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Report Summarizes Nanoscale Research Study Findings from Institute of Food (Controlling enzymatic activity and kinetics in swollen mesophases by...

August 19, 2014

Report Summarizes Nanoscale Research Study Findings from Institute of Food (Controlling enzymatic activity and kinetics in swollen mesophases by physical nano-confinement)

By a News Reporter-Staff News Editor at Life Science Weekly -- Fresh data on Nanoscale Research are presented in a new report. According to news reporting out of Zurich, Switzerland, by NewsRx editors, research stated, "Bicontinuous lipid cubic mesophases are widely investigated as hosting matrices for functional enzymes to build biosensors and bio-devices due to their unique structural characteristics. However, the enzymatic activity within standard mesophases (in-meso) is severely hindered by the relatively small diameter of the mesophase aqueous channels, which provide only limited space for enzymes, and restrict them into a highly confined environment."

Our news journalists obtained a quote from the research from the Institute of Food, "We show that the enzymatic activity of a model enzyme, horseradish peroxidase (HRP), can be accurately controlled by relaxing its confinement within the cubic phases' water channels, when the aqueous channel diameters are systematically swollen with varying amount of hydration-enhancing sugar ester. The in-meso activity and kinetics of HRP are then systematically investigated by UV-vis spectroscopy, as a function of the size of the aqueous mesophase channels. The enzymatic activity of HRP increases with the swelling of the water channels. In swollen mesophases with water channel diameter larger than the HRP size, the enzymatic activity is more than double that measured in standard mesophases, approaching again the enzymatic activity of free HRP in bulk water."

According to the news editors, the research concluded: "We also show that the physically-entrapped enzymes in the mesophases exhibit a restricted-diffusion-induced initial lag period and report the first observation of in-meso enzymatic kinetics significantly deviating from the normal Michaelis-Menten behaviour observed in free solutions, with deviations vanishing when enzyme confinement is released by swelling the mesophase."

For more information on this research see: Controlling enzymatic activity and kinetics in swollen mesophases by physical nano-confinement. Nanoscale, 2014;6(12):6853-9. (Royal Society of Chemistry -; Nanoscale -

Our news journalists report that additional information may be obtained by contacting W. Sun, ETH Zurich, Food and Soft Materials Science, Institute of Food, Nutrition & Health, Dept. of Health Science and Technology, Schmelzbergstrasse 9, CH-8092 Zurich, Switzerland. Additional authors for this research include J.J. Vallooran, A. Zabara and R. Mezzenga (see also Nanoscale Research).

Keywords for this news article include: Zurich, Europe, Switzerland, Nanoscale Research.

Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2014, NewsRx LLC

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Source: Life Science Weekly

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