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Selected Publication:

Pellis, A; Vastano, M; Quartinello, F; Acero, EH; Guebitz, GM.
(2017): His-Tag Immobilization of Cutinase 1 From Thermobifida cellulosilytica for Solvent-Free Synthesis of Polyesters
BIOTECHNOL J. 2017; 12(10): FullText FullText_BOKU

Abstract:
For many years, lipase B from Candida antarctica (CaLB) was the primary biocatalyst used for enzymatic esterification and polycondensation reactions. More recently, the need for novel biocatalysts with different selectivity has arisen in the biotechnology and biocatalysis fields. The present work describes how the catalytic potential of Thermobifida cellulosilytica cutinase 1 (Thc_Cut 1) was exploited for polyester synthesis. In a first step, Thc_Cut 1 was immobilized on three different carriers, namely Opal, Coral, and Amber, using a novel non-toxic His-tag method based on chelated Fe(III) ions (>99% protein bounded). In a second step, the biocatalyzed synthesis of an array of aliphatic polyesters was conducted. A selectivity chain study in a solvent-free reaction environment showed how, in contrast to CaLB, Thc_Cut 1 presents a certain preference for C-6-C-4 ester-diol combinations reaching monomer conversions up to 78% and M-w of 878 g mol(-1) when the Amber immobilized Thc_Cut 1 was used. The synthetic potential of this cutinase was also tested in organic solvents, showing a marked activity decrease in polar media like that observed for CaLB. Finally, recyclability studies were performed, which showed an excellent stability of the immobilized Thc_Cut 1 (retained activity >94%) over 24 h reaction cycles when a solvent-free workup was used. Concerning a practical application of the biocatalystxxxs preparation, the production of oligomers with M-n values below 10 k Da is usually desired for the production of nanoparticles and for the synthesis of functional pre-polymers for coating applications that can be crosslinked in a second reaction step.
Authors BOKU Wien:
G├╝bitz Georg
Herrero Acero Enrique
Pellis Alessandro
Quartinello Felice
BOKU Gendermonitor:


Find related publications in this database (Keywords)
enzymatic synthesis
cutinases
polyesters
green chemistry
enzyme immobilization


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