Lipid protrusions, membrane softness, and enzymatic activity

Literature Information

Publication Date 2004-03-05
DOI 10.1039/B314146B
Impact Factor 3.676
Authors

Pernille Høyrup, Thomas H. Callisen, Morten Ø. Jensen, Avi Halperin, Ole G. Mouritsen


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Abstract

The activity of phospholipase A2 on lipid bilayers displays a characteristic lag–burst behavior that has previously been shown to reflect the physical properties of the substrate. It has remained unclear which underlying molecular mechanism is responsible for this phenomenon. We propose here that protrusions of single lipid molecules out of the bilayer plane could provide such a mechanism. The proposal is supported by a combination of atomic-scale molecular dynamics simulations, theory, and experiments that have been performed in order to investigate the relationship between on the one side lipid protrusion modes and mechanical softness of phospholipid bilayers and on the other side the activity of enzymes acting on lipid bilayers composed of different unsaturated lipids. Specifically, our experiments show a correlation between the bilayer bending rigidity and the apparent Arrhenius activation energy extracted from systematic lag-time versus temperature analyses.

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Contents list

Front/Back Matter

DOI: 10.1039/C6CP90135B

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Source Journal

Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics
CiteScore: 5.5
Self-citation Rate: 10.3%
Articles per Year: 3036

Physical Chemistry Chemical Physics (PCCP) is an international journal co-owned by 19 physical chemistry and physics societies from around the world. This journal publishes original, cutting-edge research in physical chemistry, chemical physics and biophysical chemistry. To be suitable for publication in PCCP, articles must include significant innovation and/or insight into physical chemistry; this is the most important criterion that reviewers and Editors will judge against when evaluating submissions. The journal has a broad scope and welcomes contributions spanning experiment, theory, computation and data science. Topical coverage includes spectroscopy, dynamics, kinetics, statistical mechanics, thermodynamics, electrochemistry, catalysis, surface science, quantum mechanics, quantum computing and machine learning. Interdisciplinary research areas such as polymers and soft matter, materials, nanoscience, energy, surfaces/interfaces, and biophysical chemistry are welcomed if they demonstrate significant innovation and/or insight into physical chemistry. Joined experimental/theoretical studies are particularly appreciated when complementary and based on up-to-date approaches.

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