scholarly journals Mechanically Untying a Protein Slipknot: Multiple Pathways Revealed by Force Spectroscopy and Steered Molecular Dynamics Simulations

2012 ◽  
Vol 134 (25) ◽  
pp. 10428-10435 ◽  
Author(s):  
Chengzhi He ◽  
Georgi Z. Genchev ◽  
Hui Lu ◽  
Hongbin Li
Keyword(s):  
Molecular Dynamics ◽  
Molecular Dynamics Simulations ◽  
Force Spectroscopy ◽  
Steered Molecular Dynamics ◽  
Dynamics Simulations

How strong are hydrogen bonds in the peptide model?

2020 ◽  
Vol 22 (3) ◽  
pp. 1392-1399
Author(s):  
Jakub Dąbrowski ◽  
Wiesław Nowak ◽  
Arkadiusz Ptak
Keyword(s):  
Molecular Dynamics ◽  
Hydrogen Bonds ◽  
Molecular Dynamics Simulations ◽  
Force Spectroscopy ◽  
Steered Molecular Dynamics ◽  
Dynamic Force ◽  
Dynamic Force Spectroscopy ◽  
Dynamics Simulations

We provide a methodology based on the steered molecular dynamics simulations and dynamic force spectroscopy calculations to determine the kinetic and energetic characteristics of hydrogen bonds.

scholarly journals Molecular dynamics simulations of mechanical failure in polymorphic arrangements of amyloid fibrils containing structural defects

2013 ◽  
Vol 4 ◽  
pp. 429-440 ◽  
Author(s):  
Hlengisizwe Ndlovu ◽  
Alison E Ashcroft ◽  
Sheena E Radford ◽  
Sarah A Harris
Keyword(s):  
Mechanical Properties ◽  
Molecular Dynamics ◽  
Molecular Dynamics Simulations ◽  
Amyloid Fibrils ◽  
Amyloid Fibril ◽  
Steered Molecular Dynamics ◽  
Mechanical Failure ◽  
Structural Defects ◽  
Dynamics Simulations

We examine how the different steric packing arrangements found in amyloid fibril polymorphs can modulate their mechanical properties using steered molecular dynamics simulations. Our calculations demonstrate that for fibrils containing structural defects, their ability to resist force in a particular direction can be dominated by both the number and molecular details of the defects that are present. The simulations thereby suggest a hierarchy of factors that govern the mechanical resilience of fibrils, and illustrate the general principles that must be considered when quantifying the mechanical properties of amyloid fibres containing defects.

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