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-Structure paper
| タイトル | Broadly inhibitory antibodies to severe malaria virulence proteins. |
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| ジャーナル・号・ページ | Nature, Vol. 636, Issue 8041, Page 182-189, Year 2024 |
| 掲載日 | 2024年11月20日 |
著者 | Raphael A Reyes / Sai Sundar Rajan Raghavan / Nicholas K Hurlburt / Viola Introini / Sebastiaan Bol / Ikhlaq Hussain Kana / Rasmus W Jensen / Elizabeth Martinez-Scholze / María Gestal-Mato / Borja López-Gutiérrez / Silvia Sanz / Cristina Bancells / Monica Lisa Fernández-Quintero / Johannes R Loeffler / James Alexander Ferguson / Wen-Hsin Lee / Greg Michael Martin / Thor G Theander / John P A Lusingu / Daniel T R Minja / Isaac Ssewanyana / Margaret E Feeney / Bryan Greenhouse / Andrew B Ward / Maria Bernabeu / Marie Pancera / Louise Turner / Evelien M Bunnik / Thomas Lavstsen / ![]() |
| PubMed 要旨 | Malaria pathology is driven by the accumulation of Plasmodium falciparum-infected erythrocytes in microvessels. This process is mediated by the polymorphic erythrocyte membrane protein 1 (PfEMP1) ...Malaria pathology is driven by the accumulation of Plasmodium falciparum-infected erythrocytes in microvessels. This process is mediated by the polymorphic erythrocyte membrane protein 1 (PfEMP1) adhesion proteins of the parasite. A subset of PfEMP1 variants that bind to human endothelial protein C receptor (EPCR) through their CIDRα1 domains is responsible for severe malaria pathogenesis. A longstanding question is whether individual antibodies can recognize the large repertoire of circulating PfEMP1 variants. Here we describe two broadly reactive and inhibitory human monoclonal antibodies to CIDRα1. The antibodies isolated from two different individuals exhibited similar and consistent EPCR-binding inhibition of diverse CIDRα1 domains, representing five of the six subclasses of CIDRα1. Both antibodies inhibited EPCR binding of both recombinant full-length and native PfEMP1 proteins, as well as parasite sequestration in bioengineered 3D human brain microvessels under physiologically relevant flow conditions. Structural analyses of the two antibodies in complex with three different CIDRα1 antigen variants reveal similar binding mechanisms that depend on interactions with three highly conserved amino acid residues of the EPCR-binding site in CIDRα1. These broadly reactive antibodies are likely to represent a common mechanism of acquired immunity to severe malaria and offer novel insights for the design of a vaccine or treatment targeting severe malaria. |
リンク | Nature / PubMed:39567685 / PubMed Central |
| 手法 | EM (単粒子) / X線回折 |
| 解像度 | 2.68 - 5.0 Å |
| 構造データ | EMDB-43148, PDB-8vdf: EMDB-43149, PDB-8vdg: ![]() EMDB-43150: Human monoclonal antibody C7 targeting HB3VAR03 (PfEMP1 A) EMDB-44539, PDB-9bhb: ![]() PDB-8vdl: |
| 化合物 | ![]() ChemComp-ZN: ![]() ChemComp-HOH: |
| 由来 |
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キーワード | IMMUNE SYSTEM / Malaria / PfEMP1 / Human monoclonal antibodies / Severe malaria. / Plasmodium falciparum / Antibody / Plasmodium / Monoclonal / Neutralizing |
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