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Enzymatic surface hydrolysis of poly(ethylene terephthalate) and bis(benzoyloxy...
Eberl, A.; Heumann, Sonja; Brückner, T.; Araújo, Rita; Paulo, Artur Cavaco; Kaufmann, F.; Kroutil, W.; Gübitz, Georg M.A lipase from Thermomyces lanuginosus and cutinases from Thermobifida fusca and Fusarium solani hydrolysed poly(ethylene terephthalate) (PET) fabrics and films and bis(benzoyloxyethyl) terephthalate (3PET) endo-wise as shown by MALDI-Tof-MS, LC–UVD/MS, cationic dyeing and XPS analysis. Due to interfacial activation of the lipase in the presence of Triton X-100, a seven-fold increase of hydrolysis products relea...
A novel aryl acylamidase from Nocardia farcinica hydrolyses polyamide
Heumann, Sonja; Eberl, A.; Fischer-Colbrie, Gudrun; Pobeheim, Herbert; Kaufmann, F.; Ribitsch, D.; Paulo, Artur Cavaco; Gübitz, Georg M.An alkali stable polyamidase was isolated from a new strain of Nocardia farcinica. The enzyme consists of four subunits with a total molecular weight of 190 kDa. The polyamidase cleaved amide and ester bonds of water insoluble model substrates like adipic acid bishexylamide and bis(benzoyloxyethyl)terephthalate and hydrolyzed different soluble amides to the corresponding acid. Treatment of polyamide 6 with this...
Enzymatic hydrolysis of PTT polymers and oligomers
Eberl, A.; Heumann, Sonja; Kotek, R.; Kaufmann, F.; Mitscher, S.; Paulo, Artur Cavaco; Gübitz, Georg M.Article in Press ; Oligomers and polymers (film, fabrics) of the linear aromatic polyester poly(trimethylene terephthalate) (PTT) were treated with polyesterases from Thermomyces lanuginosus, Penicillium citrinum, Thermobifida fusca and Fusarium solani pisi. The cutinase from T. fusca was found to release the highest amounts of hydrolysis products from PTT materials and was able to open and hydrolyse a cyclic ...
Surface hydrolysis of polyamide with a new polyamidase from Beauveria brongniartii
Almansa, Eva; Heumann, Sonja; Eberl, A.; Kaufmann, F.; Paulo, Artur Cavaco; Gübitz, Georg M.Twelve fungi were screened for the potential of their extracellular enzymes to increase the hydrophilicity of polyamide (PA) materials. The most pronounced increase in hydrophilicity was found for enzymes from Beauveria brongniartii and B. bassiana. The 55 kDa polyamidase from B. brongniartii was purified using ultrafiltration, anion exchange chromatography and size exclusion chromatography. This polyamidase wa...
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