Structure of the G119S Mutant Acetylcholinesterase of the Malaria Vector Anopheles gambiae Reveals Basis of Insecticide Resistance.
Structure of the G119S Mutant Acetylcholinesterase of the Malaria Vector Anopheles gambiae Reveals Basis of Insecticide Resistance.
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DOI:
10.1016/j.str.2017.11.021
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发表时间:
2018-01-02
期刊:
影响因子:
--
通讯作者:
Carlier PR
中科院分区:
文献类型:
--
作者:
Cheung J;Mahmood A;Kalathur R;Liu L;Carlier PR
Malaria is a devastating disease in sub-Saharan Africa and is transmitted by the mosquito Anopheles gambiae. While indoor residual spraying of anticholinesterase insecticides has been useful in controlling the spread of malaria, widespread application of these compounds has led to the rise of an insecticide-resistant mosquito strain that harbors a G119S mutation in the nervous system target enzyme acetylcholinesterase. We demonstrate the atomic basis of insecticide resistance through structure determination of the G119S mutant acetylcholinesterase of An. gambiae in the ligand-free state and bound to a potent difluoromethyl ketone inhibitor. These structures reveal specific features within the active site gorge distinct from human acetylcholinesterase, including an open channel at the base of the gorge, and provide a means for improving species-selectivity in the rational design of improved insecticides for malaria vector control. Cheung et al. present crystal structures of the G119S mutant acetylcholinesterase of the malaria mosquito, a mutation conferring insecticide resistance, thus hampering vector control efforts. These structures reveal unique features including an open channel that may be exploited in the design of improved resistance-breaking insecticides.
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DOI:
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发表时间:
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期刊:
Acta crystallographica. Section D, Biological crystallography
影响因子:
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