Lipases at interfaces: Unique interfacial properties as globular proteins
Artikel i vetenskaplig tidskrift, 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.

Författare

Pedro Reis

Chalmers, Kemi- och bioteknik, Teknisk ytkemi

Reinhard Miller

Max Planck-institutet

Jurgen Krägel

Max Planck-institutet

Martin Leser

Nestle S.A.

Verner Fainerman

Donetsk State Medical University

Heribert Watzke

Nestle S.A.

Krister Holmberg

Chalmers, Kemi- och bioteknik, Teknisk ytkemi

Langmuir

0743-7463 (ISSN) 1520-5827 (eISSN)

Vol. 24 13 6812-6819

Ämneskategorier

Kemiteknik

Annan kemi

Kemi

DOI

10.1021/la704044k