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データを開く
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基本情報
| 登録情報 | ![]() | |||||||||
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| タイトル | Cryo-EM Structure of CXCL1-KSHV ORF74-Gi-scFv16 Complex | |||||||||
マップデータ | Cryo-EM Structure of CXCL1-KSHV ORF74-Gi-scFv16 Complex | |||||||||
試料 |
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キーワード | KSHV vGPCR / Viral GPCR / KSHV ORF74 / ORF74-CXCL1 / ORF74 Active / CXCL1 bound ORF74 / KSHV ORF74-CXCL1-Gi-scFv16 / VIRAL PROTEIN / VIRAL PROTEIN-SIGNALING PROTEIN complex | |||||||||
| 機能・相同性 | 機能・相同性情報C-C chemokine receptor activity / C-C chemokine binding / chemokine activity / Chemokine receptors bind chemokines / Interleukin-10 signaling / adenylate cyclase inhibitor activity / positive regulation of protein localization to cell cortex / T cell migration / positive regulation of relaxation of smooth muscle / Adenylate cyclase inhibitory pathway ...C-C chemokine receptor activity / C-C chemokine binding / chemokine activity / Chemokine receptors bind chemokines / Interleukin-10 signaling / adenylate cyclase inhibitor activity / positive regulation of protein localization to cell cortex / T cell migration / positive regulation of relaxation of smooth muscle / Adenylate cyclase inhibitory pathway / D2 dopamine receptor binding / adenylate cyclase-inhibiting serotonin receptor signaling pathway / G protein-coupled serotonin receptor binding / cellular response to forskolin / regulation of mitotic spindle organization / chemokine-mediated signaling pathway / growth factor activity / cell chemotaxis / Regulation of insulin secretion / neuropeptide signaling pathway / calcium-mediated signaling / response to prostaglandin E / positive regulation of cholesterol biosynthetic process / negative regulation of insulin secretion / G protein-coupled receptor binding / response to peptide hormone / specific granule lumen / adenylate cyclase-modulating G protein-coupled receptor signaling pathway / enzyme activator activity / G-protein beta/gamma-subunit complex binding / centriolar satellite / chemotaxis / adenylate cyclase-inhibiting G protein-coupled receptor signaling pathway / Olfactory Signaling Pathway / Activation of the phototransduction cascade / G protein-coupled acetylcholine receptor signaling pathway / G beta:gamma signalling through PLC beta / Presynaptic function of Kainate receptors / Thromboxane signalling through TP receptor / Activation of G protein gated Potassium channels / Inhibition of voltage gated Ca2+ channels via Gbeta/gamma subunits / G-protein activation / Glucagon signaling in metabolic regulation / G beta:gamma signalling through CDC42 / Prostacyclin signalling through prostacyclin receptor / G beta:gamma signalling through BTK / Synthesis, secretion, and inactivation of Glucagon-like Peptide-1 (GLP-1) / photoreceptor disc membrane / tertiary granule lumen / ADP signalling through P2Y purinoceptor 12 / Sensory perception of sweet, bitter, and umami (glutamate) taste / GDP binding / 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 / cellular response to catecholamine stimulus / ADP signalling through P2Y purinoceptor 1 / ADORA2B mediated anti-inflammatory cytokines production / G beta:gamma signalling through PI3Kgamma / nervous system development / adenylate cyclase-activating dopamine receptor signaling pathway / Cooperation of PDCL (PhLP1) and TRiC/CCT in G-protein beta folding / GPER1 signaling / cellular response to prostaglandin E stimulus / heterotrimeric G-protein complex / G alpha (12/13) signalling events / Inactivation, recovery and regulation of the phototransduction cascade / G-protein beta-subunit binding / extracellular vesicle / sensory perception of taste / adenylate cyclase-activating G protein-coupled receptor signaling pathway / sperm principal piece / Thrombin signalling through proteinase activated receptors (PARs) / signaling receptor complex adaptor activity / positive regulation of cytosolic calcium ion concentration / retina development in camera-type eye / actin cytoskeleton organization / GTPase binding / G protein activity / fibroblast proliferation / Ca2+ pathway / midbody / cell cortex / 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 / 加水分解酵素; 酸無水物に作用; GTPに作用・細胞または細胞小器官の運動に関与 / Ras protein signal transduction / cell population proliferation / Extra-nuclear estrogen signaling / intracellular signal transduction / immune response / ciliary basal body / G protein-coupled receptor signaling pathway / inflammatory response / negative regulation of cell population proliferation 類似検索 - 分子機能 | |||||||||
| 生物種 | Homo sapiens (ヒト) / ![]() Human gammaherpesvirus 8 (ヘルペスウイルス) / ![]() | |||||||||
| 手法 | 単粒子再構成法 / クライオ電子顕微鏡法 / 解像度: 2.98 Å | |||||||||
データ登録者 | Sahoo B / Seo HD / Dai X / Jung J | |||||||||
| 資金援助 | 米国, 1件
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引用 | ジャーナル: Nat Commun / 年: 2025タイトル: Structural basis for ligand promiscuity and high signaling activity of Kaposi's Sarcoma-associated Herpesvirus-encoded GPCR. 著者: Jun Bae Park / Bibekananda Sahoo / Amita Rani Sahoo / Dokyun Kim / Hogyu David Seo / James Bowman / Mi-Jeong Kwak / Sophia Suh / Matthias Buck / Xinghong Dai / Jae U Jung / ![]() 要旨: Kaposi's Sarcoma-associated Herpesvirus encodes ORF74, a viral G protein-coupled receptor homologous to CXCR2, which plays a crucial role in Kaposi's Sarcoma development through its high basal ...Kaposi's Sarcoma-associated Herpesvirus encodes ORF74, a viral G protein-coupled receptor homologous to CXCR2, which plays a crucial role in Kaposi's Sarcoma development through its high basal signaling activity. Our cryoEM analysis of ORF74 in ligand-free, BRIL-fused ligand-free, and CXCL1/Gi-bound forms elucidates its ligand-independent signaling activity. A widely open, static extracellular cavity facilitates ligand promiscuity by enabling dynamic access and diverse binding modes. Structural alterations in CWxP, E/DRY, and NPxxY micro-switches stabilize the active conformation, leading to constitutive signaling. Metadynamics simulations reveal a dynamic ensemble between local switch structures corresponding to the inactive and active states, supporting spontaneous activation. CXCR2-ORF74 chimeras highlight intracellular loops 2 and 3 as key modulators of basal and agonist-induced activity. This study defines the structural basis of ORF74's ligand promiscuity, spontaneous activation, and high basal signaling, providing insights into its role in viral oncogenesis. | |||||||||
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構造の表示
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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 | emd_48100.map.gz | 29.5 MB | EMDBマップデータ形式 | |
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| ヘッダ (付随情報) | emd-48100-v30.xml emd-48100.xml | 24 KB 24 KB | 表示 表示 | EMDBヘッダ |
| 画像 | emd_48100.png | 29.9 KB | ||
| Filedesc metadata | emd-48100.cif.gz | 7.5 KB | ||
| アーカイブディレクトリ | http://ftp.pdbj.org/pub/emdb/structures/EMD-48100 ftp://ftp.pdbj.org/pub/emdb/structures/EMD-48100 | HTTPS FTP |
-関連構造データ
| 関連構造データ | ![]() 9ejcMC ![]() 8w1aC C: 同じ文献を引用 ( M: このマップから作成された原子モデル |
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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
| EMDBのページ | EMDB (EBI/PDBe) / EMDataResource |
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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 | ダウンロード / ファイル: emd_48100.map.gz / 形式: CCP4 / 大きさ: 181 MB / タイプ: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) | ||||||||||||||||||||||||||||||||||||
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| 注釈 | Cryo-EM Structure of CXCL1-KSHV ORF74-Gi-scFv16 Complex | ||||||||||||||||||||||||||||||||||||
| 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: 0.66 Å | ||||||||||||||||||||||||||||||||||||
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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 : Cryo-EM Structure of CXCL1-KSHV ORF74-Gi-scFv16 Complex
+超分子 #1: Cryo-EM Structure of CXCL1-KSHV ORF74-Gi-scFv16 Complex
+超分子 #2: Gi protein
+超分子 #3: KSHV ORF74
+超分子 #4: CXCL1
+超分子 #5: scFv16
+分子 #1: Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1
+分子 #2: Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2
+分子 #3: viral G-protein coupled receptor
+分子 #4: Growth-regulated alpha protein
+分子 #5: Guanine nucleotide-binding protein G(i) subunit alpha-1
+分子 #6: scFv Recombinant Mouse Monoclonal Antibody (scFv16)
-実験情報
-構造解析
| 手法 | クライオ電子顕微鏡法 |
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解析 | 単粒子再構成法 |
| 試料の集合状態 | particle |
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試料調製
| 濃度 | 10 mg/mL |
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| 緩衝液 | pH: 7.5 / 構成要素 - 濃度: 10.0 mM / 構成要素 - 式: C8H18N2O4S / 構成要素 - 名称: HPEPS 詳細: 10 mM HEPES pH 7.5, 150 mM NaCl, 0.001% (w/v) LMNG, 0.0001% (w/v) CHS, 0.001% (w/v) GDN |
| 凍結 | 凍結剤: ETHANE / チャンバー内湿度: 100 % / チャンバー内温度: 278 K / 装置: FEI VITROBOT MARK IV |
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電子顕微鏡法
| 顕微鏡 | TFS KRIOS |
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| 撮影 | フィルム・検出器のモデル: GATAN K3 BIOQUANTUM (6k x 4k) 平均電子線量: 50.0 e/Å2 |
| 電子線 | 加速電圧: 300 kV / 電子線源: FIELD EMISSION GUN |
| 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): 1.5 µm / 最小 デフォーカス(公称値): 0.8 µm |
| 実験機器 | ![]() モデル: Titan Krios / 画像提供: FEI Company |
ムービー
コントローラー
万見について




キーワード
Homo sapiens (ヒト)
Human gammaherpesvirus 8 (ヘルペスウイルス)
データ登録者
米国, 1件
引用



































Z (Sec.)
Y (Row.)
X (Col.)




















Trichoplusia ni (イラクサキンウワバ)
解析
FIELD EMISSION GUN
