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- W2099352092 endingPage "1052" @default.
- W2099352092 startingPage "1041" @default.
- W2099352092 abstract "Dengue virus is coated by an icosahedral shell of 90 envelope protein dimers that convert to trimers at low pH and promote fusion of its membrane with the membrane of the host endosome. We provide the first estimates for the free energy barrier and minimum for two key steps in this process: host membrane bending and protein–membrane binding. Both are studied using complementary membrane elastic, continuum electrostatics and all-atom molecular dynamics simulations. The predicted host membrane bending required to form an initial fusion stalk presents a 22–30 kcal/mol free energy barrier according to a constrained membrane elastic model. Combined continuum and molecular dynamics results predict a 15 kcal/mol free energy decrease on binding of each trimer of dengue envelope protein to a membrane with 30% anionic phosphatidylglycerol lipid. The bending cost depends on the preferred curvature of the lipids composing the host membrane leaflets, while the free energy gained for protein binding depends on the surface charge density of the host membrane. The fusion loop of the envelope protein inserts exactly at the level of the interface between the membrane's hydrophobic and head-group regions. The methods used in this work provide a means for further characterization of the structures and free energies of protein-assisted membrane fusion." @default.
- W2099352092 created "2016-06-24" @default.
- W2099352092 creator A5027147730 @default.
- W2099352092 creator A5030102792 @default.
- W2099352092 creator A5054856469 @default.
- W2099352092 date "2015-04-01" @default.
- W2099352092 modified "2023-09-25" @default.
- W2099352092 title "Molecular basis of endosomal-membrane association for the dengue virus envelope protein" @default.
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