Graphene oxide immobilized enzymes show high thermal and solvent stability

Soňa Hermanová, Marie Zarevúcká, Daniel Bouša, Martin Pumera, Zdeněk Sofer

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121 Citations (Scopus)

Abstract

The thermal and solvent tolerance of enzymes is highly important for their industrial use. We show here that the enzyme lipase from Rhizopus oryzae exhibits exceptionally high thermal stability and high solvent tolerance and even increased activity in acetone when immobilized onto a graphene oxide (GO) nanosupport prepared by Staudenmaier and Brodie methods. We studied various forms of immobilization of the enzyme: by physical adsorption, covalent attachment, and additional crosslinking. The activity recovery was shown to be dependent on the support type, enzyme loading and immobilization procedure. Covalently immobilized lipase showed significantly better resistance to heat inactivation (the activity recovery was 65% at 70 °C) in comparison with the soluble counterpart (the activity recovery was 65% at 40 °C). Physically adsorbed lipase achieved over 100% of the initial activity in a series of organic solvents. These findings, showing enhanced thermal stability and solvent tolerance of graphene oxide immobilized enzyme, will have a profound impact on practical industrial scale uses of enzymes for the conversion of lipids into fuels. This journal is

Original languageEnglish
Pages (from-to)5852-5858
Number of pages7
JournalNanoscale
Volume7
Issue number13
DOIs
Publication statusPublished - 2015 Apr 7

All Science Journal Classification (ASJC) codes

  • Materials Science(all)

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    Hermanová, S., Zarevúcká, M., Bouša, D., Pumera, M., & Sofer, Z. (2015). Graphene oxide immobilized enzymes show high thermal and solvent stability. Nanoscale, 7(13), 5852-5858. https://doi.org/10.1039/c5nr00438a