Related Experiment Video
Updated: May 3, 2026
08:50
High-Speed Magnetic Tweezers for Nanomechanical Measurements on Force-Sensitive Elements
Published on: May 12, 2023
3.1K
Time-resolved force distribution analysis
Bogdan I Costescu, Frauke Gräter1
1Heidelberg Institute for Theoretical Studies, Schloss-Wolfsbrunnenweg 35, 69118 Heidelberg, Germany. frauke.graeter@h-its.org.
BMC Biophysics
|February 7, 2014
Summary
We developed Time-Resolved Force Distribution Analysis (TRFDA) to track atomic-level forces during biomolecular conformational changes. This method efficiently analyzes large molecular dynamics simulations, revealing insights into molecular interactions and dynamics.
Area of Science:
- Computational Biology
- Biophysics
- Molecular Dynamics Simulations
Background:
- Biomolecules undergo conformational changes due to external forces like ligand binding.
- Analyzing these dynamic transitions requires methods to track atomic-level forces.
Purpose of the Study:
- To develop an efficient computational method for analyzing pairwise forces during molecular conformational changes.
- To enable time-series analysis of force variations in large molecular dynamics simulations.
Main Methods:
- Developed Time-Resolved Force Distribution Analysis (TRFDA).
- Focused on computational efficiency and low-memory usage.
- Implemented exact decomposition of forces from 3- and 4-body potentials.
- Applied TRFDA to analyze ubiquitin unfolding in a force-clamp simulation.
Main Results:
- TRFDA enables efficient time-series analysis of pairwise forces in large molecular systems.
- The method provides a unified treatment of forces between atoms or residues.
- Demonstrated proof-of-concept with stress analysis during ubiquitin unfolding.
Conclusions:
- TRFDA is valuable for tracking atomic-level signal propagation.
- Enables characterization of dynamical intermolecular interactions, such as protein-ligand binding.
- Useful for force field development and analyzing stress distribution during conformational changes.
Related Concept Videos
01:21Distributed Loads: Problem Solving
1.3K
Beams are structural elements commonly employed in engineering applications requiring different load-carrying capacities. The first step in analyzing a beam under a distributed load is to simplify the problem by dividing the load into smaller regions, which allows one to consider each region separately and calculate the magnitude of the equivalent resultant load acting on each portion of the beam. The magnitude of the equivalent resultant load for each region can be determined by calculating...
1.3K
01:23Relation Between the Distributed Load and Shear
1.2K
Understanding the relationship between the distributed load and shear force in structural analysis is crucial for analyzing beams subjected to various loading conditions. Consider the case of a beam experiencing a distributed load, two concentrated loads, and a couple moment.
1.2K
01:20Two-Dimensional Force System
1.9K
A two-dimensional system in mechanical engineering involves the analysis of motion and forces in a plane. A two-dimensional force vector can be resolved into its components as:
1.9K
01:13Resultant of a General Distributed Loading
1.2K
While designing structures exposed to non-uniform loads, it is crucial to consider the resultant force and its location. This resultant force is a single vector representing the net force applied due to the distributed load.
Examples such as load distribution due to wind and load distribution on a bridge illustrate how this concept is used to analyze and design safe, reliable structures under variable loading conditions. Most structures, such as residential buildings, bridges, and towers, are...
Examples such as load distribution due to wind and load distribution on a bridge illustrate how this concept is used to analyze and design safe, reliable structures under variable loading conditions. Most structures, such as residential buildings, bridges, and towers, are...
1.2K
01:30Method of Sections
1.9K
Consider a truss structure, as shown in the figure.
1.9K
01:30Three-Dimensional Force System
3.2K
In mechanical engineering, a three-dimensional force system is a system of forces acting in three dimensions, with forces applied along the x, y, and z coordinate axes. The three-dimensional force system is an important concept in mechanical engineering, as it allows engineers to understand and analyze the behavior of objects and structures in three dimensions. By understanding the forces acting on a system, engineers can design more efficient and effective mechanical systems that can withstand...
3.2K