Abstract
At nanoscale, atomistic simulation is widely used for investigating crystalline chitin fibers, the structural component for many biological materials. However, the longitudinal dimension of naturally occurring chitin fibers exceeds hundreds of nanometer, beyond the investigation range of all-atom simulation due to the limitation of computational power. Under this context, coarse-grained simulation is a useful alternative that facilitates the investigation of a large system. We develop a coarse-grained model for describing the structural and mechanical properties of α-chitin. The developed coarse-grained model can reasonably predict these properties. Moreover, this model is consistent with existing coarse-grained force fields for proteins. The present model of α-chitin possesses good potential and applicability in the investigation of natural chitin-based materials at the length scale of several hundred nanometers.
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Acknowledgment
The authors are grateful to the support from Croucher Foundation through the Start-up Allowance for Croucher Scholars with the Grant No. 9500012, and the support from the Research Grants Council (RGC) in Hong Kong through the Early Career Scheme (ECS) with the Grant No. 139113.
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A file containing the coarse-grained parameters of all the bonds, angles dihedrals as well as the non-bonded interactions is available online along with the electronic version. The settings of coarse-grained protein models are referred from online coarse-graining tutorial (http://www.ks.uiuc.edu/Training/Tutorials/martini/rbcg-tutorial.pdf). (DOCX 18 kb)
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Yu, Z., Lau, D. Development of a coarse-grained α-chitin model on the basis of MARTINI forcefield. J Mol Model 21, 128 (2015). https://doi.org/10.1007/s00894-015-2670-9
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DOI: https://doi.org/10.1007/s00894-015-2670-9