Ambili Ramanthrikkovil Variyam on Muck Rack

Ambili Ramanthrikkovil Variyam

As seen in: Cell Press
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Articles

Proton migration on biological membranes: Lipid phase, temperature, and composition dependence of proton transfer processes and membrane proton barrier

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By Ambili Ramanthrikkovil Variyam, Mateusz Rzycki, Ramesh Nandi, Alexei A Stuchebrukhov
| biorxiv.org
Abstract Biological membranes play a major role in diffusing protons on their surfaces between transmembrane protein complexes. The retention of protons on the membrane's surface is commonly described by a membrane-associated proton barrier that determines the efficiency of protons escaping from surface to bulk, which correlates with the proton diffusion (PD) dimensionality at the membrane's surface.
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Proton diffusion on the surface of mixed lipid membranes highlights the role of membrane composition

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By Ambili Ramanthrikkovil Variyam, Schulich Faculty, Mateusz Rzycki, Anna Yucknovsky
| Cell Press Verified
Abstract Proton circuits within biological membranes, the foundation of natural bioenergetic systems, are significantly influenced by the lipid compositions of different biological membranes. In this study, we investigate the influence of mixed lipid membrane composition on the proton transfer (PT) properties on the surface of the membrane. We track the excited-state PT (ESPT) process from a tethered probe to the membrane with time-scales and length-scales of PT relevant to bioenergetic systems.
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The interplay between proton diffusion across biological membranes and their biophysical properties highlights the role of defects in mixed lipid membranes

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By Ambili Ramanthrikkovil Variyam, Mateusz Rzycki, Anna Yucknovsky, Alexei A Stuchebrukhov
| biorxiv.org
Abstract Proton circuits within biological membranes are at the heart of natural bioenergetic systems, whereas different biological membranes are characterized by different lipid compositions. In this study, we investigate how the composition of mixed lipid membranes influences the proton transfer (PT) properties of the membrane by following the excited-state PT (ESPT) process from a tethered probe to the membrane with time-scales and length-scales of PT that are relevant to bioenergetic systems.
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