Nitrilases are enzymes able to convert toxic nitriles to corresponding carboxylic acids or amides. Thus they might be used in the detoxification of dyes, herbicides and pharmaceutical intermediates and byproducts. They can be used also for enzymatic syntheses of carboxylic acids not available by standard procedures. The aim of this diploma thesis is a recombinant expression of nitrilases from Neurospora crassa and the optimization of their purification. Cells of E. coli (BL 21 Gold) were utilized as an expression system. The purification was performed by ion-exchange chromatography, chelation chromatography and gel filtration - all under reducing conditions. Purified enzymes were studied by sedimentation analysis in an analytical ultracentrifuge. They were also used for searching of optimal conditions for their crystallization. Keywords: nitrilase, Neurospora crassa, recombinant expression
| Identifer | oai:union.ndltd.org:nusl.cz/oai:invenio.nusl.cz:337332 |
| Date | January 2014 |
| Creators | Zawadová, Dorota |
| Contributors | Vaněk, Ondřej, Kavan, Daniel |
| Source Sets | Czech ETDs |
| Language | Czech |
| Detected Language | English |
| Type | info:eu-repo/semantics/masterThesis |
| Rights | info:eu-repo/semantics/restrictedAccess |
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