Novel K540N Mutation in Plasmodium falciparum Dihydropteroate Synthetase Confers a Lower Level of Sulfa Drug Resistance than Does a K540E Mutation
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چکیده
منابع مشابه
Novel K540N mutation in Plasmodium falciparum dihydropteroate synthetase confers a lower level of sulfa drug resistance than does a K540E mutation.
Sulfadoxine (SDX) and sulfamethoxazole (SMX) each inhibit the Plasmodium falciparum dihydropteroate synthetase (PfDHPS), and certain point mutations in this enzyme yield the drug-resistant parasite. Using a simple Escherichia coli model system, we describe here the effect of the recently reported novel K540N mutation in PfDHPS on the level of SDX/SMX resistance. The survival rate of the transfo...
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Dihydropteroate synthase (DHPS) is a known sulfa drug target in malaria treatment, existing as a bifunctional enzyme together with hydroxymethyldihydropterin pyrophosphokinase (HPPK). Polymorphisms in key residues of Plasmodium falciparum DHPS (PfDHPS) have been characterized and linked to sulfa drug resistance in malaria. Genetic sequencing of P. vivax dhps (Pvdhps) from clinical isolates has ...
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With the spread of chloroquine (CQ)-resistant malaria in India, sulfadoxine-pyrimethamine (SP) alone or in combination with artesunate is used as an alternative antimalarial drug. Due to continuous drug pressure, the Plasmodium falciparum parasite is exhibiting resistance to antifolates because of mutations in candidate genes dihydrofolate reductase (dhfr) and dihydropteroate synthetase (dhps)....
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ژورنال
عنوان ژورنال: Antimicrobial Agents and Chemotherapy
سال: 2011
ISSN: 0066-4804,1098-6596
DOI: 10.1128/aac.01394-10