TY - JOUR
T1 - Plasmodium falciparum-CD36 Structure-Function Relationships Defined by Ortholog Scanning Mutagenesis
AU - Cabrera, Ana
AU - Neculai, Dante
AU - Tran, Vanessa
AU - Lavstsen, Thomas
AU - Turner, Louise
AU - Kain, Kevin C
N1 - © The Author(s) 2018. Published by Oxford University Press for the Infectious Diseases Society of America. All rights reserved. For permissions, e-mail: [email protected].
PY - 2019/2/23
Y1 - 2019/2/23
N2 - BACKGROUND: The interaction of Plasmodium falciparum-infected erythrocytes (IEs) with the host receptor CD36 is among the most studied host-parasite interfaces. CD36 is a scavenger receptor that binds numerous ligands including the cysteine-rich interdomain region (CIDR)α domains of the erythrocyte membrane protein 1 family (PfEMP1) expressed on the surface of IEs. CD36 is conserved across species, but orthologs display differential binding of IEs.METHODS: In this study, we exploited these differences, combined with the recent crystal structure and 3-dimensional modeling of CD36, to investigate malaria-CD36 structure-function relationships and further define IE-CD36 binding interactions.RESULTS: We show that a charged surface in the membrane-distal region of CD36 is necessary for IE binding. Moreover, IE interaction with this binding surface is influenced by additional CD36 domains, both proximal to and at a distance from this site.CONCLUSIONS: Our data indicate that subtle sequence and spatial differences in these domains modify receptor conformation and regulate the ability of CD36 to selectively interact with its diverse ligands.
AB - BACKGROUND: The interaction of Plasmodium falciparum-infected erythrocytes (IEs) with the host receptor CD36 is among the most studied host-parasite interfaces. CD36 is a scavenger receptor that binds numerous ligands including the cysteine-rich interdomain region (CIDR)α domains of the erythrocyte membrane protein 1 family (PfEMP1) expressed on the surface of IEs. CD36 is conserved across species, but orthologs display differential binding of IEs.METHODS: In this study, we exploited these differences, combined with the recent crystal structure and 3-dimensional modeling of CD36, to investigate malaria-CD36 structure-function relationships and further define IE-CD36 binding interactions.RESULTS: We show that a charged surface in the membrane-distal region of CD36 is necessary for IE binding. Moreover, IE interaction with this binding surface is influenced by additional CD36 domains, both proximal to and at a distance from this site.CONCLUSIONS: Our data indicate that subtle sequence and spatial differences in these domains modify receptor conformation and regulate the ability of CD36 to selectively interact with its diverse ligands.
KW - Animals
KW - Antigens, Protozoan/metabolism
KW - Binding Sites
KW - CD36 Antigens/chemistry
KW - CHO Cells
KW - COS Cells
KW - Chlorocebus aethiops
KW - Cricetulus
KW - Erythrocytes/parasitology
KW - Host-Parasite Interactions/genetics
KW - Humans
KW - Malaria, Falciparum/immunology
KW - Mutagenesis
KW - Plasmodium falciparum/immunology
KW - Structure-Activity Relationship
U2 - 10.1093/infdis/jiy607
DO - 10.1093/infdis/jiy607
M3 - Journal article
C2 - 30335152
SN - 0022-1899
VL - 219
SP - 945
EP - 954
JO - The Journal of infectious diseases
JF - The Journal of infectious diseases
IS - 6
ER -