Abstract：
:There is a scarcity of pharmacological tools to interrogate protein kinase function in Plasmodium parasites, the causative agent of malaria. Among Plasmodium's protein kinases, those characterized as atypical represent attractive drug targets as they lack sequence similarity to human proteins. Here, we describe takinib as a small molecule to bind the atypical P. falciparum protein kinase 9 (PfPK9). PfPK9 phosphorylates the Plasmodium E2 ubiquitin-conjugating enzyme PfUBC13, which mediates K63-linkage-specific polyubiquitination. Takinib is a potent human TAK1 inhibitor, thus we developed the Plasmodium-selective takinib analog HS220. We demonstrate that takinib and HS220 decrease K63-linked ubiquitination in P. falciparum, suggesting PfPK9 inhibition in cells. Takinib and HS220 induce a unique phenotype where parasite size in hepatocytes increases, yet high compound concentrations decrease the number of parasites. Our studies highlight the role of PK9 in regulating parasite development and the potential of targeting Plasmodium kinases for malaria control.
journal_name
Cell Chem Bioljournal_title
Cell chemical biologyauthors
Raphemot R,Eubanks AL,Toro-Moreno M,Geiger RA,Hughes PF,Lu KY,Haystead TAJ,Derbyshire ERdoi
10.1016/j.chembiol.2018.11.003subject
Has Abstractpub_date
2019-03-21 00:00:00pages
411-419.e7issue
3eissn
2451-9456issn
2451-9448pii
S2451-9456(18)30391-Xjournal_volume
26pub_type
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journal_title：Cell chemical biology
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journal_title：Cell chemical biology
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