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データを開く
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基本情報
| 登録情報 | データベース: PDB / ID: 9ejc | |||||||||||||||
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| タイトル | Cryo-EM Structure of CXCL1-KSHV ORF74-Gi-scFv16 Complex | |||||||||||||||
要素 |
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キーワード | VIRAL PROTEIN/SIGNALING PROTEIN / 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 / Adenylate cyclase inhibitory pathway / T cell migration / D2 dopamine receptor binding ...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 / Adenylate cyclase inhibitory pathway / T cell migration / D2 dopamine receptor binding / response to prostaglandin E / adenylate cyclase regulator activity / G protein-coupled serotonin receptor binding / adenylate cyclase-inhibiting serotonin receptor signaling pathway / cellular response to forskolin / regulation of mitotic spindle organization / cell chemotaxis / Regulation of insulin secretion / growth factor activity / enzyme activator activity / positive regulation of cholesterol biosynthetic process / calcium-mediated signaling / 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 / G-protein beta/gamma-subunit complex binding / centriolar satellite / Olfactory Signaling Pathway / Activation of the phototransduction cascade / specific granule lumen / 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 / chemotaxis / 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 / GDP binding / 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 / Cooperation of PDCL (PhLP1) and TRiC/CCT in G-protein beta folding / adenylate cyclase-activating dopamine receptor signaling pathway / tertiary granule lumen / 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 / nervous system development / 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 / G protein activity / positive regulation of cytosolic calcium ion concentration / GTPase binding / Ca2+ pathway / actin cytoskeleton organization / fibroblast proliferation / midbody / High laminar flow shear stress activates signaling by PIEZO1 and PECAM1:CDH5:KDR in endothelial cells / cell cortex / 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 / Extra-nuclear estrogen signaling / cell population proliferation / intracellular signal transduction / immune response / ciliary basal body / G protein-coupled receptor signaling pathway / inflammatory response / signaling receptor binding / negative regulation of cell population proliferation / lysosomal membrane / cell division / GTPase activity 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 | 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: 2.98 Å | |||||||||||||||
データ登録者 | Sahoo, B. / Seo, H.D. / 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. | |||||||||||||||
| 履歴 |
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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 | 9ejc.cif.gz | 254 KB | 表示 | PDBx/mmCIF形式 |
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| PDB形式 | pdb9ejc.ent.gz | 195.5 KB | 表示 | PDB形式 |
| PDBx/mmJSON形式 | 9ejc.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 | 9ejc_validation.pdf.gz | 821 KB | 表示 | wwPDB検証レポート |
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| 文書・詳細版 | 9ejc_full_validation.pdf.gz | 825.8 KB | 表示 | |
| XML形式データ | 9ejc_validation.xml.gz | 35.6 KB | 表示 | |
| CIF形式データ | 9ejc_validation.cif.gz | 55.4 KB | 表示 | |
| アーカイブディレクトリ | https://data.pdbj.org/pub/pdb/validation_reports/ej/9ejc ftp://data.pdbj.org/pub/pdb/validation_reports/ej/9ejc | HTTPS FTP |
-関連構造データ
| 関連構造データ | ![]() 48100MC ![]() 8w1aC C: 同じ文献を引用 ( M: このデータのモデリングに利用したマップデータ |
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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 BCA
| #1: タンパク質 | 分子量: 39660.293 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: Trichoplusia ni (イラクサキンウワバ) / 参照: UniProt: P62873 |
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| #2: 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: Trichoplusia ni (イラクサキンウワバ) / 参照: UniProt: P59768 |
| #5: タンパク質 | 分子量: 40415.031 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: Trichoplusia ni (イラクサキンウワバ)参照: UniProt: P63096, 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 |
-タンパク質 , 2種, 2分子 EF
| #3: タンパク質 | 分子量: 39601.523 Da / 分子数: 1 / Mutation: G30C, L169W, L258V / 由来タイプ: 組換発現 由来: (組換発現) ![]() Human gammaherpesvirus 8 (ヘルペスウイルス)遺伝子: ORF74 発現宿主: ![]() 参照: UniProt: Q98146 |
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| #4: タンパク質 | 分子量: 10131.754 Da / 分子数: 1 / Mutation: N22C / 由来タイプ: 組換発現 / 由来: (組換発現) Homo sapiens (ヒト) / 遺伝子: CXCL1, GRO, GRO1, GROA, MGSA, SCYB1発現宿主: ![]() 参照: UniProt: P09341 |
-抗体 , 1種, 1分子 D
| #6: 抗体 | 分子量: 30895.527 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() ![]() |
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-詳細
| Has protein modification | Y |
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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: 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 |
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| 分子量 | 値: 0.14 MDa / 実験値: NO | ||||||||||||||||||||||||||||||||||||
| 由来(天然) |
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| 由来(組換発現) |
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| 緩衝液 | pH: 7.5 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 | ||||||||||||||||||||||||||||||||||||
| 緩衝液成分 | 濃度: 10 mM / 名称: HPEPS / 式: C8H18N2O4S | ||||||||||||||||||||||||||||||||||||
| 試料 | 濃度: 10 mg/ml / 包埋: NO / シャドウイング: NO / 染色: NO / 凍結: YES | ||||||||||||||||||||||||||||||||||||
| 急速凍結 | 装置: FEI VITROBOT MARK IV / 凍結剤: ETHANE / 湿度: 100 % / 凍結前の試料温度: 278 K |
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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: TFS KRIOS |
| 電子銃 | 電子線源: FIELD EMISSION GUN / 加速電圧: 300 kV / 照射モード: FLOOD BEAM |
| 電子レンズ | モード: BRIGHT FIELD / 最大 デフォーカス(公称値): 1500 nm / 最小 デフォーカス(公称値): 800 nm |
| 撮影 | 電子線照射量: 50 e/Å2 フィルム・検出器のモデル: GATAN K3 BIOQUANTUM (6k x 4k) |
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解析
| EMソフトウェア | 名称: PHENIX / カテゴリ: モデル精密化 | ||||||||||||||||||||||||
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| CTF補正 | タイプ: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||
| 3次元再構成 | 解像度: 2.98 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 190755 / 対称性のタイプ: POINT | ||||||||||||||||||||||||
| 精密化 | 最高解像度: 2.98 Å 立体化学のターゲット値: REAL-SPACE (WEIGHTED MAP SUM AT ATOM CENTERS) | ||||||||||||||||||||||||
| 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)
Human gammaherpesvirus 8 (ヘルペスウイルス)

米国, 1件
引用






PDBj































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