Lipases at interfaces: Unique interfacial properties as globular proteins
Journal article, 2008

The adsorption behavior of two globular proteins, lipase from Rhizomucor miehei and β-lactoglobulin, at inert oil/water and air/water interfaces was studied by the pendant drop technique. The kinetics and adsorption isotherms were interpreted for both proteins in different environments. It was found that the adopted mathematical models well describe the adsorption behavior of the proteins at the studied interfaces. One of the main findings is that unique interfacial properties were observed for lipase as compared to the reference β-lactoglobulin. A folded drop with a "skinlike" film was formed for the two proteins after aging followed by compression. This behavior is normally associated with protein unfolding and covalent cross-linking at the interface. Despite this, the lipase activity was not suppressed. By highlighting the unique interfacial properties of lipases, we believe that the presented work contributes to a better understanding of lipase interfacial activation and the mechanisms regulating lipolysis. The results indicate that the understanding of the physical properties of lipases can lead to novel approaches to regulate their activity.

Author

Pedro Reis

Chalmers, Chemical and Biological Engineering, Applied Surface Chemistry

Reinhard Miller

Max Planck Institute

Jurgen Krägel

Max Planck Institute

Martin Leser

Nestle S.A.

Verner Fainerman

Donetsk State Medical University

Heribert Watzke

Nestle S.A.

Krister Holmberg

Chalmers, Chemical and Biological Engineering, Applied Surface Chemistry

Langmuir

07437463 (ISSN) 15205827 (eISSN)

Vol. 24 13 6812-6819

Subject Categories

Chemical Engineering

Other Chemistry Topics

Chemical Sciences

DOI

10.1021/la704044k

More information

Latest update

2/21/2018