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Ammonium transporters achieve charge transfer by fragmenting their substrate

Author(s): Wang S; Orabi EA; Baday S; Bernèche S; Lamoureux G;

Proteins of the Amt/MEP family facilitate ammonium transport across the membranes of plants, fungi, and bacteria and are essential for growth in nitrogen-poor environments. Some are known to facilitate the diffusion of the neutral NH(3), while others, notab ...

Article GUID: 22631217


Identification of a cholesterol-binding pocket in inward rectifier K(+) (Kir) channels

Author(s): Fürst O; Nichols CG; Lamoureux G; D' Avanzo N;

Cholesterol is the major sterol component of all mammalian plasma membranes. Recent studies have shown that cholesterol inhibits both bacterial (KirBac1.1 and KirBac3.1) and eukaryotic (Kir2.1) inward rectifier K(+) (Kir) channels. Lipid-sterol interactions ...

Article GUID: 25517146


Salt-Dependent Interactions between the C-Terminal Domain of Osmoregulatory Transporter ProP of Escherichia coli and the Lipid Membrane

Author(s): Ozturk TN; Culham DE; Tempelhagen L; Wood JM; Lamoureux G;

Osmosensing transporter ProP detects the increase in cytoplasmic cation concentration associated with osmotically induced cell dehydration and mediates osmolyte uptake into bacteria. ProP is a 12-transmembrane helix protein with an a-helical, cytoplasmic C- ...

Article GUID: 32838524


Genetic, Structural, and Functional Evidence Link TMEM175 to Synucleinopathies

Author(s): Krohn L; Öztürk TN; Vanderperre B; Ouled Amar Bencheikh B; Ruskey JA; Laurent SB; Spiegelman D; Postuma RB; Arnulf I; Hu MTM; Dauvilliers Y; ...

Objective: The TMEM175/GAK/DGKQ locus is the 3rd strongest risk locus in genome-wide association studies of Parkinson disease (PD). We aimed to identify the specific disease-associated variants in ...

Article GUID: 31658403


Drude polarizable force field for cation-π interactions of alkali and quaternary ammonium ions with aromatic amino acid side chains

Author(s): Orabi EA; Davis RL; Lamoureux G;

Cation-p interactions play important roles in molecular recognition and in the stability and function of proteins. However, accurate description of the structure and energetics of cation-p interactions presents a challenge to both additive and polarizable f ...

Article GUID: 31652004


Dual Role of the C-Terminal Domain in Osmosensing by Bacterial Osmolyte Transporter ProP

Author(s): Culham DE; Marom D; Boutin R; Garner J; Ozturk TN; Sahtout N; Tempelhagen L; Lamoureux G; Wood JM; ...

ProP is a member of the major facilitator superfamily, a proton-osmolyte symporter, and an osmosensing transporter. ProP proteins share extended cytoplasmic carboxyl terminal domains (CTDs) implica ...

Article GUID: 30448037


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