Plasmodium falciparum GWT1 acyltransferase (PfGWT1)

Plasmodium falciparum GWT1 acyltransferase (PfGWT1) is an essential enzyme located in the endoplasmic reticulum that plays a critical role in the biosynthesis of glycosylphosphatidylinositol (GPI) anchors [1, 2]. It specifically catalyzes the acylation of the inositol ring of glucosaminyl-phosphatidylinositol (GlcN-PI), a necessary step for the subsequent addition of mannose residues in the GPI precursor assembly [3, 4]. In P. falciparum, GPI anchors are the primary means of attaching essential surface proteins, such as Merozoite Surface Protein 1 (MSP1), to the parasite's plasma membrane [2, 4]. These proteins are indispensable for the parasite's ability to invade host erythrocytes and evade the immune system [4]. Inhibition of PfGWT1 disrupts the trafficking of these proteins, leading to a loss of parasite viability and making it a high-priority target for antimalarial drug development [1, 3]. While human cells utilize a homologous enzyme called PIGW, the structural divergence between the two allows for the design of selective inhibitors that minimize host toxicity [3]. Small molecules like Manogepix (APX001) have validated GWT1 as a druggable target in fungi, and similar scaffolds are being explored for their potential as novel antimalarial agents [3, 5]. The essentiality of this pathway across different stages of the parasite life cycle further enhances its appeal as a target for both treatment and transmission blocking [1, 5].

Other names

PfGWT1Inositol acyltransferaseGPI-anchored wall transfer protein 1PF3D7_0515800

Inhibition of the acylation of the inositol ring of glucosaminyl-phosphatidylinositol (GlcN-PI) during the biosynthesis of glycosylphosphatidylinositol (GPI) anchors.