Ambili Ramanthrikkovil Variyam

Regulating Ligand‐to‐Metal Charge Transfer in UiO‐66(Zr)‐NH 2 With Site‐Isolated Cu + Centers for Efficient Photocatalytic H 2 O 2 Generation

Aneek Kuila, Khaled Dassouki, Aditya Swarup Lal, Ambili Ramanthrikkovil Variyam et autres

Site‐isolated metal centers within metal‐organic frameworks (MOFs) offer a promising strategy to regulate charge–transfer dynamics and enhance photocatalysis. Here, we investigate the influence of atomically dispersed Cu ions on the photophysics and photocatalytic activity of the zirconium‐based MOF UiO‐66(Zr)‐NH 2 . Cu …

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ATP synthase activity boosts membrane proton acceptance and lateral diffusion

Hendrik Flegel, Ambili Ramanthrikkovil Variyam, Nadav Amdursky, Claudia Steinem

In most organisms, ATP synthesis is powered by the proton motive force (pmf) and catalyzed by ATP synthase. While the chemiosmotic theory originally proposed a “delocalized coupling” between proton pumps and consumers, growing evidence implicates the membrane in mediating localized proton transfer …

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Photophysics of cu-loaded MIL-125(Ti)-NH₂: Unravelling the role of cu oxidation states through time-resolved spectroscopy and density functional theory

Aneek Kuila, Khaled Dassouki, Valentin Diez Cabanes, Dorit Grinberg et autres

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The role of ester- versus ether-linked phospholipids in the ability of biological membranes to accept protons and support proton diffusion

Ambili Ramanthrikkovil Variyam, Mario Mencı́a, Nadav Amdursky

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The role of lipid phase and temperature in proton barrier and proton migration on biological membranes

Ambili Ramanthrikkovil Variyam, Mateusz Rzycki, Ramesh Nandi, Alexei A. Stuchebrukhov et autres

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 …

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Photophysics of Cu-Loaded Mil-125(Ti)-Nh₂: Unravelling the Role of Cu Oxidation States Through Time-Resolved Spectroscopy and Density Functional Theory

Aneek Kuila, Khaled Dassouki, Valentin Diez Cabanes, Dorit Grinberg et autres

es, fr (code pays fourni par la source)

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

Ambili Ramanthrikkovil Variyam, Mateusz Rzycki, Ramesh Nandi, Alexei A. Stuchebrukhov et autres

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 …

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Proton diffusion on the surface of mixed lipid membranes highlights the role of membrane composition

Ambili Ramanthrikkovil Variyam, Mateusz Rzycki, Anna Yucknovsky, Alexei A. Stuchebrukhov et autres

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Fluorophore Concentration Controls the Homo-FRET Efficiency and Directionality across Proteins both in Solution and in Solid Protein Matrices

Yuval Agam, Ambili Ramanthrikkovil Variyam, Nadav Amdursky

Light harvesting in nature is one of the most important processes, starting with the absorption of light by chromophores within proteins and the transfer of energy from one another via the Förster resonance energy transfer (FRET) mechanism. If the energy is transferred …

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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

Ambili Ramanthrikkovil Variyam, Mateusz Rzycki, Anna Yucknovsky, Alexei A. Stuchebrukhov et autres

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 …

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Solid-State Molecular Protonics Devices of Solid-Supported Biological Membranes Reveal the Mechanism of Long-Range Lateral Proton Transport

Ambili Ramanthrikkovil Variyam, Mikhail A. Stolov, Jiajun Feng, Nadav Amdursky

Lateral proton transport (PT) on the surface of biological membranes is a fundamental biochemical process in the bioenergetics of living cells, but a lack of available experimental techniques has resulted in a limited understanding of its mechanism. Here, we present a molecular …

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Solid-state lateral proton conduction via solid-supported biological membranes reveals the role of membrane structure and bound water in proton transport

Ambili Ramanthrikkovil Variyam, Mikhail A. Stolov, Jiajun Feng, Nadav Amdursky

Lateral proton transport (PT) on the surface of biological membranes is a fundamental biochemical process in the bioenergetics of living cells, but a lack of available experimental techniques has resulted in a limited understanding of its mechanism. Here, we introduce a new …

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