Gene and Protein Information
Species	TM	AA	Chromosomal Location	Gene Symbol	Gene Name	Reference
Plasmodium falciparum 3D7	-	706		PPPK-DHPS	hydroxymethyldihydropterin pyrophosphokinase-dihydropteroate synthase

Database Links
PlasmoDB	PF3D7_0810800 (Pf3D7)
UniProtKB	Q8IAU3 (Pf3D7)

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Inhibitors
Key to terms and symbols	View all chemical structures	Click column headers to sort
Ligand Sp. Action Value Parameter Reference dapsone Pf Plasmodium falciparum P. falciparum (Pf) is one of five protozoan parasite species of the genus Plasmodium that cause malaria in humans. Pf is responsible for the majority of malaria related deaths and is the most prevalent species in sub-Saharan Africa. ✖ Inhibition 5.2 pKi 3 ⤷ pKi 5.2 (Ki 6x10-6 M) [3] Description: Enzyme inhibition assay.

Whole Organism Assay Data Linked to This Target
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Ligand Sp. Assay description Type Action Value Parameter Reference sulfadoxine PfHB3 Plasmodium falciparum HB3 P. falciparum strain HB3 (PfHB3) was cloned from the Honduras I/CDC strain, originally isolated from a patient in Choluteca, Honduras, during an outbreak of urban malaria in January 1980. PfHB3 can be obtained from the European Malaria Reagent Repository or the Malaria Research and Reference Reagent Resource Center (MR4) and is reported to be chloroquine sensitive. ✖ Parasite growth inhibition assay - - 8.4 pIC50 2 ⤷ pIC50 8.4 (IC50 4x10-9 M) [3H]-hypoxanthine incorporation [2] Lifecycle stages: Plasmodium asexual blood stage (erythrocytic merozoite, trophozoite, erythrocytic schizont) sulfadoxine Pf3D7 Plasmodium falciparum 3D7 P. falciparum strain 3D7 (Pf3D7) was derived from isolate NF54 by limiting dilution. The complete genome of Pf3D7 has been sequenced (GenBank: LN999946.1). Pf3D7 can be obtained from the European Malaria Reagent Repository or the Malaria Research and Reference Reagent Resource Center (MR4) and is sensitive to a panel of antimalarial compounds including chloroquine and pyrimethamine. ✖ Parasite growth inhibition assay - - 7.1 pIC50 2 ⤷ pIC50 7.1 (IC50 7.3x10-8 M) [3H]-hypoxanthine incorporation [2] Lifecycle stages: Plasmodium asexual blood stage (erythrocytic merozoite, trophozoite, erythrocytic schizont) sulfadoxine PfK1 Plasmodium falciparum K1 P. falciparum strain K1 (PfK1) was isolated in Kanchanaburi, Thailand in 1979. PfK1 can be obtained from the European Malaria Reagent Repository or the Malaria Research and Reference Reagent Resource Center (MR4) and is reported to be a multidrug-resistant strain. ✖ Parasite growth inhibition assay - - 6.7 pIC50 2 ⤷ pIC50 6.7 (IC50 2.23x10-7 M) [3H]-hypoxanthine incorporation [2] Lifecycle stages: Plasmodium asexual blood stage (erythrocytic merozoite, trophozoite, erythrocytic schizont) sulfadoxine PfDd2 Plasmodium falciparum Dd2 P. falciparum strain Dd2 (PfDd2) is a clone derived from PfW2, following continuous culture in mefloquine. PfW2 was cloned from the Indochina III/CDC isolate, originally derived from a Laotian patient who failed chloroquine therapy. PfDd2 can be obtained from the Malaria Research and Reference Reagent Resource Center (MR4) and is reported to be resistant to chloroquine, pyrimethamine and mefloquine. ✖ Parasite growth inhibition assay - - 5.4 pIC50 2 ⤷ pIC50 5.4 (IC50 3.97x10-6 M) [3H]-hypoxanthine incorporation [2] Lifecycle stages: Plasmodium asexual blood stage (erythrocytic merozoite, trophozoite, erythrocytic schizont)

Malaria Pharmacology Comments

The Plasmodium enzyme hydroxymethyldihydropterin pyrophosphokinase-dihydropteroate synthase (PfPPPK-DHPS) is a bifunctional protein involved in the folate biosynthesis pathway and in the mechanism of action of the sulfonamide group of drugs [1].