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基本情報
登録情報 | データベース: PDB / ID: 6d05 | |||||||||
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タイトル | Cryo-EM structure of a Plasmodium vivax invasion complex essential for entry into human reticulocytes; two molecules of parasite ligand, subclass 2. | |||||||||
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![]() | CELL INVASION / malaria / Plasmodium vivax / reticulocyte / invasion | |||||||||
機能・相同性 | ![]() transferrin receptor activity / postsynaptic recycling endosome membrane / negative regulation of mitochondrial fusion / iron chaperone activity / transferrin transport / transferrin receptor binding / Transferrin endocytosis and recycling / positive regulation of isotype switching / basal part of cell / response to copper ion ...transferrin receptor activity / postsynaptic recycling endosome membrane / negative regulation of mitochondrial fusion / iron chaperone activity / transferrin transport / transferrin receptor binding / Transferrin endocytosis and recycling / positive regulation of isotype switching / basal part of cell / response to copper ion / Differentiation of Keratinocytes in Interfollicular Epidermis in Mammalian Skin / response to iron ion / response to manganese ion / RND1 GTPase cycle / RND2 GTPase cycle / positive regulation of cell motility / RHOB GTPase cycle / Golgi Associated Vesicle Biogenesis / RHOC GTPase cycle / RHOJ GTPase cycle / RHOQ GTPase cycle / CDC42 GTPase cycle / RHOH GTPase cycle / RHOG GTPase cycle / endocytic vesicle / RHOA GTPase cycle / RAC2 GTPase cycle / RAC3 GTPase cycle / positive regulation of bone resorption / regulation of postsynaptic membrane neurotransmitter receptor levels / transport across blood-brain barrier / response to retinoic acid / positive regulation of phosphorylation / positive regulation of T cell proliferation / clathrin-coated pit / positive regulation of B cell proliferation / RAC1 GTPase cycle / response to nutrient / ERK1 and ERK2 cascade / Hsp70 protein binding / ferric iron binding / osteoclast differentiation / cellular response to leukemia inhibitory factor / actin filament organization / basal plasma membrane / acute-phase response / cellular response to iron ion / Post-translational protein phosphorylation / positive regulation of protein-containing complex assembly / clathrin-coated endocytic vesicle membrane / Iron uptake and transport / regulation of iron ion transport / HFE-transferrin receptor complex / ferrous iron binding / regulation of protein stability / recycling endosome / receptor internalization / positive regulation of receptor-mediated endocytosis / positive regulation of protein localization to nucleus / multicellular organismal-level iron ion homeostasis / recycling endosome membrane / Regulation of Insulin-like Growth Factor (IGF) transport and uptake by Insulin-like Growth Factor Binding Proteins (IGFBPs) / antibacterial humoral response / late endosome / melanosome / positive regulation of proteasomal ubiquitin-dependent protein catabolic process / Platelet degranulation / cellular response to xenobiotic stimulus / Cargo recognition for clathrin-mediated endocytosis / extracellular vesicle / double-stranded RNA binding / Clathrin-mediated endocytosis / iron ion transport / virus receptor activity / cytoplasmic vesicle / basolateral plasma membrane / secretory granule lumen / vesicle / blood microparticle / transmembrane transporter binding / intracellular iron ion homeostasis / positive regulation of canonical NF-kappaB signal transduction / early endosome / response to hypoxia / endosome / endosome membrane / intracellular signal transduction / apical plasma membrane / endoplasmic reticulum lumen / external side of plasma membrane / intracellular membrane-bounded organelle / positive regulation of gene expression / protein-containing complex binding / negative regulation of apoptotic process / protein kinase binding / positive regulation of DNA-templated transcription / perinuclear region of cytoplasm / glutamatergic synapse / enzyme binding / cell surface 類似検索 - 分子機能 | |||||||||
生物種 | ![]() ![]() ![]() | |||||||||
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: 3.8 Å | |||||||||
![]() | Gruszczyk, J. / Huang, R.K. / Hong, C. / Yu, Z. / Tham, W.H. | |||||||||
![]() | ![]() タイトル: Cryo-EM structure of an essential Plasmodium vivax invasion complex. 著者: Jakub Gruszczyk / Rick K Huang / Li-Jin Chan / Sébastien Menant / Chuan Hong / James M Murphy / Yee-Foong Mok / Michael D W Griffin / Richard D Pearson / Wilson Wong / Alan F Cowman / ...著者: Jakub Gruszczyk / Rick K Huang / Li-Jin Chan / Sébastien Menant / Chuan Hong / James M Murphy / Yee-Foong Mok / Michael D W Griffin / Richard D Pearson / Wilson Wong / Alan F Cowman / Zhiheng Yu / Wai-Hong Tham / ![]() ![]() ![]() 要旨: Plasmodium vivax is the most widely distributed malaria parasite that infects humans. P. vivax invades reticulocytes exclusively, and successful entry depends on specific interactions between the P. ...Plasmodium vivax is the most widely distributed malaria parasite that infects humans. P. vivax invades reticulocytes exclusively, and successful entry depends on specific interactions between the P. vivax reticulocyte-binding protein 2b (PvRBP2b) and transferrin receptor 1 (TfR1). TfR1-deficient erythroid cells are refractory to invasion by P. vivax, and anti-PvRBP2b monoclonal antibodies inhibit reticulocyte binding and block P. vivax invasion in field isolates. Here we report a high-resolution cryo-electron microscopy structure of a ternary complex of PvRBP2b bound to human TfR1 and transferrin, at 3.7 Å resolution. Mutational analyses show that PvRBP2b residues involved in complex formation are conserved; this suggests that antigens could be designed that act across P. vivax strains. Functional analyses of TfR1 highlight how P. vivax hijacks TfR1, an essential housekeeping protein, by binding to sites that govern host specificity, without affecting its cellular function of transporting iron. Crystal and solution structures of PvRBP2b in complex with antibody fragments characterize the inhibitory epitopes. Our results establish a structural framework for understanding how P. vivax reticulocyte-binding protein engages its receptor and the molecular mechanism of inhibitory monoclonal antibodies, providing important information for the design of novel vaccine candidates. | |||||||||
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構造の表示
ムービー |
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構造ビューア | 分子: ![]() ![]() |
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PDBx/mmCIF形式 | ![]() | 644.2 KB | 表示 | ![]() |
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PDB形式 | ![]() | 523.1 KB | 表示 | ![]() |
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その他 | ![]() |
-検証レポート
アーカイブディレクトリ | ![]() ![]() | HTTPS FTP |
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-関連構造データ
関連構造データ | ![]() 7785MC ![]() 7783C ![]() 7784C ![]() 6bpaC ![]() 6bpbC ![]() 6bpcC ![]() 6bpdC ![]() 6bpeC ![]() 6d03C ![]() 6d04C 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 |
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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
-タンパク質 , 3種, 6分子 ABCDEF
#1: タンパク質 | 分子量: 73940.477 Da / 分子数: 2 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() 発現宿主: ![]() ![]() 参照: UniProt: P02786 #2: タンパク質 | 分子量: 77153.906 Da / 分子数: 2 / 由来タイプ: 天然 / 由来: (天然) ![]() #3: タンパク質 | 分子量: 96798.477 Da / 分子数: 2 / 由来タイプ: 組換発現 由来: (組換発現) ![]() ![]() 株: Salvador I / 遺伝子: PVX_094255 / 発現宿主: ![]() ![]() |
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-糖 , 2種, 10分子 
#4: 多糖 | 2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose #6: 糖 | ChemComp-NAG / |
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-非ポリマー , 3種, 10分子 




#5: 化合物 | #7: 化合物 | ChemComp-FE / #8: 化合物 | ChemComp-CO3 / |
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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 | 名称: ternary complex between human transferrin receptor 1, transferrin and Plasmodium vivax reticulocyte-binding protein 2b タイプ: COMPLEX / 詳細: two molecules of parasite ligand, subclass 2 / Entity ID: #1-#3 / 由来: MULTIPLE SOURCES | ||||||||||||||||
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由来(天然) | 生物種: ![]() | ||||||||||||||||
由来(組換発現) | 生物種: ![]() | ||||||||||||||||
緩衝液 | pH: 7.5 | ||||||||||||||||
緩衝液成分 |
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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: 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: ![]() |
電子レンズ | モード: BRIGHT FIELD |
撮影 | 平均露光時間: 15 sec. / 電子線照射量: 80 e/Å2 フィルム・検出器のモデル: GATAN K2 SUMMIT (4k x 4k) 撮影したグリッド数: 1 |
画像スキャン | 動画フレーム数/画像: 50 |
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解析
EMソフトウェア |
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CTF補正 | タイプ: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||
対称性 | 点対称性: C2 (2回回転対称) | ||||||||||||||||
3次元再構成 | 解像度: 3.8 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 302858 / 対称性のタイプ: POINT |