Regulation of the supramolecular structure and the catalytic activity of penicillin acylase from Escherichia coli in the system of reversed micelles of Aerosol OT in octane

FEBS Letters

Kabakov, Vladimir E.¹  Klyachko, Nataliya L.¹  Levashov, Andrey V.¹  Martinek, Karel³  Merker, Steffen² 

[1] Department of Chemical Enzymology, Moscow State University, Moscow, Russia;FZB Biotechnik GmbH, Berlin, Germany;Institute of Organic Chemistry and Biochemistry, Prague, Czecho and Slovak Federal Republic

关键词: Penicillin acylase;    Protein subunit;    Micellar enzymology;    Reversed micelle;    RM;    reversed micelles;    PA;    penicillin acylase;    AOT;    Aerosol OT (sodium bis-(2-ethyl)-sulfosuccinate);    PMSF;    phenylmethanesulfonilfluoride;    PAANA;    phenylacetic acid p-nitroanilide;   

DOI  :  10.1016/0014-5793(92)81104-T

学科分类：生物化学/生物物理

来源: John Wiley & Sons Ltd.

【 摘 要 】

The properties of penicillin acylase from E. coli solubilized by hydrated reversed micelles (RM) of Aerosol OT in octane were studied. The dependence of catalytic activity on the hydration degree, a parameter which determines the size of the micelle inner cavity, has a curve with three optima, each one corresponding to the enzyme functioning either in a dimer form (w_o = 23) or in a form of separate subunits, a heavy one, β, and a light one, α (w_o = 20 and 14, respectively). The reversible dissociation of the enzyme was confirmed by ultracentrifugation followed by electrophoresis.

【 授权许可】

Unknown