Preparation and evaluation of xylose palmitate ester using Candida antarctica lipase B as a reusable biocatalyst
نویسندگان
چکیده
منابع مشابه
Solvent as a competitive inhibitor for Candida antarctica lipase B.
In enzyme-catalyzed reactions, the choice of solvent often has a marked effect on the reaction outcome. In this paper, it is shown that solvent effects could be explained by the ability of the solvent to act as a competitive inhibitor to the substrate. Experimentally, the effect of six solvents, 2-pentanone, 3-pentanone, 2-methyl-2-pentanol, 3-methyl-3-pentanol, 2-methylpentane and 3-methylpent...
متن کاملRational redesign of Candida antarctica lipase B
This thesis describes the use of rational redesign to modify the properties of the enzyme Candida antarctica lipase B. Through carefully selected single-point mutations, we were able to introduce substrate-assisted catalysis and to alter the reaction specificity. Other single-point mutations afforded variants with greatly changed substrate selectivity and enantioselectivity. Mutation of the cat...
متن کاملLipase B from Candida antarctica Immobilized on a Silica-Lignin Matrix as a Stable and Reusable Biocatalytic System
A study was conducted of the possible use of a silica-lignin hybrid as a novel support for the immobilization of lipase B from Candida antarctica. Results obtained by elemental analysis, Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), and atomic force microscopy (AFM), as well as the determination of changes in porous structure parameters, confirmed the e...
متن کاملA novel self-activation mechanism of Candida antarctica lipase B.
Candida antarctica lipase B (CalB), resembling many other lipases structure-wise, contains a flexible lid that undergoes a surprisingly large conformational change when catalyzing hydrophobic substrates (e.g. triglycerides). Despite extensive and important applications in industry, it is so far still elusive whether CalB can be activated on a hydrophobic surface, like other lipases. From large-...
متن کاملSol-gel entrapped Candida antarctica lipase B--a biocatalyst with excellent stability for kinetic resolution of secondary alcohols.
Sol-gel entrapment is an efficient immobilization technique that allows preparation of robust and highly stable biocatalysts. Lipase from Candida antarctica B was immobilized by sol-gel entrapment and by sol-gel entrapment combined with adsorption on Celite 545, using a ternary silane precursor system. After optimization of the immobilization protocol, the best enzyme loading was 17.4 mg/g supp...
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ژورنال
عنوان ژورنال: Egyptian Journal of Chemistry
سال: 2018
ISSN: 2357-0245
DOI: 10.21608/ejchem.2018.5160.1458