Results 1 to 10 of about 2,833 (216)
Ion selectivity of graphene nanopores [PDF]
Nature Communications, 2016 Sub-nanometer graphene nanopores are usually required to create graphene-based reverse osmosis membranes. Here, Rollings et al.show that membranes with larger pores are highly ion selective and a hundred times more permeable to potassium ions than to ...
Ryan C. Rollings +2 more
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Non-equilibrium dynamics contribute to ion selectivity in the KcsA channel. [PDF]
PLoS ONE, 2014 The ability of biological ion channels to conduct selected ions across cell membranes is critical for the survival of both animal and bacterial cells.
Van Ngo +3 more
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An entropic mechanism of generating selective ion binding in macromolecules. [PDF]
PLoS Computational Biology, 2013 Several mechanisms have been proposed to explain how ion channels and transporters distinguish between similar ions, a process crucial for maintaining proper cell function.
Michael Thomas +2 more
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Structural plasticity of the selectivity filter in a nonselective ion channel
IUCrJ, 2021 The sodium potassium ion channel (NaK) is a nonselective ion channel that conducts both sodium and potassium across the cellular membrane. A new crystallographic structure of NaK reveals conformational differences in the residues that make up the ...
Raktim N. Roy +8 more
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Ion channels and ion selectivity [PDF]
Essays in Biochemistry, 2017 Specific macromolecular transport systems, ion channels and pumps, provide the pathways to facilitate and control the passage of ions across the lipid membrane. Ion channels provide energetically favourable passage for ions to diffuse rapidly and passively according to their electrochemical potential.
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Ion Selectivity in the Selectivity Filters of Acid-Sensing Ion Channels [PDF]
Scientific Reports, 2015 Sodium-selective acid sensing ion channels (ASICs), which belong to the epithelial sodium channel (ENaC) superfamily, are key players in many physiological processes (e.g. nociception, mechanosensation, cognition, and memory) and are potential therapeutic targets.
Todor Dudev, Carmay Lim
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The insights into calcium ion selectivity provided by ancestral prokaryotic ion channels
Biophysics and Physicobiology, 2021 Prokaryotic channels play an important role in the structural biology of ion channels. At the end of the 20th century, the first structure of a prokaryotic ion channel was revealed.
Katsumasa Irie
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Perspectives on: Ion selectivity: Ion selectivity in channels and transporters. [PDF]
J Gen Physiol, 2011 A multitude of biological processes requires the participation of specific cations, such as H+, Na+, K+, Ca2+, and Mg2+. Many of these processes can take place only when proteins have the ability to discriminate between different ions with a very high fidelity.
Roux Benoît +6 more
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Structural and thermodynamic properties of selective ion binding in a K+ channel.
PLoS Biology, 2007 Thermodynamic measurements of ion binding to the Streptomyces lividans K(+) channel were carried out using isothermal titration calorimetry, whereas atomic structures of ion-bound and ion-free conformations of the channel were characterized by x-ray ...
Steve W Lockless +2 more
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Advanced Membranes, 2022 Mono-/multivalent ion-selective separation has become a common requirement at the water-energy nexus, including energy storage and conversion, water purification, and sustainable industrial processes.
Dan Lu +5 more
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