Abstract:
:The mechanism of action of artemisinin and its derivatives, the most potent of the anti-malarial drugs, is not completely understood. Here we present an unbiased chemical proteomics analysis to directly explore this mechanism in Plasmodium falciparum. We use an alkyne-tagged artemisinin analogue coupled with biotin to identify 124 artemisinin covalent binding protein targets, many of which are involved in the essential biological processes of the parasite. Such a broad targeting spectrum disrupts the biochemical landscape of the parasite and causes its death. Furthermore, using alkyne-tagged artemisinin coupled with a fluorescent dye to monitor protein binding, we show that haem, rather than free ferrous iron, is predominantly responsible for artemisinin activation. The haem derives primarily from the parasite's haem biosynthesis pathway at the early ring stage and from haemoglobin digestion at the latter stages. Our results support a unifying model to explain the action and specificity of artemisinin in parasite killing.
journal_name
Nat Communjournal_title
Nature communicationsauthors
Wang J,Zhang CJ,Chia WN,Loh CC,Li Z,Lee YM,He Y,Yuan LX,Lim TK,Liu M,Liew CX,Lee YQ,Zhang J,Lu N,Lim CT,Hua ZC,Liu B,Shen HM,Tan KS,Lin Qdoi
10.1038/ncomms10111subject
Has Abstractpub_date
2015-12-22 00:00:00pages
10111issn
2041-1723pii
ncomms10111journal_volume
6pub_type
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