Connected Component Analysis of Dynamical Perturbation Contact Networks
Aria Gheeraert1,2, Claire Lesieur3,4, Victor S Batista5
1Laboratoire de Mathématiques (LAMA), Université Savoie Mont Blanc, CNRS, 73376 Le Bourget du Lac, France.
The Journal of Physical Chemistry. B
|August 29, 2023
Summary
Connected component analysis (CCA) offers a fast and unbiased method for analyzing protein dynamical networks. This approach effectively identifies allosteric signal propagation in complex biomolecular systems.
Area of Science:
- Biophysics
- Computational Biology
- Structural Biology
Background:
- Analyzing protein dynamics is crucial for understanding biomolecular systems.
- Protein-weighted graphs represent amino acid contacts but are challenging to analyze due to size.
- Identifying key features in these networks is essential for biological insights.
Purpose of the Study:
- To introduce and validate the connected component analysis (CCA) for analyzing dynamical perturbation contact networks (DPCNs).
- To demonstrate CCA's effectiveness in identifying allosteric signal propagation within protein networks.
Main Methods:
- Developed and applied the connected component analysis (CCA) method.
- Utilized CCA to analyze dynamical perturbation contact networks (DPCNs).
- Tested CCA on imidazoleglycerol phosphate synthase (IGPS) and a protein kinase.
Main Results:
- CCA provides fast, robust, and unbiased analysis of DPCNs.
- CCA outperforms traditional clustering methods in capturing allosteric signal propagation.
- CCA effectively reduces network size and highlights signal pathways from effector to active sites.
Conclusions:
- CCA is a transferable and effective tool for analyzing protein-weighted networks.
- The method facilitates the study of allosteric mechanisms in enzymes.
- CCA enhances the understanding of signal transmission in complex protein systems.
Related Concept Videos
01:22Mechanical Systems
231
Mechanical systems are analogous to to electrical networks where springs and masses play similar roles to inductors and capacitors, respectively. A viscous damper in mechanical systems functions similarly to a resistor in electrical networks, dissipating energy. The forces acting on a mass in such systems include an applied force in the direction of motion, counteracted by forces from the spring, a viscous damper, and the mass's acceleration. This interplay of forces is mathematically...
231
01:26Linear Approximation in Frequency Domain
110
Linear systems are characterized by two main properties: superposition and homogeneity. Superposition allows the response to multiple inputs to be the sum of the responses to each individual input. Homogeneity ensures that scaling an input by a scalar results in the response being scaled by the same scalar.
In contrast, nonlinear systems do not inherently possess these properties. However, for small deviations around an operating point, a nonlinear system can often be approximated as linear....
In contrast, nonlinear systems do not inherently possess these properties. However, for small deviations around an operating point, a nonlinear system can often be approximated as linear....
110
01:21Linear Approximation in Time Domain
100
Nonlinear systems often require sophisticated approaches for accurate modeling and analysis, with state-space representation being particularly effective. This method is especially useful for systems where variables and parameters vary with time or operating conditions, such as in a simple pendulum or a translational mechanical system with nonlinear springs.
For a simple pendulum with a mass evenly distributed along its length and the center of mass located at half the pendulum's length,...
For a simple pendulum with a mass evenly distributed along its length and the center of mass located at half the pendulum's length,...
100
01:19Contact-dependent Signaling
44.7K
Contact-dependent signaling, as the name suggests, requires that communicating cells be in direct contact with each other. This is achieved either through receptor-ligand interactions or by specialized cytoplasmic channels that allow the flow of small molecules between cells. In animal cells, channels called gap junctions facilitate contact-dependent signaling in certain tissues, whereas, plasmodesmata perform a similar function in plants.
Gap Junctions
In animal cells, gap junctions are formed...
Gap Junctions
In animal cells, gap junctions are formed...
44.7K
01:14Stability of structures
195
In mechanical engineering, the stability of systems under various forces is critical for designing durable and efficient structures. One fundamental way to explore these concepts is by analyzing systems like two rods connected at a pivot point, O, with a torsional spring of spring constant k at the pivot point. This system is similar in appearance to a scissor jack used to change tires on a car. In this case, the arms of the linkage (equivalent to the rods in this system) are entirely vertical,...
195
01:14Node Analysis for AC Circuits
348
Consider an angioplasty system featuring a catheter equipped with a turbine, a critical tool for removing plaque deposits from coronary arteries. This intricate medical device operates using a circuit model reminiscent of a dual-node RLC circuit powered by a current-controlled voltage source.
To unravel the complexities of this system, nodal analysis is employed, a powerful technique founded on Kirchhoff's current law (KCL), which remains valid for phasors. AC circuits can effectively be...
To unravel the complexities of this system, nodal analysis is employed, a powerful technique founded on Kirchhoff's current law (KCL), which remains valid for phasors. AC circuits can effectively be...
348