title: Immobilization and stability of a Rhizopus oryzae lipase expressed in Pichia pastoris: comparison between native and recombinant variants.
abstract: The stability of a soluble extract containing a recombinant lipase from Rhizopus oryzae (Cursive) lipase (rROL) produced by Pichia pastoris (Cursive), as well as that for the commercial extract containing the lipase produced by the native organism (nROL), was investigated. The results showed higher residual activity values of the commercial protein compared with the recombinant one. Moreover, two different kinds of support, the polypropylene powder EP100 and Eupergit®C, were tested to immobilize the enzymes. The residual activity of the immobilizated derivatives was also tested to determine whether their stability was enhanced. The results showed a slight improvement in rROL using both supports but a decrease in nROL using Eupergit®C. The study of the residual activity of soluble and immobilized enzymes was performed by means of a central composite rotatable experiment design. In addition, EP100 adsorption isotherms were determined.
authors.affiliation: Dept. d'Enginyeria Química, EE, Universitat Autònoma de Barcelona, Bellaterra, Barcelona 08193, Spain.
authors.forename: Marina
authors.initials: M
authors.lastname: Guillén
authors.forename: Maria Dolors
authors.initials: MD
authors.lastname: Benaiges
authors.forename: Francisco
authors.initials: F
authors.lastname: Valero
mesh_terms: D000327:Adsorption; D003124:Colorimetry; D004795:Enzyme Stability; D004800:Enzymes, Immobilized / Q000378:metabolism*; D008049:Lipase / Q000378:metabolism*; D011994:Recombinant Proteins / Q000378:metabolism; D012233:Rhizopus / Q000201:enzymology*; D012995:Solubility
chemical_list: D004800:Enzymes, Immobilized; D011994:Recombinant Proteins; D008049:Lipase