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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: 9meu | |||||||||||||||||||||
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| タイトル | CXCR4 tetramer bound to 4 CXCL12 dimers | |||||||||||||||||||||
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キーワード | SIGNALING PROTEIN / CXCR4 / CXCL12 | |||||||||||||||||||||
| 機能・相同性 | 機能・相同性情報telencephalon cell migration / chemokine (C-X-C motif) ligand 12 signaling pathway / C-X-C motif chemokine 12 receptor activity / response to ultrasound / negative regulation of leukocyte tethering or rolling / regulation of actin polymerization or depolymerization / positive regulation of macrophage migration inhibitory factor signaling pathway / myosin light chain binding / CXCL12-activated CXCR4 signaling pathway / Specification of primordial germ cells ...telencephalon cell migration / chemokine (C-X-C motif) ligand 12 signaling pathway / C-X-C motif chemokine 12 receptor activity / response to ultrasound / negative regulation of leukocyte tethering or rolling / regulation of actin polymerization or depolymerization / positive regulation of macrophage migration inhibitory factor signaling pathway / myosin light chain binding / CXCL12-activated CXCR4 signaling pathway / Specification of primordial germ cells / chemokine receptor binding / myelin maintenance / positive regulation of axon extension involved in axon guidance / Developmental Lineage of Multipotent Pancreatic Progenitor Cells / CXCR chemokine receptor binding / C-X-C chemokine receptor activity / positive regulation of vasculature development / Signaling by ROBO receptors / induction of positive chemotaxis / negative regulation of dendritic cell apoptotic process / Formation of definitive endoderm / integrin activation / positive regulation of dopamine secretion / negative regulation of intrinsic apoptotic signaling pathway in response to DNA damage / cellular response to chemokine / C-C chemokine receptor activity / C-C chemokine binding / positive regulation of monocyte chemotaxis / anchoring junction / chemokine activity / blood circulation / Chemokine receptors bind chemokines / dendritic cell chemotaxis / positive regulation of calcium ion import / cellular response to cytokine stimulus / detection of temperature stimulus involved in sensory perception of pain / cell leading edge / positive regulation of oligodendrocyte differentiation / animal organ regeneration / Binding and entry of HIV virion / detection of mechanical stimulus involved in sensory perception of pain / positive regulation of T cell migration / Nuclear signaling by ERBB4 / regulation of cell adhesion / coreceptor activity / positive regulation of endothelial cell proliferation / positive regulation of neuron differentiation / neurogenesis / positive regulation of cell adhesion / axon guidance / chemokine-mediated signaling pathway / adult locomotory behavior / growth factor activity / cell chemotaxis / ubiquitin binding / calcium-mediated signaling / defense response / brain development / response to peptide hormone / integrin binding / G protein-coupled receptor activity / neuron migration / response to virus / chemotaxis / adenylate cyclase-inhibiting G protein-coupled receptor signaling pathway / intracellular calcium ion homeostasis / late endosome / positive regulation of cold-induced thermogenesis / virus receptor activity / positive regulation of cytosolic calcium ion concentration / extracellular matrix / actin binding / cytoplasmic vesicle / Estrogen-dependent gene expression / G alpha (i) signalling events / response to hypoxia / early endosome / lysosome / cell adhesion / immune response / positive regulation of cell migration / G protein-coupled receptor signaling pathway / inflammatory response / signaling receptor binding / external side of plasma membrane / apoptotic process / ubiquitin protein ligase binding / cell surface / signal transduction / protein-containing complex / : / extracellular exosome / extracellular region / membrane / plasma membrane / cytoplasm 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: 3.46 Å | |||||||||||||||||||||
データ登録者 | Zhang, Z. / Patel, D.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: CXCR4 mediated recognition of HIV envelope spike and inhibition by CXCL12. 著者: Zhiying Zhang / Hongwei Zhang / Lyuqin Zheng / Shihua Chen / Shuo Du / Junyu Xiao / Dinshaw J Patel / ![]() 要旨: CCR5 and CXCR4 both act as HIV co-receptors, though CXCR4 is less explored. CXCR4 binds the chemokine CXCL12 to regulate cellular processes and mediate HIV entry, a process that CXCL12 inhibits. ...CCR5 and CXCR4 both act as HIV co-receptors, though CXCR4 is less explored. CXCR4 binds the chemokine CXCL12 to regulate cellular processes and mediate HIV entry, a process that CXCL12 inhibits. Using cryo-EM, we investigate HIV-2 envelope (Env) spike recognition by CXCR4 and how CXCL12 inhibit this interaction. We discover that CXCR4 unexpected forms a tetramer, both alone and in complex. It binds CXCL12 with 4:8 and 8:8 stoichiometries, with the CXCL12 N-terminus inserting into the CXCR4 pocket. Structures of CXCR4-gp120 complex show one or two gp120 molecules per CXCR4 tetramer, with the V3 loop occupying the major sub-pocket of CXCR4 through deep embedment of its GFKF motif. The CXCL12 N-terminus chashes with gp120 V3 loops, explain its inhibitory effect. Docking analyses of other HIV antagonists further clarify their mechanisms. The CXCR4-gp120 model illustrate how V3 loop residues define co-receptor specificity, offering insights into co-receptor switching and therapeutic design. | |||||||||||||||||||||
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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 | 9meu.cif.gz | 313.6 KB | 表示 | PDBx/mmCIF形式 |
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| PDB形式 | pdb9meu.ent.gz | 245.4 KB | 表示 | PDB形式 |
| PDBx/mmJSON形式 | 9meu.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/me/9meu ftp://data.pdbj.org/pub/pdb/validation_reports/me/9meu | HTTPS FTP |
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-関連構造データ
| 関連構造データ | ![]() 48220MC ![]() 9me1C ![]() 9mejC ![]() 9menC ![]() 9metC 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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| 1 |
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要素
| #1: タンパク質 | 分子量: 40784.359 Da / 分子数: 4 / 由来タイプ: 組換発現 / 由来: (組換発現) Homo sapiens (ヒト) / 遺伝子: CXCR4 / 発現宿主: Homo sapiens (ヒト) / 参照: UniProt: P61073#2: タンパク質 | 分子量: 9648.379 Da / 分子数: 8 / 由来タイプ: 組換発現 / 由来: (組換発現) Homo sapiens (ヒト) / 遺伝子: CXCL12, SDF1, SDF1A, SDF1B / 発現宿主: Homo sapiens (ヒト) / 参照: UniProt: P48061Has 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 | 名称: CXCR4 tetramer with 4 CXCL12 dimers / タイプ: COMPLEX / Entity ID: all / 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: Homo sapiens (ヒト) |
| 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: Talos Arctica / 画像提供: FEI Company |
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| 顕微鏡 | モデル: FEI TALOS ARCTICA |
| 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: DIFFRACTION / 最大 デフォーカス(公称値): 2200 nm / 最小 デフォーカス(公称値): 800 nm |
| 撮影 | 電子線照射量: 52.8 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: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||
| 3次元再構成 | 解像度: 3.46 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 181836 / 対称性のタイプ: POINT | ||||||||||||||||||||||||
| 精密化 | 最高解像度: 3.46 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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万見について




Homo sapiens (ヒト)
米国, 1件
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FIELD EMISSION GUN