Proton-Coupled Transition between Outward-Facing and Inward-Facing States in the Uracil Transporter
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چکیده
منابع مشابه
Outward- and inward-facing structures of a putative bacterial transition-metal transporter with homology to ferroportin
In vertebrates, the iron exporter ferroportin releases Fe(2+) from cells into plasma, thereby maintaining iron homeostasis. The transport activity of ferroportin is suppressed by the peptide hormone hepcidin, which exhibits upregulated expression in chronic inflammation, causing iron-restrictive anaemia. However, due to the lack of structural information about ferroportin, the mechanisms of its...
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The study of membrane proteins remains a challenging task, and approaches to unravel their dynamics are scarce. Here, we applied hydrogen/deuterium exchange (HDX) coupled to mass spectrometry to probe the motions of a bacterial multidrug ATP-binding cassette (ABC) transporter, BmrA, in the inward-facing (resting state) and outward-facing (ATP-bound) conformations. Trypsin digestion and global o...
متن کاملCocaine acts as an apparent competitive inhibitor at the outward-facing conformation of the human norepinephrine transporter: kinetic analysis of inward and outward transport.
The inhibition by cocaine of inward and outward transport of dopamine (DA) at the cloned human norepinephrine transporter (hNET) and the relationship of the inhibitory patterns of cocaine to the conformational requirements of the transporter were investigated. This was done using rotating disk electrode voltammetry in transfected cells. The uphill uptake of external DA, the lack of inhibition b...
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BACKGROUND The dopamine transporter (DAT), a member of the neurotransmitter:Na(+) symporter (NSS) family, terminates dopaminergic neurotransmission and is a major molecular target for psychostimulants such as cocaine and amphetamine, and for the treatment of attention deficit disorder and depression. The crystal structures of the prokaryotic NSS homolog of DAT, the leucine transporter LeuT, hav...
متن کاملUnbiased Simulations Reveal the Inward-Facing Conformation of the Human Serotonin Transporter and Na+ Ion Release
Monoamine transporters are responsible for termination of synaptic signaling and are involved in depression, control of appetite, and anxiety amongst other neurological processes. Despite extensive efforts, the structures of the monoamine transporters and the transport mechanism of ions and substrates are still largely unknown. Structural knowledge of the human serotonin transporter (hSERT) is ...
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ژورنال
عنوان ژورنال: Biophysical Journal
سال: 2013
ISSN: 0006-3495
DOI: 10.1016/j.bpj.2012.11.1604