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Selected Publication:

Arajo, R; Silva, C; O'Neill, A; Micaelo, N; Guebitz, G; Soares, CM; Casal, M; Cavaco-Paulo, A.
(2007): Tailoring cutinase activity towards polyethylene terephthalate and polyamide 6,6 fibers.
J Biotechnol. 2007; 128(4):849-857 FullText FullText_BOKU

Abstract:
Cutinase from Fusarium solani pisi was genetically modified near the active site, by site-directed mutagenesis, to enhance its activity towards polyethylene terephthalate (PET) and polyamide 6,6 (PA 6,6) fibers. The mutations L81A, N84A, L182A, V184A and L189A were done to enlarge the active site in order to better fit a larger polymer chain. Modeling studies have shown enhanced free energy stabilization of model substrate tetrahedral intermediate (TI) bound at the enzyme active site for all mutants, for both model polymers. L81A and L182A showed an activity increase of four- and five-fold, respectively, when compared with the wild type, for PET fibers. L182A showed the one- and two-fold higher ability to biodegrade aliphatic polyamide substrates. Further studies in aliphatic polyesters seem to indicate that cutinase has higher ability to recognize aliphatic substrates. (c) 2007 Elsevier B.V. All rights reserved.
Authors BOKU Wien:
G├╝bitz Georg
Find related publications in this database (using NML MeSH Indexing)
Adsorption -
Biotransformation -
Caprolactam - analogs & derivatives
Carboxylic Ester Hydrolases - chemistry
Fusarium - enzymology
Models, Molecular -
Mutagenesis, Site-Directed -
Polyethylene Terephthalates - chemistry
Polymers - chemistry
Succinates - metabolism

Find related publications in this database (Keywords)
cutinase
biocatalysis
polyester
polyamide 6,6
site-directed mutagenesis


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