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Adsorption of fibronectin fragment on surfaces using fully atomistic molecular dynamics simulations

Liamas, Evangelos and Kubiak-Ossowska, Karina and Black, Richard A. and Thomas, Owen R.T. and Zhang, Zhenyu J. and Mulheran, Paul A. (2018) Adsorption of fibronectin fragment on surfaces using fully atomistic molecular dynamics simulations. International Journal of Molecular Sciences, 19 (11). ISSN 1422-0067

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Abstract

The effect of surface chemistry on the adsorption characteristics of a fibronectin fragment (FNIII8⁻10) was investigated using fully atomistic molecular dynamics simulations. Model surfaces were constructed to replicate self-assembled monolayers terminated with methyl, hydroxyl, amine, and carboxyl moieties. It was found that adsorption of FNIII8⁻10 on charged surfaces is rapid, specific, and driven by electrostatic interactions, and that the anchoring residues are either polar uncharged or of opposing charge to that of the targeted surfaces. On charged surfaces the presence of a strongly bound layer of water molecules and ions hinders FNIII8⁻10 adsorption. In contrast, adsorption kinetics on uncharged surfaces are slow and non-specific, as they are driven by van der Waals interactions, and the anchoring residues are polar uncharged. Due to existence of a positively charged area around its cell-binding region, FNIII8⁻10 is available for subsequent cell binding when adsorbed on a positively charged surface, but not when adsorbed on a negatively charged surface. On uncharged surfaces, the availability of the fibronectin fragment's cell-binding region is not clearly distinguished because adsorption is much less specific.

Item type: Article
ID code: 66167
Keywords: explicit solvent, NAMD, protein adsorption, SAMs, self-assembled monolayers, Chemical engineering, Chemical Engineering(all)
Subjects: Technology > Chemical engineering
Department: Faculty of Engineering > Chemical and Process Engineering
Faculty of Engineering > Biomedical Engineering
Depositing user: Pure Administrator
Date deposited: 20 Nov 2018 09:18
Last modified: 01 Apr 2019 09:11
Related URLs:
URI: https://strathprints.strath.ac.uk/id/eprint/66167
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