title: Catalytic activity of refolded penicillin acylase subunits in aqueous solution and aerosol ot reversed micelles in octane.
abstract: Refolded alpha and beta subunits of penicillin acylase were produced by gel-filtration under denaturing conditions followed by removal of urea through dialysis. Preparations of both renatured subunits hidrolysed specific substrate--phenylacetic acid p-nitroanilide in buffer and in the system of Aerosol OT reversed micelles, the alpha subunit being most catalytically active at Wo = 11.9, while the beta subunit--at Wo = 17.5. There was a good correlation between the position of the found maxima, the theoretically calculated optimal hydration degrees as well as the earlier reported profile of enzymatic activity for native enzyme in reversed micelles.
authors.affiliation: Department of Chemical Enzymology, Moscow State University, Russia.
authors.forename: V E
authors.initials: VE
authors.lastname: Kabakov
authors.forename: N L
authors.initials: NL
authors.lastname: Klyachko
authors.forename: A V
authors.initials: AV
authors.lastname: Levashov
mesh_terms: D000814:Aniline Compounds / Q000378:metabolism; D044482:Benzeneacetamides; D002021:Buffers; D002384:Catalysis; D002850:Chromatography, Gel; D002863:Chromogenic Compounds / Q000378:metabolism; D004143:Dioctyl Sulfosuccinic Acid / Q000737:chemistry* / Q000378:metabolism; D004591:Electrophoresis, Polyacrylamide Gel; D004926:Escherichia coli / Q000201:enzymology; D006868:Hydrolysis; D008823:Micelles; D009795:Octanes / Q000737:chemistry*; D010399:Penicillin Amidase / Q000737:chemistry / Q000302:isolation & purification / Q000378:metabolism*; D017510:Protein Folding; D013379:Substrate Specificity; D013501:Surface-Active Agents / Q000737:chemistry* / Q000378:metabolism; D014508:Urea / Q000737:chemistry
chemical_list: D000814:Aniline Compounds; D044482:Benzeneacetamides; D002021:Buffers; D002863:Chromogenic Compounds; D008823:Micelles; D009795:Octanes; D013501:Surface-Active Agents; D004143:Dioctyl Sulfosuccinic Acid; C010415:N-phenylacetyl-4-nitroaniline; D014508:Urea; D010399:Penicillin Amidase; C026728:octane