Naturally acquired blocking human monoclonal antibodies to Plasmodium vivax reticulocyte binding protein 2b
Publication Year 2021-03-09, Volume 12, Issue #1, Page 1538
Journal Title
Nature Communications
Plasmodium vivax preferentially invades reticulocytes and recognition of these cells is mediated by P. vivax Reticulocyte Binding Protein 2b (PvRBP2b) binding to human Transferrin receptor 1 (TfR1) and Transferrin (Tf). Longitudinal cohort studies in Papua New Guinea, Thailand and Brazil show that PvRBP2b antibodies are correlated with protection against P. vivax infection and disease. Here, we isolate and characterize anti-PvRBP2b human monoclonal antibodies from two individuals in Cambodia with natural P. vivax infection. These antibodies bind with high affinities and map to different regions of PvRBP2b. Several human antibodies block PvRBP2b binding to reticulocytes and inhibit complex formation with human TfR1-Tf. We describe different structural mechanisms for functional inhibition, including either steric hindrance with TfR1-Tf or the reticulocyte membrane. These results show that naturally acquired human antibodies against PvRBP2b can inhibit its function which is important for P. vivax invasion.
WEHI Research Division(s)
Infectious Diseases And Immune Defence; Population Health And Immunity
PubMed ID
Open Access at Publisher's Site
Rights Notice
Refer to copyright notice on published article.

Creation Date: 2021-03-26 10:28:21
Last Modified: 2021-03-26 10:44:17
An error has occurred. This application may no longer respond until reloaded. Reload 🗙