7wgd | pdb_00007wgd

X-ray structure of thermostabilized Drosophila dopamine transporter with GABA transporter1-like substitutions in the binding site, in substrate-free form.

spinqualitylabelsall models 7wgd, resolution 3.20Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 7wgd is a 3 chain structure. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: CL, CLR, NA, Y01 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function [DAT_DROME] Sodium-dependent dopamine transporter which terminates the action of dopamine by its high affinity sodium-dependent reuptake into presynaptic terminals (PubMed:11125028, PubMed:12606774, PubMed:24037379, PubMed:25970245). Also transports tyramine and norepinephrine, shows less efficient transport of octopamine and does not transport serotonin (PubMed:11125028, PubMed:12606774). Plays a role in the regulation of the rest/activity cycle (PubMed:16093388, PubMed:25232310). Publication Abstract from PubMed gamma-aminobutyric acid (GABA) is the major inhibitory neurotransmitter, and its levels in the synaptic space are controlled by the GABA transporter isoforms (GATs). GATs are structurally related to biogenic amine transporters but display interactions with distinct inhibitors used as anti-epileptics. In this study, we engineer the binding pocket of Drosophila melanogaster dopamine transporter to resemble GAT1 and determine high-resolution X-ray structures of the modified transporter in the substrate-free state and in complex with GAT1 inhibitors NO711 and SKF89976a that are analogs of tiagabine, a medication prescribed for the treatment of partial seizures. We observe that the primary binding site undergoes substantial shifts in subsite architecture in the modified transporter to accommodate the two GAT1 inhibitors. We also observe that SKF89976a additionally interacts at an allosteric site in the extracellular vestibule, yielding an occluded conformation. Interchanging SKF89976a interacting residue in the extracellular loop 4 between GAT1 and dDAT suggests a role for this motif in the selective control of neurotransmitter uptake. Our findings, therefore, provide vital insights into the organizational principles dictating GAT1 activity and inhibition. Structural insights into GABA transport inhibition using an engineered neurotransmitter transporter.,Joseph D, Nayak SR, Penmatsa A EMBO J. 2022 Jul 7:e110735. doi: 10.15252/embj.2022110735. PMID:35796008 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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