화학공학소재연구정보센터
Thin Solid Films, Vol.352, No.1-2, 213-217, 1999
The folding and enzymatic activity of glucose oxidase in the glycolipid matrixes of different charges
The influence of lipid matrixes with different charges on the protein folding behavior has been investigated by using the Langmuir-Blodgett (LB) technique. To understand the conformation change under different forces, Glucose oxidase (GOD) from Aspergilius Niger was used as a protein model. Eight glycolipids(1,2-o-dialkyl-3-o-beta-D-glycosylglycerols and alkyl 2-amino-2-deoxy-beta-D-glucopyranoside) were used as the matrixes for this investigation. It was observed that the GOD can penetrate into neutral glycolipid monolayer and change its conformation in favor of the alpha-helix formation. Moreover, GOD strongly adsorbed to the positive charged glycolipid monolayer and change its conformation in favor of the beta-sheet formation. Enzymatic activity measurements showed that the more the alpha-helix conformation content is in the GOD, the higher activity the GOD will be. This fact suggested a new way to mediate the conformation of protein in organized molecular assemblies, and provided a new thinking for the preparation of biomimetic film and biosensor.