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基本情報
登録情報 | ![]() | |||||||||
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タイトル | Cryo-EM structure of 110_C4 Fab in complex with CIDRa1.7 PfEMP1 | |||||||||
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![]() | Serum antibody / Cryo-EM / Monoclonal antibody / PfEMP1 / Malaria / IMMUNE SYSTEM | |||||||||
機能・相同性 | ![]() | |||||||||
生物種 | ![]() ![]() ![]() | |||||||||
手法 | 単粒子再構成法 / クライオ電子顕微鏡法 / 解像度: 3.4 Å | |||||||||
![]() | Raghavan SSR / Ward AB | |||||||||
資金援助 | ![]() ![]()
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![]() | ![]() タイトル: Identification of broadly inhibitory anti-PfEMP1 antibodies by mass spectrometry sequencing of plasma IgG from a malaria-exposed child. 著者: Louise Turner / Teresa Nunez de Villavicencio Diaz / Sai Sundar Rajan Raghavan / Ikhlaq Hussain Kana / Eric Lyimo / Chelsea Reitzel / Christian W Wang / Ewen Berube / Rasmus W Jensen / ...著者: Louise Turner / Teresa Nunez de Villavicencio Diaz / Sai Sundar Rajan Raghavan / Ikhlaq Hussain Kana / Eric Lyimo / Chelsea Reitzel / Christian W Wang / Ewen Berube / Rasmus W Jensen / Johannes R Loeffler / Monica Lisa Fernández-Quintero / Thor G Theander / John P A Lusingu / Thierry Le Bihan / Xiaobing Han / Daniel T R Minja / Andrew B Ward / Bin Ma / Thomas Lavstsen / ![]() ![]() ![]() 要旨: pathology is driven by the accumulation of parasite-infected erythrocytes in blood capillaries. This sequestration process is mediated by the parasite's erythrocyte membrane protein 1 (PfEMP1) ... pathology is driven by the accumulation of parasite-infected erythrocytes in blood capillaries. This sequestration process is mediated by the parasite's erythrocyte membrane protein 1 (PfEMP1) adhesins, which bind select endothelial cell receptors. A subset of PfEMP1 binding human endothelial protein C receptor (EPCR) through their cysteine-rich interdomain region alpha 1 (CIDRα1) domains drives the pathogenesis to severe malaria. Despite high sequence diversity among CIDRα1 domains, individuals living in malaria-endemic regions become immune to severe disease in part through acquisition of antibodies inhibiting the PfEMP1-EPCR interaction. Here, we demonstrate an approach to identify pathogen-specific human monoclonal antibodies from plasma, combining mass spectrometry analysis of antigen-purified polyclonal plasma IgG and Ig transcript sequencing. We identified a clonal family of broadly reactive and EPCR binding-inhibitory human monoclonal antibodies against CIDRα1. The antibodies, isolated from a 9-y-old child, exhibited potent inhibition of EPCR binding broadly across CIDRα1 domains as well as binding of infected erythrocytes to EPCR. Structural analysis of one antibody variant complexed with CIDRα1 revealed a shared epitope of the clonal antibody family overlapping the EPCR binding site and the epitopes of two previously identified monoclonal antibodies, C7 and C74, with similar functional patterns. However, although C7, C74, and 110-3 antibodies all depend on the same few residues conserved in CIDRα1 to retain EPCR binding, the 110-3 antibodies contact additional variable residues, reducing their breadth of reactivity across the CIDRα1 family. These data bolster the hypothesis that broadly inhibitory antibodies against severe malaria-associated PfEMP1 target similar epitopes and are commonly developed in malaria-exposed individuals. | |||||||||
履歴 |
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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 | ![]() | 91.4 MB | ![]() | |
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ヘッダ (付随情報) | ![]() ![]() | 18.3 KB 18.3 KB | 表示 表示 | ![]() |
FSC (解像度算出) | ![]() | 12 KB | 表示 | ![]() |
画像 | ![]() | 70.7 KB | ||
Filedesc metadata | ![]() | 6.6 KB | ||
その他 | ![]() ![]() | 165.4 MB 165.4 MB | ||
アーカイブディレクトリ | ![]() ![]() | HTTPS FTP |
-検証レポート
文書・要旨 | ![]() | 814.5 KB | 表示 | ![]() |
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文書・詳細版 | ![]() | 814.1 KB | 表示 | |
XML形式データ | ![]() | 20.4 KB | 表示 | |
CIF形式データ | ![]() | 26.7 KB | 表示 | |
アーカイブディレクトリ | ![]() ![]() | HTTPS FTP |
-関連構造データ
関連構造データ | ![]() 9naqMC M: このマップから作成された原子モデル 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 ![]() |
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リンク
EMDBのページ | ![]() ![]() |
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マップ
ファイル | ![]() | ||||||||||||||||||||
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ボクセルのサイズ | X=Y=Z: 0.725 Å | ||||||||||||||||||||
密度 |
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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 : Complex of human serum antibody 110_C4 with CIDRa1.7 PfEMP1
全体 | 名称: Complex of human serum antibody 110_C4 with CIDRa1.7 PfEMP1 |
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要素 |
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-超分子 #1: Complex of human serum antibody 110_C4 with CIDRa1.7 PfEMP1
超分子 | 名称: Complex of human serum antibody 110_C4 with CIDRa1.7 PfEMP1 タイプ: complex / ID: 1 / 親要素: 0 / 含まれる分子: all |
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由来(天然) | 生物種: ![]() |
-分子 #1: 110_C4 Fab heavy chain
分子 | 名称: 110_C4 Fab heavy chain / タイプ: protein_or_peptide / ID: 1 / コピー数: 1 / 光学異性体: LEVO |
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由来(天然) | 生物種: ![]() |
分子量 | 理論値: 13.228796 KDa |
組換発現 | 生物種: ![]() ![]() |
配列 | 文字列: QVHLVQSGAE VKKPGSSATV SCKASGGPFR GYSVSWVRQA PGQGLEWMGQ IITMLDTITY AQRFQDRVTI RADETTSTIY MELNSLRSE DTAIYYCARN GNATVGSLGM DVWGRGTTVT VSS |
-分子 #2: 110_C4 Fab light chain
分子 | 名称: 110_C4 Fab light chain / タイプ: protein_or_peptide / ID: 2 / コピー数: 1 / 光学異性体: LEVO |
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由来(天然) | 生物種: ![]() |
分子量 | 理論値: 11.888984 KDa |
組換発現 | 生物種: ![]() ![]() |
配列 | 文字列: QAGLTQPPSE SKGLRETATF TCTGNSNNVG NQGAAWLQQH QGHPPKLLSY RNNNRPSGIS ERFSASRSGN TASLTITGLQ PEDEAVYFC SAWDTSLRAW LFGGGTHLTV LG |
-分子 #3: Erythrocyte membrane protein 1
分子 | 名称: Erythrocyte membrane protein 1 / タイプ: protein_or_peptide / ID: 3 / 詳細: CIDRa1.7 PfEMP1 / コピー数: 1 / 光学異性体: LEVO |
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由来(天然) | 生物種: ![]() ![]() |
分子量 | 理論値: 138.359141 KDa |
組換発現 | 生物種: ![]() ![]() |
配列 | 文字列: MGSQSSKPSK PSVDTNESYK SARNVLERYA ESIKQQAEND ASGYEKELKG KLEEASFCGA YCELIGVPKY GSTDPCYLDH RWHTNLLHE KVKDRDPCHN RNQKRFDEGQ VYECGSGIIK GNGNNRNGGS CAPPRRRHMC DKNLEALTVA NTKNSNDLLG N ILVTAKYE ...文字列: MGSQSSKPSK PSVDTNESYK SARNVLERYA ESIKQQAEND ASGYEKELKG KLEEASFCGA YCELIGVPKY GSTDPCYLDH RWHTNLLHE KVKDRDPCHN RNQKRFDEGQ VYECGSGIIK GNGNNRNGGS CAPPRRRHMC DKNLEALTVA NTKNSNDLLG N ILVTAKYE GDSIVNSYAN SGMFNVCTAL ARSFADIGDI IRGKDLYLGN GDYKEKVSNN LRAIFNKIYE NLNDPNVKAH YQ KDAPNYY KLREHWWTVN RDQVWKAITC NAPTGADYFR KGSDGTNVFT SQGQCGHYEG APPTNLDYVP QFLRWFEEWA EEF CRKKKI KLENVKKACR DESSKLYCSH NGYDCTQTIR NKDICIRESK CTDCSTKCKL YELWLEKQEN EFKKQTKKYD KEIN GNNSL QNNKNNGIDK KYHNEFYKNF REKGYTSLDK FLKLLNEGMY CKNQKPEEED IDFTKNGDKG IFYRSEYCQV CPYCG LDCG GKTCTAKQEI YPDCVYNGAY EPPNGAETTE ITVLYSADQE GDISNKLSEF CNDENNKNSQ KWQCYYVSSE NNGCKM EKK NANHTPEVKI TKFHNFFEMW VTYLLTETIT WKDKLKTCMN NTKTADCIHE CNKNCVCFDK WVKQKEDEWN SIKKLFT KE KKMPKQYYGN INIYFESFFF HVMKKLNKEA KWNKLMDELR NKIELSKGNE GTKDLQDAIE LLLEYLKEKS TICKDNNT N EACDPTVDPT KNPCGKNTKA GSDKVISVKQ IAQYYKRLAH EQLEERGSRS ALKGDASKGT YRRQGNPRKL KKVCRIAKD HSNRNHKDSR GRHLCTSYLE FLQTIDDSHN SSNAKRVNNS FLGDVLLSAK LDAAEIIKRY KDQNNIRENI EQKDEEAMCR AVRYSFADL GDIIRGKDLW DHKDFKKLER DLVKIFGKIK DELKSKLGDK YIGDEAKSPY KQLRSDWWEA NRHQVWKAMQ C KTTTKPFS LNIKCGDTSI TPLVDYIPQR LRWMTEWAEW YCKEQSRLYG ELVEKCNTCG SSNGIVTTED CKKKCMQCKQ KC EAYKSFI EKWKKQWDEQ EKKYQELYRK ATQNGSDGSK VTADKDADVV DFLSKLRNKN DTNNLFESAA AYVHDTGNLD DCN AQNIFC EKNCDGKVND KYVFRKYPYD HAKACNCNEN VTPRPPALSN GSGSHHHHHH GSGSGLNDIF EAQKIEWHE UniProtKB: Erythrocyte membrane protein 1 |
-実験情報
-構造解析
手法 | クライオ電子顕微鏡法 |
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![]() | 単粒子再構成法 |
試料の集合状態 | particle |
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試料調製
緩衝液 | pH: 7.5 |
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凍結 | 凍結剤: ETHANE |
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電子顕微鏡法
顕微鏡 | TFS GLACIOS |
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撮影 | フィルム・検出器のモデル: FEI FALCON IV (4k x 4k) 平均電子線量: 49.0 e/Å2 |
電子線 | 加速電圧: 200 kV / 電子線源: ![]() |
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): 2.2 µm / 最小 デフォーカス(公称値): 1.0 µm |