Abstract
Fractionation of Plasmodium falciparum cellular extracts by fast protein liquid chromatography (FPLC) identified at least two different DNA polymerases. An aphidicolin-sensitive activity co-purified with a primase activity. This, in combination with other characteristics (processivity, sensitivity to other inhibitors), most likely classifies this enzyme as an α-like DNA polymerase. It was, however, relatively resistant to N 2-( p- n-butylphenyl)deoxyguanosine 5′-triphosphate (IC 50 = 6.6 μM) and differs in this aspect from the host homologue, possibly indicating structural differences between host and parasite DNA polymerase α. The other DNA polymerase matched eukaryotic DNA polymerase γ in all properties tested.
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