Developing an unfolding-incorporated coarse-grained polymer model for fibrinogen to study the mechanical behaviour

Authors

Vivek Sharma, Bennett University, IndiaFollow
Poulomi Sadhukhan, Bennett University, IndiaFollow

Author ORCID Identifier

0000-0003-0417-9805

Abstract

Fibrinogen is a protein found in blood that forms Fibrin polymer network to build a clot during wound healing process when there is a cut in the blood vessel. The fibrin fiber is highly stretchable and shows a complex mechanical properties. The fibrin monomer, Fibrinogen, has a very complex structure which is responsible for its unusual elastic behaviour. In this work, we focus on mechanism of unfolding of D-domain of Fibrinogen, and study its effect in the mechanical behaviour. We develop a coarse-grained (CG) bead-spring model for Fibrinogen which captures the unfolding of folded D-domains along with other necessary structural properties which affect the mechanical behaviour. The results from our unfolding-incorporated coarse-grained polymer (UCGP) model matches with the experimental results. This model has capacity to serve as the minimal unit to build a large-scale hierarchical structure of fibrin fiber and network to possibly unfold the mystery of fibrin's unusual elastic behaviour. This model can also be used for other polymers having folded domains or sacrificial bonds.

Recommended Citation

Sharma, Vivek and Sadhukhan, Poulomi (2025) "Developing an unfolding-incorporated coarse-grained polymer model for fibrinogen to study the mechanical behaviour," Northeast Journal of Complex Systems (NEJCS): Vol. 7 : No. 1 , Article 10.
DOI: https://doi.org/10.63562/2577-8439.1091
Available at: https://orb.binghamton.edu/nejcs/vol7/iss1/10