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基本情報
登録情報 | ![]() | ||||||||||||
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タイトル | Cryo-EM structure of the octreotide-bound Somatostatin receptor 5-Gi protein complex | ||||||||||||
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![]() | Cryo-EM / GPCR / Somatostatin receptor 5 / octreotide / Gi / complex / SIGNALING PROTEIN | ||||||||||||
機能・相同性 | ![]() somatostatin receptor activity / neuropeptide binding / cellular response to glucocorticoid stimulus / positive regulation of cytokinesis / G protein-coupled receptor signaling pathway, coupled to cyclic nucleotide second messenger / neuropeptide signaling pathway / regulation of insulin secretion / Peptide ligand-binding receptors / Olfactory Signaling Pathway / Activation of the phototransduction cascade ...somatostatin receptor activity / neuropeptide binding / cellular response to glucocorticoid stimulus / positive regulation of cytokinesis / G protein-coupled receptor signaling pathway, coupled to cyclic nucleotide second messenger / neuropeptide signaling pathway / regulation of insulin secretion / Peptide ligand-binding receptors / 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 / 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 / glucose homeostasis / 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 / GTPase binding / Ca2+ pathway / fibroblast proliferation / High laminar flow shear stress activates signaling by PIEZO1 and PECAM1:CDH5:KDR in endothelial cells / G alpha (i) signalling events / G alpha (s) signalling events / phospholipase C-activating G protein-coupled receptor signaling pathway / G alpha (q) signalling events / Ras protein signal transduction / neuron projection / Extra-nuclear estrogen signaling / cell population proliferation / G protein-coupled receptor signaling pathway / negative regulation of cell population proliferation / lysosomal membrane / GTPase activity / synapse / protein-containing complex binding / signal transduction / extracellular exosome / membrane / plasma membrane / cytosol / cytoplasm 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: 2.9 Å | ||||||||||||
![]() | Xu HE / You C / Zhao L / Li J | ||||||||||||
資金援助 | ![]()
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![]() | ![]() タイトル: Structural basis for activation of somatostatin receptor 5 by cyclic neuropeptide agonists. 著者: Jingru Li / Chongzhao You / Yang Li / Changyao Li / Wenjia Fan / Zecai Chen / Wen Hu / Kai Wu / H Eric Xu / Li-Hua Zhao / ![]() 要旨: Somatostatin receptor 5 (SSTR5) is an important G protein-coupled receptor and drug target for neuroendocrine tumors and pituitary disorders. This study presents two high-resolution cryogenicelectron ...Somatostatin receptor 5 (SSTR5) is an important G protein-coupled receptor and drug target for neuroendocrine tumors and pituitary disorders. This study presents two high-resolution cryogenicelectron microscope structures of the SSTR5-G complexes bound to the cyclic neuropeptide agonists, cortistatin-17 (CST17) and octreotide, with resolutions of 2.7 Å and 2.9 Å, respectively. The structures reveal that binding of these peptides causes rearrangement of a "hydrophobic lock", consisting of residues from transmembrane helices TM3 and TM6. This rearrangement triggers outward movement of TM6, enabling Gα protein engagement and receptor activation. In addition to hydrophobic interactions, CST17 forms conserved polar contacts similar to somatostatin-14 binding to SSTR2, while further structural and functional analysis shows that extracellular loops differently recognize CST17 and octreotide. These insights elucidate agonist selectivity and activation mechanisms of SSTR5, providing valuable guidance for structure-based drug development targeting this therapeutically relevant receptor. | ||||||||||||
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マップデータ | ![]() | 59.6 MB | ![]() | |
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ヘッダ (付随情報) | ![]() ![]() | 23.6 KB 23.6 KB | 表示 表示 | ![]() |
画像 | ![]() | 38.1 KB | ||
Filedesc metadata | ![]() | 7.2 KB | ||
その他 | ![]() ![]() | 49.5 MB 49.5 MB | ||
アーカイブディレクトリ | ![]() ![]() | HTTPS FTP |
-検証レポート
文書・要旨 | ![]() | 976.3 KB | 表示 | ![]() |
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文書・詳細版 | ![]() | 975.9 KB | 表示 | |
XML形式データ | ![]() | 12.1 KB | 表示 | |
CIF形式データ | ![]() | 14.4 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 | ![]() 8x8nMC ![]() 8x8lC 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 | 類似検索 - 機能・相同性 ![]() |
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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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ボクセルのサイズ | X=Y=Z: 0.81 Å | ||||||||||||||||||||
密度 |
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対称性 | 空間群: 1 | ||||||||||||||||||||
詳細 | EMDB XML:
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-添付データ
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試料の構成要素
-全体 : Octreotide-bound Somatostatin receptor 5-Gi protein complex
全体 | 名称: Octreotide-bound Somatostatin receptor 5-Gi protein complex |
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要素 |
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-超分子 #1: Octreotide-bound Somatostatin receptor 5-Gi protein complex
超分子 | 名称: Octreotide-bound Somatostatin receptor 5-Gi protein complex タイプ: complex / ID: 1 / 親要素: 0 / 含まれる分子: all |
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由来(天然) | 生物種: ![]() |
-分子 #1: Guanine nucleotide-binding protein G(i) subunit alpha
分子 | 名称: Guanine nucleotide-binding protein G(i) subunit alpha タイプ: protein_or_peptide / ID: 1 / 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: 41.510012 KDa |
組換発現 | 生物種: ![]() |
配列 | 文字列: GCTLSAEDKA AVERSKMIEK QLQKDKQVYR ATHRLLLLGA DNSGKSTIVK QMRIYHVNGY SEEECKQYKA VVYSNTIQSI IAIIRAMGR LKIDFGDSAR ADDARQLFVL AGAAEEGFMT AELAGVIKRL WKDSGVQACF NRSREYQLND SAAYYLNDLD R IAQPNYIP ...文字列: GCTLSAEDKA AVERSKMIEK QLQKDKQVYR ATHRLLLLGA DNSGKSTIVK QMRIYHVNGY SEEECKQYKA VVYSNTIQSI IAIIRAMGR LKIDFGDSAR ADDARQLFVL AGAAEEGFMT AELAGVIKRL WKDSGVQACF NRSREYQLND SAAYYLNDLD R IAQPNYIP TQQDVLRTRV KTSGIFETKF QVDKVNFHMF DVGAQRDERR KWIQCFNDVT AIIFVVDSSD YNRLQEALND FK SIWNNRW LRTISVILFL NKQDLLAEKV LAGKSKIEDY FPEFARYTTP EDATPEPGED PRVTRAKYFI RDEFLRISTA SGD GRHYCY PHFTCSVDTE NARRIFNDVT DIIIKMNLRD CGLF |
-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: 40.226992 KDa |
組換発現 | 生物種: ![]() |
配列 | 文字列: MGSLLQSELD QLRQEAEQLK NQIRDARKAC ADATLSQITN NIDPVGRIQM RTRRTLRGHL AKIYAMHWGT DSRLLVSASQ DGKLIIWDS YTTNKVHAIP LRSSWVMTCA YAPSGNYVAC GGLDNICSIY NLKTREGNVR VSRELAGHTG YLSCCRFLDD N QIVTSSGD ...文字列: MGSLLQSELD QLRQEAEQLK NQIRDARKAC ADATLSQITN NIDPVGRIQM RTRRTLRGHL AKIYAMHWGT DSRLLVSASQ DGKLIIWDS YTTNKVHAIP LRSSWVMTCA YAPSGNYVAC GGLDNICSIY NLKTREGNVR VSRELAGHTG YLSCCRFLDD N QIVTSSGD TTCALWDIET GQQTTTFTGH TGDVMSLSLA PDTRLFVSGA CDASAKLWDV REGMCRQTFT GHESDINAIC FF PNGNAFA TGSDDATCRL FDLRADQELM TYSHDNIICG ITSVSFSKSG RLLLAGYDDF NCNVWDALKA DRAGVLAGHD NRV SCLGVT DDGMAVATGS WDSFLKIWNG SSGGGGSGGG GSSGVSGWRL FKKIS UniProtKB: Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1 |
-分子 #3: ScFv16
分子 | 名称: ScFv16 / 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: 26.466486 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 K |
-分子 #4: 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: 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: 7.729947 KDa |
組換発現 | 生物種: ![]() |
配列 | 文字列: ASNNTASIAQ ARKLVEQLKM EANIDRIKVS KAAADLMAYC EAHAKEDPLL TPVPASENPF REKKFFCAIL UniProtKB: Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2 |
-分子 #5: Somatostatin receptor type 5
分子 | 名称: Somatostatin receptor type 5 / 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: ![]() |
分子量 | 理論値: 39.249203 KDa |
組換発現 | 生物種: ![]() |
配列 | 文字列: MEPLFPASTP SWNASSPGAA SGGGDNRTLV GPAPSAGARA VLVPVLYLLV CAAGLGGNTL VIYVVLRFAK MKTVTNIYIL NLAVADVLY MLGLPFLATQ NAASFWPFGP VLCRLVMTLD GVNQFTSVFC LTVMSVDRYL AVVHPLSSAR WRRPRVAKLA S AAAWVLSL ...文字列: MEPLFPASTP SWNASSPGAA SGGGDNRTLV GPAPSAGARA VLVPVLYLLV CAAGLGGNTL VIYVVLRFAK MKTVTNIYIL NLAVADVLY MLGLPFLATQ NAASFWPFGP VLCRLVMTLD GVNQFTSVFC LTVMSVDRYL AVVHPLSSAR WRRPRVAKLA S AAAWVLSL CMSLPLLVFA DVQEGGTCNA SWPEPVGLWG AVFIIYTAVL GFFAPLLVIC LCYLLIVVKV RAAGVRVGCV RR RSERKVT RMVLVLVLVF AGCWLPFFTV NIVNLAVALP QEPASAGLYF FVVILSYANS CANPVLYGFL SDNFRQSFQK VLC LRKGSG AKDADATEPR PDRIRQQQEA TPPAHRAAAN GLMQTSKL UniProtKB: Somatostatin receptor type 5 |
-分子 #6: octreotide
分子 | 名称: octreotide / タイプ: protein_or_peptide / ID: 6 / 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: 1.036246 KDa |
配列 | 文字列: (DPN)CF(DTR)KTCT |
-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: 7.4 |
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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: FEI FALCON IV (4k x 4k) 平均電子線量: 1.39 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: FLOOD BEAM / 撮影モード: BRIGHT FIELD / 最大 デフォーカス(公称値): 30.0 µm / 最小 デフォーカス(公称値): 5.0 µm |
実験機器 | ![]() モデル: Titan Krios / 画像提供: FEI Company |