2A65
Crystal structure of LEUTAA, a bacterial homolog of Na+/Cl--dependent neurotransmitter transporters
Summary for 2A65
| Entry DOI | 10.2210/pdb2a65/pdb |
| Descriptor | Na(+):neurotransmitter symporter (Snf family), octyl beta-D-glucopyranoside, SODIUM ION, ... (6 entities in total) |
| Functional Keywords | membrane protein, transport protein |
| Biological source | Aquifex aeolicus |
| Total number of polymer chains | 1 |
| Total formula weight | 59751.89 |
| Authors | Yamashita, A.,Singh, S.K.,Kawate, T.,Jin, Y.,Gouaux, E. (deposition date: 2005-07-01, release date: 2005-08-02, Last modification date: 2024-02-14) |
| Primary citation | Yamashita, A.,Singh, S.K.,Kawate, T.,Jin, Y.,Gouaux, E. Crystal structure of a bacterial homologue of Na(+)/Cl(-)-dependent neurotransmitter transporters. Nature, 437:215-223, 2005 Cited by PubMed Abstract: Na+/Cl--dependent transporters terminate synaptic transmission by using electrochemical gradients to drive the uptake of neurotransmitters, including the biogenic amines, from the synapse to the cytoplasm of neurons and glia. These transporters are the targets of therapeutic and illicit compounds, and their dysfunction has been implicated in multiple diseases of the nervous system. Here we present the crystal structure of a bacterial homologue of these transporters from Aquifex aeolicus, in complex with its substrate, leucine, and two sodium ions. The protein core consists of the first ten of twelve transmembrane segments, with segments 1-5 related to 6-10 by a pseudo-two-fold axis in the membrane plane. Leucine and the sodium ions are bound within the protein core, halfway across the membrane bilayer, in an occluded site devoid of water. The leucine and ion binding sites are defined by partially unwound transmembrane helices, with main-chain atoms and helix dipoles having key roles in substrate and ion binding. The structure reveals the architecture of this important class of transporter, illuminates the determinants of substrate binding and ion selectivity, and defines the external and internal gates. PubMed: 16041361DOI: 10.1038/nature03978 PDB entries with the same primary citation |
| Experimental method | X-RAY DIFFRACTION (1.65 Å) |
Structure validation
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