+データを開く
-基本情報
登録情報 | データベース: PDB / ID: 7vkt | ||||||
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タイトル | cryo-EM structure of LTB4-bound BLT1 in complex with Gi protein | ||||||
要素 |
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キーワード | MEMBRANE PROTEIN / GPCR | ||||||
機能・相同性 | 機能・相同性情報 leukotriene B4 receptor activity / leukotriene receptor activity / Leukotriene receptors / G protein-coupled peptide receptor activity / plasma membrane => GO:0005886 / Adenylate cyclase inhibitory pathway / neuropeptide signaling pathway / positive regulation of protein localization to cell cortex / regulation of cAMP-mediated signaling / D2 dopamine receptor binding ...leukotriene B4 receptor activity / leukotriene receptor activity / Leukotriene receptors / G protein-coupled peptide receptor activity / plasma membrane => GO:0005886 / Adenylate cyclase inhibitory pathway / neuropeptide signaling pathway / positive regulation of protein localization to cell cortex / regulation of cAMP-mediated signaling / D2 dopamine receptor binding / G protein-coupled serotonin receptor binding / regulation of mitotic spindle organization / cellular response to forskolin / adenylate cyclase-inhibiting G protein-coupled receptor signaling pathway / muscle contraction / Regulation of insulin secretion / G protein-coupled receptor binding / G-protein beta/gamma-subunit complex binding / Olfactory Signaling Pathway / Activation of the phototransduction cascade / adenylate cyclase-modulating G protein-coupled receptor signaling pathway / G beta:gamma signalling through PLC beta / Presynaptic function of Kainate receptors / Thromboxane signalling through TP receptor / G-protein activation / G protein-coupled acetylcholine receptor signaling pathway / Activation of G protein gated Potassium channels / Inhibition of voltage gated Ca2+ channels via Gbeta/gamma subunits / Prostacyclin signalling through prostacyclin receptor / Glucagon signaling in metabolic regulation / G beta:gamma signalling through CDC42 / ADP signalling through P2Y purinoceptor 12 / G beta:gamma signalling through BTK / response to peptide hormone / Synthesis, secretion, and inactivation of Glucagon-like Peptide-1 (GLP-1) / Sensory perception of sweet, bitter, and umami (glutamate) taste / photoreceptor disc membrane / Adrenaline,noradrenaline inhibits insulin secretion / Glucagon-type ligand receptors / Vasopressin regulates renal water homeostasis via Aquaporins / G alpha (z) signalling events / cellular response to catecholamine stimulus / Glucagon-like Peptide-1 (GLP1) regulates insulin secretion / ADORA2B mediated anti-inflammatory cytokines production / sensory perception of taste / ADP signalling through P2Y purinoceptor 1 / adenylate cyclase-activating dopamine receptor signaling pathway / G beta:gamma signalling through PI3Kgamma / cellular response to prostaglandin E stimulus / Cooperation of PDCL (PhLP1) and TRiC/CCT in G-protein beta folding / GPER1 signaling / GDP binding / G-protein beta-subunit binding / Inactivation, recovery and regulation of the phototransduction cascade / heterotrimeric G-protein complex / G alpha (12/13) signalling events / extracellular vesicle / signaling receptor complex adaptor activity / Thrombin signalling through proteinase activated receptors (PARs) / GTPase binding / retina development in camera-type eye / phospholipase C-activating G protein-coupled receptor signaling pathway / Ca2+ pathway / cell cortex / midbody / G alpha (i) signalling events / fibroblast proliferation / G alpha (s) signalling events / G alpha (q) signalling events / cell population proliferation / Ras protein signal transduction / Extra-nuclear estrogen signaling / inflammatory response / cell cycle / immune response / G protein-coupled receptor signaling pathway / cell division / lysosomal membrane / nucleotide binding / GTPase activity / centrosome / synapse / protein-containing complex binding / nucleolus / GTP binding / magnesium ion binding / signal transduction / extracellular exosome / nucleoplasm / membrane / plasma membrane / cytoplasm / cytosol 類似検索 - 分子機能 | ||||||
生物種 | Homo sapiens (ヒト) | ||||||
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: 2.9 Å | ||||||
データ登録者 | He, Y. / Wang, N. | ||||||
資金援助 | 中国, 1件
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引用 | ジャーナル: Nat Commun / 年: 2022 タイトル: Structural basis of leukotriene B4 receptor 1 activation. 著者: Na Wang / Xinheng He / Jing Zhao / Hualiang Jiang / Xi Cheng / Yu Xia / H Eric Xu / Yuanzheng He / 要旨: Leukotriene B4 receptor 1 (BLT1) plays crucial roles in the acute inflammatory responses and is a valuable target for anti-inflammation treatment, however, the mechanism by which leukotriene B4 (LTB4) ...Leukotriene B4 receptor 1 (BLT1) plays crucial roles in the acute inflammatory responses and is a valuable target for anti-inflammation treatment, however, the mechanism by which leukotriene B4 (LTB4) activates receptor remains unclear. Here, we report the cryo-electron microscopy (cryo-EM) structure of the LTB4 -bound human BLT1 in complex with a G protein in an active conformation at resolution of 2.91 Å. In combination of molecule dynamics (MD) simulation, docking and site-directed mutagenesis, our structure reveals that a hydrogen-bond network of water molecules and key polar residues is the key molecular determinant for LTB4 binding. We also find that the displacement of residues M101 and I271 to the center of receptor, which unlock the ion lock of the lower part of pocket, is the key mechanism of receptor activation. In addition, we reveal a binding site of phosphatidylinositol (PI) and discover that the widely open ligand binding pocket may contribute the lack of specificity and efficacy for current BLT1-targeting drug design. Taken together, our structural analysis provides a scaffold for understanding BLT1 activation and a rational basis for designing anti-leukotriene drugs. | ||||||
履歴 |
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-構造の表示
ムービー |
ムービービューア |
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構造ビューア | 分子: MolmilJmol/JSmol |
-ダウンロードとリンク
-ダウンロード
PDBx/mmCIF形式 | 7vkt.cif.gz | 212.8 KB | 表示 | PDBx/mmCIF形式 |
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PDB形式 | pdb7vkt.ent.gz | 172.8 KB | 表示 | PDB形式 |
PDBx/mmJSON形式 | 7vkt.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 | 7vkt_validation.pdf.gz | 1.1 MB | 表示 | wwPDB検証レポート |
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文書・詳細版 | 7vkt_full_validation.pdf.gz | 1.1 MB | 表示 | |
XML形式データ | 7vkt_validation.xml.gz | 42.5 KB | 表示 | |
CIF形式データ | 7vkt_validation.cif.gz | 63.9 KB | 表示 | |
アーカイブディレクトリ | https://data.pdbj.org/pub/pdb/validation_reports/vk/7vkt ftp://data.pdbj.org/pub/pdb/validation_reports/vk/7vkt | HTTPS FTP |
-関連構造データ
-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 BCD
#2: タンパク質 | 分子量: 40414.047 Da / 分子数: 1 / 変異: S47N/G203A/E245A/A326S / 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: Insect BA phytoplasma (バクテリア) / 参照: UniProt: P63096 |
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#3: タンパク質 | 分子量: 37915.496 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: GNB1 / 発現宿主: Insect BA phytoplasma (バクテリア) / 参照: UniProt: P62873 |
#4: 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) Homo sapiens (ヒト) / 遺伝子: GNG2 / 発現宿主: Insect BA phytoplasma (バクテリア) / 参照: UniProt: P59768 |
-タンパク質 / 抗体 , 2種, 2分子 AE
#1: タンパク質 | 分子量: 37740.496 Da / 分子数: 1 / 変異: L106W/A196I/C287F/S310A / 由来タイプ: 組換発現 / 由来: (組換発現) Homo sapiens (ヒト) / 遺伝子: LTB4R, BLT, BLT1, BLTR, CMKRL1, GPR16, P2RY7 / 発現宿主: Insect BA phytoplasma (バクテリア) / 参照: UniProt: Q15722 |
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#5: 抗体 | 分子量: 26277.299 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: Insect BA phytoplasma (バクテリア) |
-非ポリマー , 4種, 13分子
#6: 化合物 | ChemComp-LTB / | ||||
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#7: 化合物 | ChemComp-Y01 / #8: 化合物 | ChemComp-8IO / [( | #9: 水 | ChemComp-HOH / | |
-詳細
研究の焦点であるリガンドがあるか | N |
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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: 3D ARRAY / 3次元再構成法: 単粒子再構成法 |
-試料調製
構成要素 | 名称: BLT1/Gi complex / タイプ: COMPLEX / Entity ID: #1-#5 / 由来: RECOMBINANT |
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由来(天然) | 生物種: Homo sapiens (ヒト) |
由来(組換発現) | 生物種: Insect BA phytoplasma (バクテリア) |
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 |
-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: OTHER |
電子レンズ | モード: BRIGHT FIELD / 最大 デフォーカス(公称値): 2300 nm / 最小 デフォーカス(公称値): 1200 nm |
撮影 | 電子線照射量: 60 e/Å2 フィルム・検出器のモデル: GATAN K2 SUMMIT (4k x 4k) |
EM回折 | カメラ長: 800 mm |
EM回折 シェル | 解像度: 3→5.5 Å / フーリエ空間範囲: 93.2 % / 多重度: 2.5 / 構造因子数: 244 / 位相残差: 13.5 ° |
EM回折 統計 | フーリエ空間範囲: 90.3 % / 再高解像度: 2.83 Å / 測定した強度の数: 1590 / 構造因子数: 325 / 位相誤差の除外基準: 20 / Rmerge: 0.198 |
-解析
ソフトウェア | 名称: PHENIX / バージョン: 1.18.2_3874: / 分類: 精密化 | ||||||||||||||||||||||||
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EMソフトウェア |
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CTF補正 | タイプ: NONE | ||||||||||||||||||||||||
3次元再構成 | 解像度: 2.9 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 450000 / 対称性のタイプ: POINT | ||||||||||||||||||||||||
原子モデル構築 | プロトコル: OTHER / 空間: REAL | ||||||||||||||||||||||||
原子モデル構築 | PDB-ID: 6VMS PDB chain-ID: A | ||||||||||||||||||||||||
拘束条件 |
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