Neurotransmitter and psychostimulant recognition by the dopamine transporter.

Neurotransmitter and psychostimulant recognition by the dopamine transporter.
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DOI:
10.1038/nature14431
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发表时间:
2015-05-21
期刊:
影响因子:
64.8
通讯作者:
Gouaux, Eric
Gouaux, Eric
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Wang, Kevin H.;Penmatsa, Aravind;Gouaux, Eric

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Na+/Cl−偶联生物胺转运蛋白是治疗药物和滥用药物的主要靶点,从抗抑郁药到精神兴奋剂可卡因和安非他明,以及它们的同源底物。在这里,我们确定的果蝇多巴胺转运蛋白(dDAT)结合其底物多巴胺(DA),底物类似物3,4-二氯苯乙胺,精神兴奋剂D-苯丙胺,甲基苯丙胺,或可卡因和可卡因类似物的X-射线晶体结构。所有配体都结合到位于膜双层大约一半的中央结合位点,与结合的钠离子和氯离子非常接近。中心结合位点通过构象变化识别三种化学上不同的配体,这些构象变化适应不同的大小和形状,从而说明了区分生物胺转运蛋白中底物和抑制剂的分子原理。
Na+/Cl−-coupled biogenic amine transporters are the primary targets of therapeutic and abused drugs, ranging from antidepressants to the psychostimulants cocaine and amphetamines, and to their cognate substrates. Here we determine x-ray crystal structures of the Drosophila melanogaster dopamine transporter (dDAT) bound to its substrate dopamine (DA), a substrate analogue 3,4-dichlorophenethylamine, the psychostimulants D-amphetamine, methamphetamine, or to cocaine and cocaine analogues. All ligands bind to the central binding site, located approximately halfway across the membrane bilayer, in close proximity to bound sodium and chloride ions. The central binding site recognizes three chemically distinct classes of ligands via conformational changes that accommodate varying sizes and shapes, thus illustrating molecular principles that distinguish substrates from inhibitors in biogenic amine transporters.
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