Neurotransmitter and psychostimulant recognition by the dopamine transporter

Kevin H. Wang, Aravind Penmatsa and Eric Gouaux ()
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Kevin H. Wang: Vollum Institute, Oregon Health & Science University
Aravind Penmatsa: Vollum Institute, Oregon Health & Science University
Eric Gouaux: Vollum Institute, Oregon Health & Science University

Nature, 2015, vol. 521, issue 7552, 322-327

Abstract: Abstract 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, a substrate analogue 3,4-dichlorophenethylamine, the psychostimulants d-amphetamine and 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.

Date: 2015
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DOI: 10.1038/nature14431

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