Glycophorin C is the receptor for the Plasmodium falciparum erythrocyte binding ligand PfEBP-2 (baebl).
نویسندگان
چکیده
We report in this paper that glycophorin C (GPC) is the receptor for PfEBP-2 (baebl, EBA-140), the newly identified erythrocyte binding ligand of Plasmodium falciparum. PfEBP-2 is a member of the Duffy binding-like erythrocyte binding protein (DBL-EBP) family. Although several reports have been published characterizing PfEBP-2, the identity of its erythrocytic receptor was still unknown. Using a combination of enzymatically treated red blood cells (RBCs) and rare, variant RBCs lacking different surface proteins, we have shown that PfEBP-2 does not bind to cells lacking GPC. Additionally, we found that PfEBP-2 binds differentially to variants of GPC lacking exon 2 or exon 3, and determined that the binding domain on GPC is potentially restricted to amino acid residues 14 through 22 within exon 2. Thus PfEBP-2 is involved in a sialic acid-dependent pathway of invasion, which does not involve glycophorin A or glycophorin B and represents a novel route of entry into the RBCs.
منابع مشابه
Glycophorin C is the receptor for the Plasmodium falciparum erythrocyte binding ligand PfEBP-2 (baebl) Short title: GPC is the receptor for PfEBP-2
متن کامل
The glycophorin C N-linked glycan is a critical component of the ligand for the Plasmodium falciparum erythrocyte receptor BAEBL.
Plasmodium vivax uses a single member of the Duffy binding-like (DBL) receptor family to invade erythrocytes and is not found in West Africa where its erythrocyte ligand, the Duffy blood group antigen, is missing. In contrast, Plasmodium falciparum expresses four members of the DBL family, and remarkably, single-point mutations of two of these receptors (BAEBL and JESEBL) bind to entirely diffe...
متن کاملCharacterization of a Plasmodium falciparum erythrocyte-binding protein paralogous to EBA-175.
A member of a Plasmodium receptor family for erythrocyte invasion was identified on chromosome 13 from the Plasmodium falciparum genome sequence of the Sanger Centre (Cambridge, U.K.). The protein (named BAEBL) has homology to EBA-175, a P. falciparum receptor that binds specifically to sialic acid and the peptide backbone of glycophorin A on erythrocytes. Both EBA-175 and BAEBL localize to the...
متن کاملPolymorphisms in erythrocyte binding antigens 140 and 181 affect function and binding but not receptor specificity in Plasmodium falciparum.
Invasion of human erythrocytes by the malaria parasite Plasmodium falciparum utilizes multiple ligand-receptor interactions involving erythrocyte receptors and parasite erythrocyte binding proteins of the Duffy binding-like family. Erythrocyte binding antigen 175 (EBA-175) binds to glycophorin A, the most abundant protein on the human erythrocyte surface and EBA-140 (also known as BAEBL) binds ...
متن کاملHost Erythrocyte Engagement by PfEBA-140 1 Molecular Basis for Sialic Acid-dependent Receptor Recognition by Plasmodium falciparum Erythrocyte Binding Antigen 140/BAEBL
Background: PfEBA-140 recognizes sialic acid on its receptor Glycophorin C during erythrocyte invasion. Results: PfEBA-140 contains two sialic acid binding pockets distinct from other sialic acid binding proteins and with divergent roles in receptor recognition. Conclusion: The glycan binding pockets define receptor recognition, specificity, and putative switching. Significance: The first detai...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
- Blood
دوره 101 11 شماره
صفحات -
تاریخ انتشار 2003