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Escherichia coli’s OmpA as Biosurfactant for Cosmetic Industry: Stability Analysis and Experimental Validation Based on Molecular Simulations

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Part of the Advances in Intelligent Systems and Computing book series (AISC,volume 232)

Abstract

The development of biosurfactants has increased due to their biodegradability, low toxicity and specificity. The aim of this work is to analyze the behavior of the outer membrane protein A (OmpA) of Escherichia coli by Molecular Dynamics simulations and to perform experimental validation when used as stabilizer for dodecane/water emulsions. Trajectories were analyzed with the analysis tools provided by the GROMACS package. OmpA was purified from E. coli K-12 W3110/pCA24N strain in medium with isopropylthio- β-galactoside. Oil in water emulsions with different concentrations of OmpA were prepared in batch processes. MD trajectories with OmpA reached stability after 1 ns with an average RMSD value of 5.6 nm and they showed that OmpA remains stable in emulsion. An inverse effect related to protein concentration was found on the stability of the emulsion. OmpA displayed a significant role as a stabilizer for dodecane/water emulsions as the presence of OmpA increased their stability up to 7.5 h.

Keywords

  • Molecular Dynamics
  • OmpA
  • E. coli
  • biosurfactant
  • emulsions

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Correspondence to Sonia Milena Aguilera Segura .

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Segura, S.M.A. et al. (2014). Escherichia coli’s OmpA as Biosurfactant for Cosmetic Industry: Stability Analysis and Experimental Validation Based on Molecular Simulations. In: Castillo, L., Cristancho, M., Isaza, G., Pinzón, A., Rodríguez, J. (eds) Advances in Computational Biology. Advances in Intelligent Systems and Computing, vol 232. Springer, Cham. https://doi.org/10.1007/978-3-319-01568-2_38

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  • DOI: https://doi.org/10.1007/978-3-319-01568-2_38

  • Publisher Name: Springer, Cham

  • Print ISBN: 978-3-319-01567-5

  • Online ISBN: 978-3-319-01568-2

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