ジャーナル: Nat Commun / 年: 2023 タイトル: Affinity-matured homotypic interactions induce spectrum of PfCSP structures that influence protection from malaria infection. 著者: Gregory M Martin / Jonathan L Torres / Tossapol Pholcharee / David Oyen / Yevel Flores-Garcia / Grace Gibson / Re'em Moskovitz / Nathan Beutler / Diana D Jung / Jeffrey Copps / Wen-Hsin Lee / ...著者: Gregory M Martin / Jonathan L Torres / Tossapol Pholcharee / David Oyen / Yevel Flores-Garcia / Grace Gibson / Re'em Moskovitz / Nathan Beutler / Diana D Jung / Jeffrey Copps / Wen-Hsin Lee / Gonzalo Gonzalez-Paez / Daniel Emerling / Randall S MacGill / Emily Locke / C Richter King / Fidel Zavala / Ian A Wilson / Andrew B Ward / 要旨: The generation of high-quality antibody responses to Plasmodium falciparum (Pf) circumsporozoite protein (PfCSP), the primary surface antigen of Pf sporozoites, is paramount to the development of an ...The generation of high-quality antibody responses to Plasmodium falciparum (Pf) circumsporozoite protein (PfCSP), the primary surface antigen of Pf sporozoites, is paramount to the development of an effective malaria vaccine. Here we present an in-depth structural and functional analysis of a panel of potent antibodies encoded by the immunoglobulin heavy chain variable (IGHV) gene IGHV3-33, which is among the most prevalent and potent antibody families induced in the anti-PfCSP immune response and targets the Asn-Ala-Asn-Pro (NANP) repeat region. Cryo-electron microscopy (cryo-EM) reveals a remarkable spectrum of helical antibody-PfCSP structures stabilized by homotypic interactions between tightly packed fragments antigen binding (Fabs), many of which correlate with somatic hypermutation. We demonstrate a key role of these mutated homotypic contacts for high avidity binding to PfCSP and in protection from Pf malaria infection. Together, these data emphasize the importance of anti-homotypic affinity maturation in the frequent selection of IGHV3-33 antibodies and highlight key features underlying the potent protection of this antibody family.
#256 - 2021年4月 SARSコロナウイルス2型のスパイクと抗体 (SARS-CoV-2 Spike and Antibodies) 類似性 (1)
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I: Circumsporozoite protein H: 337 Fab heavy chain L: 337 Fab light chain A: 337 Fab heavy chain B: 337 Fab light chain C: 337 Fab heavy chain D: 337 Fab light chain E: 337 Fab heavy chain F: 337 Fab light chain M: 337 Fab heavy chain N: 337 Fab light chain O: 337 Fab heavy chain P: 337 Fab light chain Q: 337 Fab heavy chain R: 337 Fab light chain