Skip to Main content Skip to Navigation
Journal articles

Shifting-Nitroxides to Investigate Enzymatic Hydrolysis of Fatty Acids by Lipases Using Electron Paramagnetic Resonance in Turbid Media

Abstract : While optical methods are not efficient enough for the easy, fast, and efficient detection of enzymatic activity in turbid media, the properties of the electron paramagnetic resonance (EPR) technique make it suitable for use in such media. Nitroxides which exhibit a change in their EPR hyperfine coupling constants upon enzymatic activity and are selective to lipases were developed under the name of shifting-nitroxides. Several fatty acids, exhibiting saturated and unsaturated chains of various lengths, were coupled with the shifting-nitroxide via an enol ester link and tested against several lipases. As the solubility of fatty acids is low in HEPES buffer, experiments were performed in turbid aqueous solution. Almost all labeled fatty acids were hydrolyzed by Candida rugosa lipase, and more selectivity is observed with Porcine Pancreas lipase type II. No activity was observed for lipase AK Amano 20, Candida antartica lipase B, and Mucor miehei lipase.
Document type :
Journal articles
Complete list of metadatas

Cited literature [2 references]  Display  Hide  Download

https://hal-cnrs.archives-ouvertes.fr/hal-02472334
Contributor : Karine Viaud <>
Submitted on : Wednesday, February 12, 2020 - 8:27:33 AM
Last modification on : Saturday, October 10, 2020 - 3:07:59 AM

Links full text

Identifiers

Collections

Citation

Gérard Audran, Samuel Jacoutot, Natacha Jugniot, Sylvain Marque, Philippe Mellet. Shifting-Nitroxides to Investigate Enzymatic Hydrolysis of Fatty Acids by Lipases Using Electron Paramagnetic Resonance in Turbid Media. Analytical Chemistry, American Chemical Society, 2019, 91 (9), pp.5504-5507. ⟨10.1021/acs.analchem.9b00561⟩. ⟨hal-02472334⟩

Share

Metrics

Record views

61