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- W2012056519 abstract "Plasmodium vivax and P. knowlesi use the Duffy antigen as a receptor to invade human erythrocytes. Duffy-binding ligands belong to a family of erythrocyte-binding proteins that bind erythrocyte receptors to mediate invasion. Receptor-binding domains in erythrocyte-binding proteins lie in conserved cysteine-rich regions called Duffy-binding-like domains. In the present study, we report an analysis of the overall three-dimensional architecture of P. vivax and P. knowlesi Duffy-binding domains based on mild proteolysis and supportive-functional assays. Our proteolysis experiments indicate that these domains are built of two distinct subdomains. The N-terminal region from Cys-1-4 (C1-C4) forms a stable non-functional subdomain. The region spanning C5-C12 forms another subdomain, which is capable of binding Duffy antigen. These subdomains are joined by a protease-sensitive linker. Results from deletion constructs, designed for expression of truncated proteins on COS cell surface, show that regions containing C5-C8 of the Duffy-binding domains are sufficient for the binding receptor. Therefore the central region of Duffy-binding domains, which is flanked by two non-functional regions, is responsible for receptor recognition. Moreover, the minimal Duffy-binding region identified here is capable of folding into a functionally competent module. These studies pave the way for understanding the architecture of Duffy-binding domains and their interactions with host receptors." @default.
- W2012056519 created "2016-06-24" @default.
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- W2012056519 date "2003-08-15" @default.
- W2012056519 modified "2023-09-30" @default.
- W2012056519 title "Definition of structural elements in Plasmodium vivax and P. knowlesi Duffy-binding domains necessary for erythrocyte invasion" @default.
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- W2012056519 doi "https://doi.org/10.1042/bj20030622" @default.
- W2012056519 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/1223586" @default.
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