Structure and Dynamics of Star Polymer Films from Coarse-Grained Molecular Simulations

2021 ◽  
Author(s):  
Wengang Zhang ◽  
Jack F. Douglas ◽  
Alexandros Chremos ◽  
Francis W. Starr
Keyword(s):  
Polymer Films ◽  
Molecular Simulations ◽  
Coarse Grained ◽  
Star Polymer ◽  
Structure And Dynamics

Simulation studies of the interactions between membrane proteins and detergents

2005 ◽  
Vol 33 (5) ◽  
pp. 910-912 ◽  
Author(s):  
P.J. Bond ◽  
J. Cuthbertson ◽  
M.S.P. Sansom
Keyword(s):  
Membrane Proteins ◽  
Membrane Protein ◽  
Self Assembly ◽  
Kinetic Mechanism ◽  
Coarse Grained ◽  
Simulation Studies ◽  
High Resolution Data ◽  
Biologically Relevant ◽  
Structure And Dynamics ◽  
Detergent Interactions

Interactions between membrane proteins and detergents are important in biophysical and structural studies and are also biologically relevant in the context of folding and transport. Despite a paucity of high-resolution data on protein–detergent interactions, novel methods and increased computational power enable simulations to provide a means of understanding such interactions in detail. Simulations have been used to compare the effect of lipid or detergent on the structure and dynamics of membrane proteins. Moreover, some of the longest and most complex simulations to date have been used to observe the spontaneous formation of membrane protein–detergent micelles. Common mechanistic steps in the micelle self-assembly process were identified for both α-helical and β-barrel membrane proteins, and a simple kinetic mechanism was proposed. Recently, simplified (i.e. coarse-grained) models have been utilized to follow long timescale transitions in membrane protein–detergent assemblies.

scholarly journals Introducing Memory in Coarse-Grained Molecular Simulations

2021 ◽  
Author(s):  
Viktor Klippenstein ◽  
Madhusmita Tripathy ◽  
Gerhard Jung ◽  
Friederike Schmid ◽  
Nico F. A. van der Vegt
Keyword(s):  
Molecular Simulations ◽  
Coarse Grained

scholarly journals How proteins open fusion pores: insights from molecular simulations

2020 ◽  
Author(s):  
H. Jelger Risselada ◽  
Helmut Grubmüller
Keyword(s):  
Free Energy ◽  
Fusion Proteins ◽  
Graphics Processing Units ◽  
Fusion Reaction ◽  
Molecular Simulations ◽  
Minimum Free Energy ◽  
Free Energy Calculations ◽  
Coarse Grained ◽  
Fusion Pore ◽  
Graphics Processing

AbstractFusion proteins can play a versatile and involved role during all stages of the fusion reaction. Their roles go far beyond forcing the opposing membranes into close proximity to drive stalk formation and fusion. Molecular simulations have played a central role in providing a molecular understanding of how fusion proteins actively overcome the free energy barriers of the fusion reaction up to the expansion of the fusion pore. Unexpectedly, molecular simulations have revealed a preference of the biological fusion reaction to proceed through asymmetric pathways resulting in the formation of, e.g., a stalk-hole complex, rim-pore, or vertex pore. Force-field based molecular simulations are now able to directly resolve the minimum free-energy path in protein-mediated fusion as well as quantifying the free energies of formed reaction intermediates. Ongoing developments in Graphics Processing Units (GPUs), free energy calculations, and coarse-grained force-fields will soon gain additional insights into the diverse roles of fusion proteins.

Effect of oligonucleic acid (ONA) backbone features on assembly of ONA–star polymer conjugates: a coarse-grained molecular simulation study

Soft Matter ◽  
2017 ◽  
Vol 13 (38) ◽  
pp. 6770-6783 ◽  
Author(s):  
Joshua E. Condon ◽  
Arthi Jayaraman
Keyword(s):  
Molecular Simulation ◽  
Simulation Study ◽  
Coarse Grained ◽  
Star Polymer ◽  
Backbone Flexibility ◽  
Polymer Architecture ◽  
Polymer Conjugates ◽  
Coarse Grained Simulations

Using coarse-grained simulations, we study the effect of varying oligonucleic acid (ONA) backbone flexibility, ONA charge and star polymer architecture on structure and thermodynamics of ONA–star polymer conjugates assembly.

Correlation between morphology and anisotropic transport properties of diblock copolymers melts

Soft Matter ◽  
2019 ◽  
Vol 15 (5) ◽  
pp. 851-859 ◽  
Author(s):  
Mohammed Suliman Alshammasi ◽  
Fernando A. Escobedo
Keyword(s):  
Transport Properties ◽  
Diblock Copolymers ◽  
Molecular Simulations ◽  
Coarse Grained ◽  
Anisotropic Transport

Molecular simulations of coarse-grained diblock copolymers (DBP) were conducted to study the effect of segregation strength and morphology on transport properties.

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