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- W2912122843 abstract "Membrane fusion is vital for cellular function and is generally mediated via fusogenic proteins and peptides. The mechanistic details and subsequently the transition state dynamics of membrane fusion will be dependent on the type of the fusogenic agent. We have previously established the potential of general anesthetics as a new class of fusion triggering agents in model membranes. We employed two-photon excitation fluorescence cross-correlation spectroscopy (TPE-FCCS) to report on vesicle association kinetics and steady-state fluorescence dequenching assays to monitor lipid mixing kinetics. Using halothane to trigger fusion in 110 nm diameter dioleoylphosphatidylcholine (DOPC) liposomes, we found that lipid rearrangement towards the formation of the fusion stalk was rate limiting. The activation barrier for halothane induced membrane fusion in 110 nm vesicles was found to be ∼40 kJ mol −1 . We calculated the enthalpy and entropy of the transition state to be ∼40 kJ mol −1 and ∼180 J mol −1 K −1 , respectively. We have found that the addition of halothane effectively lowers the energy barrier for membrane fusion in less curved vesicles largely due to entropic advantages." @default.
- W2912122843 created "2019-02-21" @default.
- W2912122843 creator A5021501097 @default.
- W2912122843 creator A5061902195 @default.
- W2912122843 date "2019-06-01" @default.
- W2912122843 modified "2023-09-27" @default.
- W2912122843 title "Elucidation of the mechanism and energy barrier for anesthetic triggered membrane fusion in model membranes" @default.
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- W2912122843 doi "https://doi.org/10.1139/cjc-2018-0405" @default.
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