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基本情報
| 登録情報 | データベース: PDB / ID: 8zbe | ||||||
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| タイトル | cryo-EM structure of the octreotide-bound SSTR5-Gi complex | ||||||
要素 |
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キーワード | MEMBRANE PROTEIN/IMMUNE SYSTEM / SSTR5 / octreoitde / structural protein / MEMBRANE PROTEIN-IMMUNE SYSTEM complex | ||||||
| 機能・相同性 | 機能・相同性情報somatostatin 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 / positive regulation of mini excitatory postsynaptic potential ...somatostatin 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 / positive regulation of mini excitatory postsynaptic potential / beta2-adrenergic receptor activity / negative regulation of smooth muscle contraction / Activation of G protein gated Potassium channels / Inhibition of voltage gated Ca2+ channels via Gbeta/gamma subunits / Ca2+ pathway / G alpha (z) signalling events / High laminar flow shear stress activates signaling by PIEZO1 and PECAM1:CDH5:KDR in endothelial cells / Glucagon-like Peptide-1 (GLP1) regulates insulin secretion / AMPA selective glutamate receptor signaling pathway / Vasopressin regulates renal water homeostasis via Aquaporins / neuropeptide binding / norepinephrine-epinephrine-mediated vasodilation involved in regulation of systemic arterial blood pressure / positive regulation of autophagosome maturation / heat generation / norepinephrine binding / Adrenaline,noradrenaline inhibits insulin secretion / ADP signalling through P2Y purinoceptor 12 / Adrenoceptors / G alpha (q) signalling events / G alpha (i) signalling events / positive regulation of lipophagy / Thrombin signalling through proteinase activated receptors (PARs) / negative regulation of G protein-coupled receptor signaling pathway / negative regulation of multicellular organism growth / cellular response to glucocorticoid stimulus / photoreceptor outer segment membrane / response to psychosocial stress / adrenergic receptor signaling pathway / endosome to lysosome transport / spectrin binding / diet induced thermogenesis / positive regulation of cytokinesis / alkylglycerophosphoethanolamine phosphodiesterase activity / positive regulation of cAMP/PKA signal transduction / adenylate cyclase binding / smooth muscle contraction / photoreceptor outer segment / bone resorption / potassium channel regulator activity / positive regulation of bone mineralization / G protein-coupled receptor signaling pathway, coupled to cyclic nucleotide second messenger / neuropeptide signaling pathway / brown fat cell differentiation / neuronal dense core vesicle / adenylate cyclase inhibitor activity / intercellular bridge / regulation of sodium ion transport / adenylate cyclase-activating adrenergic receptor signaling pathway / positive regulation of protein localization to cell cortex / T cell migration / Adenylate cyclase inhibitory pathway / D2 dopamine receptor binding / response to prostaglandin E / cardiac muscle cell apoptotic process / photoreceptor inner segment / G protein-coupled serotonin receptor binding / adenylate cyclase regulator activity / adenylate cyclase-inhibiting serotonin receptor signaling pathway / regulation of insulin secretion / receptor-mediated endocytosis / cellular response to forskolin / response to cold / Peptide ligand-binding receptors / regulation of mitotic spindle organization / Regulation of insulin secretion / clathrin-coated endocytic vesicle membrane / 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 / adenylate cyclase-modulating G protein-coupled receptor signaling pathway / centriolar satellite / G-protein beta/gamma-subunit complex binding / cellular response to amyloid-beta / ADP signalling through P2Y purinoceptor 12 / mitotic spindle / GDP binding / Adrenaline,noradrenaline inhibits insulin secretion / G alpha (z) signalling events / ADORA2B mediated anti-inflammatory cytokines production / Cargo recognition for clathrin-mediated endocytosis / GPER1 signaling / G-protein beta-subunit binding / heterotrimeric G-protein complex / glucose homeostasis / sensory perception of taste / amyloid-beta binding / positive regulation of cold-induced thermogenesis / Clathrin-mediated endocytosis 類似検索 - 分子機能 | ||||||
| 生物種 | Homo sapiens (ヒト) Oplophorus gracilirostris (甲殻類)![]() 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: 3.24 Å | ||||||
データ登録者 | Li, Y.G. / Meng, X.Y. / Yang, X.R. / Ling, S.L. / Shi, P. / Tian, C.L. / Yang, F. | ||||||
| 資金援助 | 1件
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引用 | ジャーナル: Acta Pharmacol Sin / 年: 2024タイトル: Structural insights into somatostatin receptor 5 bound with cyclic peptides. 著者: Ying-Ge Li / Xian-Yu Meng / Xiru Yang / Sheng-Long Ling / Pan Shi / Chang-Lin Tian / Fan Yang / ![]() 要旨: Somatostatin receptor 5 (SSTR5) is highly expressed in ACTH-secreting pituitary adenomas and is an important drug target for the treatment of Cushing's disease. Two cyclic SST analog peptides ...Somatostatin receptor 5 (SSTR5) is highly expressed in ACTH-secreting pituitary adenomas and is an important drug target for the treatment of Cushing's disease. Two cyclic SST analog peptides (pasireotide and octreotide) both can activate SSTR5 and SSTR2. Pasireotide is preferential binding to SSTR5 than octreotide, while octreotide is biased to SSTR2 than SSTR5. The lack of selectivity of both pasireotide and octreotide causes side effects, such as hyperglycemia, gastrointestinal disturbance, and abnormal glucose homeostasis. However, little is known about the binding and selectivity mechanisms of pasireotide and octreotide with SSTR5, limiting the development of subtype-selective SST analog drugs specifically targeting SSTR5. Here, we report two cryo-electron microscopy (cryo-EM) structures of SSTR5-Gi complexes activated by pasireotide and octreoitde at resolutions of 3.09 Å and 3.24 Å, respectively. In combination with structural analysis and functional experiments, our results reveal the molecular mechanisms of ligand recognition and receptor activation. We also demonstrate that pasireotide preferentially binds to SSTR5 through the interactions between Tyr(Bzl)/Trp of pasireotide and SSTR5. Moreover, we find that the Q, N, F and ECL2 of SSTR2 play a crucial role in octreotide biased binding of SSTR2. Our results will provide structural insights and offer new opportunities for the drug discovery of better selective pharmaceuticals targeting specific SSTR subtypes. | ||||||
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構造の表示
| 構造ビューア | 分子: Molmil Jmol/JSmol |
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ダウンロードとリンク
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ダウンロード
| PDBx/mmCIF形式 | 8zbe.cif.gz | 225.4 KB | 表示 | PDBx/mmCIF形式 |
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| PDB形式 | pdb8zbe.ent.gz | 159.9 KB | 表示 | PDB形式 |
| PDBx/mmJSON形式 | 8zbe.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
| アーカイブディレクトリ | https://data.pdbj.org/pub/pdb/validation_reports/zb/8zbe ftp://data.pdbj.org/pub/pdb/validation_reports/zb/8zbe | HTTPS FTP |
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-関連構造データ
| 関連構造データ | ![]() 39901MC ![]() 8zcjC 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 | 類似検索 - 機能・相同性 F&H 検索 |
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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 BDC
| #2: タンパク質 | 分子量: 40445.059 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: GNAI1発現宿主: ![]() 参照: UniProt: P63096 |
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| #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) ![]() 発現宿主: ![]() 参照: UniProt: A0A9X9ZA26 |
| #6: タンパク質 | 分子量: 41055.867 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() 発現宿主: ![]() 参照: UniProt: P54311 |
-タンパク質 / 抗体 / タンパク質・ペプチド , 3種, 3分子 AEP
| #1: タンパク質 | 分子量: 62015.930 Da / 分子数: 1 / 由来タイプ: 組換発現 由来: (組換発現) Homo sapiens (ヒト), (組換発現) Oplophorus gracilirostris (甲殻類)遺伝子: ADRB2, ADRB2R, B2AR, SSTR5 発現宿主: ![]() 参照: UniProt: P07550, UniProt: P35346 |
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| #4: 抗体 | 分子量: 32708.473 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: ![]() |
| #5: タンパク質・ペプチド | 分子量: 1036.246 Da / 分子数: 1 / 由来タイプ: 合成 / 由来: (合成) synthetic construct (人工物) |
-詳細
| 研究の焦点であるリガンドがあるか | Y |
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| Has protein modification | Y |
-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: octreotide-bound SSTR5-Gi complex / タイプ: COMPLEX / Entity ID: #1-#5 / 由来: RECOMBINANT | ||||||||||||||||||||
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| 由来(天然) |
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| 由来(組換発現) | 生物種: ![]() | ||||||||||||||||||||
| 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 | ||||||||||||||||||||
| 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: FIELD EMISSION GUN / 加速電圧: 300 kV / 照射モード: SPOT SCAN |
| 電子レンズ | モード: DIFFRACTION / 最大 デフォーカス(公称値): 2000 nm / 最小 デフォーカス(公称値): 1400 nm |
| 撮影 | 電子線照射量: 55 e/Å2 / フィルム・検出器のモデル: GATAN K3 (6k x 4k) |
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解析
| EMソフトウェア | 名称: PHENIX / バージョン: 1.20.1_4487: / カテゴリ: モデル精密化 | ||||||||||||||||||||||||
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| CTF補正 | タイプ: NONE | ||||||||||||||||||||||||
| 3次元再構成 | 解像度: 3.24 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 452725 / 対称性のタイプ: POINT | ||||||||||||||||||||||||
| 拘束条件 |
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ムービー
コントローラー
万見について




Homo sapiens (ヒト)
Oplophorus gracilirostris (甲殻類)

引用



PDBj



























FIELD EMISSION GUN