyclic nucleotide second messenger / neuropeptide signaling pathway / Adenylate cyclase inhibitory pathway / forebrain development / estrous cycle / MECP2 regulates neuronal receptors and channels / axon terminus / sensory perception of pain / T-tubule / cerebellum development / Peptide ligand-binding receptors / sarcoplasmic reticulum / PDZ domain binding / locomotory behavior / response to insulin / response to nicotine / cellular response to estradiol stimulus / G protein-coupled receptor binding / cellular response to glucose stimulus / adenylate cyclase-inhibiting G protein-coupled receptor signaling pathway / adenylate cyclase-modulating G protein-coupled receptor signaling pathway / G-protein beta/gamma-subunit complex binding / centriolar satellite / 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 / response to estrogen / G-protein activation / Activation of G protein gated Potassium channels / Inhibition of voltage gated Ca2+ channels via Gbeta/gamma subunits / synaptic vesicle membrane / 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 / Adrenaline,noradrenaline inhibits insulin secretion / Vasopressin regulates renal water homeostasis via Aquaporins / GDP binding / G alpha (z) signalling events / Glucagon-like Peptide-1 (GLP1) regulates insulin secretion / cellular response to catecholamine stimulus / ADORA2B mediated anti-inflammatory cytokines production / ADP signalling through P2Y purinoceptor 1 / 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) / presynaptic membrane / cellular response to lipopolysaccharide / GTPase binding / retina development in camera-type eye / Ca2+ pathway / midbody / High laminar flow shear stress activates signaling by PIEZO1 and PECAM1:CDH5:KDR in endothelial cells / fibroblast proliferation / G alpha (i) signalling events / G alpha (s) signalling events 類似検索 - 分子機能 | |||||||||
生物種 | ![]() ![]() ![]() | |||||||||
手法 | 単粒子再構成法 / クライオ電子顕微鏡法 / 解像度: 2.7 Å | |||||||||
![]() | Robertson MJ / 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. | |||||||||
履歴 |
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構造の表示
ムービー |
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構造ビューア | EMマップ: ![]() ![]() ![]() |
添付画像 |
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ダウンロードとリンク
-EMDBアーカイブ
マップデータ | ![]() | 167.9 MB | ![]() | |
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ヘッダ (付随情報) | ![]() ![]() | 17.1 KB 17.1 KB | 表示 表示 | ![]() |
画像 | ![]() | 79.6 KB | ||
その他 | ![]() | 168 MB | ||
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 | ![]() 7t11MC ![]() 7t10C M: このマップから作成された原子モデル 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
EMDBのページ | ![]() ![]() |
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「今月の分子」の関連する項目 |
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マップ
ファイル | ![]() | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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注釈 | CryoEM single particle reconstruction of SSTR2/Gi3 complex with octreotide. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
投影像・断面図 | 画像のコントロール
画像は Spider により作成 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
ボクセルのサイズ | X=Y=Z: 0.8521 Å | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
密度 |
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対称性 | 空間群: 1 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
詳細 | EMDB XML:
CCP4マップ ヘッダ情報:
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-添付データ
-追加マップ: Focused refinement on receptor and G alpha I...
ファイル | emd_25587_additional_1.map | ||||||||||||
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注釈 | Focused refinement on receptor and G alpha I CryoEM single particle reconstruction of SSTR2/Gi3 complex with octreotide. | ||||||||||||
投影像・断面図 |
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密度ヒストグラム |
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試料の構成要素
-全体 : Somatostatin receptor 2 in complex with Octreotide and Gi3.
全体 | 名称: Somatostatin receptor 2 in complex with Octreotide and Gi3. |
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要素 |
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-超分子 #1: Somatostatin receptor 2 in complex with Octreotide and Gi3.
超分子 | 名称: Somatostatin receptor 2 in complex with Octreotide and Gi3. タイプ: complex / ID: 1 / 親要素: 0 / 含まれる分子: all |
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-分子 #1: Guanine nucleotide-binding protein G(i) subunit alpha-3
分子 | 名称: Guanine nucleotide-binding protein G(i) subunit alpha-3 タイプ: protein_or_peptide / ID: 1 / 詳細: dominant negative / コピー数: 1 / 光学異性体: LEVO |
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由来(天然) | 生物種: ![]() |
分子量 | 理論値: 40.584156 KDa |
組換発現 | 生物種: ![]() |
配列 | 文字列: MGCTLSAEDK AAVERSKMID RNLREDGEKA AKEVKLLLLG AGESGKNTIV KQMKIIHEDG YSEDECKQYK VVVYSNTIQS IIAIIRAMG RLKIDFGEAA RADDARQLFV LAGSAEEGVM TPELAGVIKR LWRDGGVQAC FSRSREYQLN DSASYYLNDL D RISQSNYI ...文字列: MGCTLSAEDK AAVERSKMID RNLREDGEKA AKEVKLLLLG AGESGKNTIV KQMKIIHEDG YSEDECKQYK VVVYSNTIQS IIAIIRAMG RLKIDFGEAA RADDARQLFV LAGSAEEGVM TPELAGVIKR LWRDGGVQAC FSRSREYQLN DSASYYLNDL D RISQSNYI PTQQDVLRTR VKTTGIVETH FTFKDLYFKM FDVGAQRSER KKWIHCFEGV TAIIFCVALS DYDLVLAEDE EM NRMHASM KLFDSICNNK WFTETSIILF LNKKDLFEEK IKRSPLTICY PEYTGSNTYE EAAAYIQCQF EDLNRRKDTK EIY THFTCS TDTKNVQFVF DAVTDVIIKN NLKECGLY |
-分子 #2: Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1
分子 | 名称: Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1 タイプ: protein_or_peptide / ID: 2 / コピー数: 1 / 光学異性体: LEVO |
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由来(天然) | 生物種: ![]() |
分子量 | 理論値: 37.671102 KDa |
組換発現 | 生物種: ![]() |
配列 | 文字列: PGSSGSELDQ LRQEAEQLKN QIRDARKACA DATLSQITNN IDPVGRIQMR TRRTLRGHLA KIYAMHWGTD SRLLVSASQD GKLIIWDSY TTNKVHAIPL RSSWVMTCAY APSGNYVACG GLDNICSIYN LKTREGNVRV SRELAGHTGY LSCCRFLDDN Q IVTSSGDT ...文字列: PGSSGSELDQ LRQEAEQLKN QIRDARKACA DATLSQITNN IDPVGRIQMR TRRTLRGHLA KIYAMHWGTD SRLLVSASQD GKLIIWDSY TTNKVHAIPL RSSWVMTCAY APSGNYVACG GLDNICSIYN LKTREGNVRV SRELAGHTGY LSCCRFLDDN Q IVTSSGDT TCALWDIETG QQTTTFTGHT GDVMSLSLAP DTRLFVSGAC DASAKLWDVR EGMCRQTFTG HESDINAICF FP NGNAFAT GSDDATCRLF DLRADQELMT YSHDNIICGI TSVSFSKSGR LLLAGYDDFN CNVWDALKAD RAGVLAGHDN RVS CLGVTD DGMAVATGSW DSFLKIWN |
-分子 #3: Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2
分子 | 名称: Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2 タイプ: protein_or_peptide / ID: 3 / コピー数: 1 / 光学異性体: LEVO |
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由来(天然) | 生物種: ![]() |
分子量 | 理論値: 7.861143 KDa |
組換発現 | 生物種: ![]() |
配列 | 文字列: MASNNTASIA QARKLVEQLK MEANIDRIKV SKAAADLMAY CEAHAKEDPL LTPVPASENP FREKKFFCAI L |
-分子 #4: scFv16
分子 | 名称: scFv16 / タイプ: protein_or_peptide / ID: 4 / コピー数: 1 / 光学異性体: LEVO |
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由来(天然) | 生物種: ![]() ![]() |
分子量 | 理論値: 27.784896 KDa |
組換発現 | 生物種: ![]() ![]() |
配列 | 文字列: DVQLVESGGG LVQPGGSRKL SCSASGFAFS SFGMHWVRQA PEKGLEWVAY ISSGSGTIYY ADTVKGRFTI SRDDPKNTLF LQMTSLRSE DTAMYYCVRS IYYYGSSPFD FWGQGTTLTV SSGGGGSGGG GSGGGGSDIV MTQATSSVPV TPGESVSISC R SSKSLLHS ...文字列: DVQLVESGGG LVQPGGSRKL SCSASGFAFS SFGMHWVRQA PEKGLEWVAY ISSGSGTIYY ADTVKGRFTI SRDDPKNTLF LQMTSLRSE DTAMYYCVRS IYYYGSSPFD FWGQGTTLTV SSGGGGSGGG GSGGGGSDIV MTQATSSVPV TPGESVSISC R SSKSLLHS NGNTYLYWFL QRPGQSPQLL IYRMSNLASG VPDRFSGSGS GTAFTLTISR LEAEDVGVYY CMQHLEYPLT FG AGTKLEL KAAAHHHHHH HH |
-分子 #5: Octreotide
分子 | 名称: Octreotide / タイプ: protein_or_peptide / ID: 5 / コピー数: 1 / 光学異性体: LEVO |
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由来(天然) | 生物種: synthetic construct (人工物) |
分子量 | 理論値: 1.022263 KDa |
配列 | 文字列: (DPN)CF(DTR)KTC(THO) |
-分子 #6: Somatostatin receptor type 2,Kappa-type opioid receptor
分子 | 名称: Somatostatin receptor type 2,Kappa-type opioid receptor タイプ: protein_or_peptide / ID: 6 詳細: Somatostatin receptor type 2 with intracellular loop 3 (ICL3) replaced with the ICL3 from the Kappa-type opioid receptor コピー数: 1 / 光学異性体: LEVO |
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由来(天然) | 生物種: ![]() |
分子量 | 理論値: 45.784211 KDa |
組換発現 | 生物種: ![]() ![]() |
配列 | 文字列: DYKDDDDAMG QPGNGSAFLL APNRSHAPDH DVENLYFQGM DMADEPLNGS HTWLSIPFDL NGSVVSTNTS NQTEPYYDLT SNAVLTFIY FVVCIIGLCG NTLVIYVILR YAKMKTITNI YILNLAIADE LFMLGLPFLA MQVALVHWPF GKAICRVVMT V DGINQFTS ...文字列: DYKDDDDAMG QPGNGSAFLL APNRSHAPDH DVENLYFQGM DMADEPLNGS HTWLSIPFDL NGSVVSTNTS NQTEPYYDLT SNAVLTFIY FVVCIIGLCG NTLVIYVILR YAKMKTITNI YILNLAIADE LFMLGLPFLA MQVALVHWPF GKAICRVVMT V DGINQFTS IFCLTVMSID RYLAVVHPIK SAKWRRPRTA KMITMAVWGV SLLVILPIMI YAGLRSNQWG RSSCTINWPG ES GAWYTGF IIYTFILGFL VPLTIICLCY LFIIIKVKSV RLLSGSREKD RNLRKVTRMV SIVVAVFIFC WLPFYIFNVS SVS MAISPT PALKGMFDFV VVLTYANSCA NPILYAFLSD NFKKSFQNVL CLVKVSGTDD GERSDSKQDK SRLNETTETQ RTLL NGDLQ TSI |
-実験情報
-構造解析
手法 | クライオ電子顕微鏡法 |
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![]() | 単粒子再構成法 |
試料の集合状態 | particle |
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試料調製
緩衝液 | pH: 7.5 |
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グリッド | 材質: GOLD |
凍結 | 凍結剤: ETHANE |
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電子顕微鏡法
顕微鏡 | FEI TITAN KRIOS |
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撮影 | フィルム・検出器のモデル: GATAN K3 (6k x 4k) / 平均電子線量: 1.22 e/Å2 |
電子線 | 加速電圧: 300 kV / 電子線源: ![]() |
電子光学系 | 照射モード: OTHER / 撮影モード: BRIGHT FIELD |
実験機器 | ![]() モデル: Titan Krios / 画像提供: FEI Company |
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画像解析
初期モデル | モデルのタイプ: OTHER / 詳細: ab initio |
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最終 再構成 | 解像度のタイプ: BY AUTHOR / 解像度: 2.7 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 使用した粒子像数: 281479 |
初期 角度割当 | タイプ: MAXIMUM LIKELIHOOD |
最終 角度割当 | タイプ: MAXIMUM LIKELIHOOD |