Chemical Modifications of Laccase from White-Rot Basidiomycete Cerrena unicolor
| العنوان: | Chemical Modifications of Laccase from White-Rot Basidiomycete Cerrena unicolor |
|---|---|
| المؤلفون: | Grzegorz Janusz, Jerzy Rogalski, Katarzyna H. Kucharzyk, I. Karczmarczyk |
| المصدر: | Applied Biochemistry and Biotechnology |
| بيانات النشر: | Springer-Verlag, 2012. |
| سنة النشر: | 2012 |
| مصطلحات موضوعية: | Environmental Engineering, Glycosylation, Size-exclusion chromatography, Bioengineering, Cellobiose, Applied Microbiology and Biotechnology, Biochemistry, Article, Hydrophilization, Polyporaceae, chemistry.chemical_compound, Enzyme Stability, Cerrena unicolor, Organic chemistry, Phenol, Enzyme Inhibitors, Molecular Biology, Thermostability, Laccase, biology, Temperature, General Medicine, Hydrogen-Ion Concentration, biology.organism_classification, Hydrophobization, Cross-Linking Reagents, chemistry, Fluoride, Hydrophobic and Hydrophilic Interactions, Biotechnology |
| الوصف: | Laccases belong to the group of phenol oxidizes and constitute one of the most promising classes of enzymes for future use in various fields. For industrial and biotechnological purposes, laccases were among the first enzymes providing larger-scale applications such as removal of polyphenols or conversion of toxic compounds. The wood-degrading basidiomycete Cerrena unicolor C-139, reported in this study, is one of the high-laccase producers. In order to facilitate novel and more efficient biocatalytic process applications, there is a need for laccases with improved biochemical properties, such as thermostability or stability in broad ranges of pH. In this work, modifications of laccase isoforms by hydrophobization, hydrophilization, and polymerization were performed. The hydrophobized and hydrophilized enzyme showed enhanced surface activity and higher ranges of pH and temperatures in comparison to its native form. However, performed modifications did not appear to noticeably alter enzyme’s native structure possibly due to the formation of coating by particles of saccharides around the molecule. Additionally, surface charge of modified laccase shifted towards the negative charge for the hydrophobized laccase forms. In all tested modifications, the size exclusion method led to average 80 % inhibition removal for hydrophilized samples after an hour of incubation with fluoride ions. Samples that were hydrophilized with lactose and cellobiose showed an additional 90 % reversibility of inhibition by fluoride ions after an hour of concluding the reaction and 40 % after 24 h. The hydrophobized laccase showed higher level of the reversibility after 1 h (above 80 %) and 24 h (above 70 %) incubation with fluoride ions. The addition of ascorbate to laccase solution before a fluoride spike resulted in more efficient reversibility of fluoride inhibitory effect in comparison to the treatments with reagents used in the reversed sequence. |
| اللغة: | English |
| تدمد: | 1559-0291 0273-2289 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a4d653c03bae29af922db92f29d9aa33 http://europepmc.org/articles/PMC3514700 |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....a4d653c03bae29af922db92f29d9aa33 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 15590291 02732289 |
|---|