| Literature DB >> 25187134 |
Withu Choosri1, Regina Paukner, Petra Wührer, Dietmar Haltrich, Christian Leitner.
Abstract
The gene gaoA encoding the copper-dependent enzyme galactose oxidase (GAO) from Fusarium graminearum PH-1 was cloned and successfully overexpressed in E. coli. Culture conditions for cultivations in shaken flasks were optimized, and optimal conditions were found to be double-strength LB medium, 0.5% lactose as inducer, and induction at the reduced temperature of 25°C. When using these cultivation conditions ~24 mg of active GAO could be produced in shaken flasks per litre medium. Addition of copper to the fermentation medium decreased the enzyme production significantly. The His-tagged recombinant enzyme could be purified conveniently with a single affinity chromatography step. The purified enzyme showed a single band on SDS-PAGE with an apparent molecular mass of 66 kDa and had kinetic properties similar to those of the fungal wild-type enzyme.Entities:
Year: 2010 PMID: 25187134 PMCID: PMC4410317 DOI: 10.1007/s11274-010-0585-2
Source DB: PubMed Journal: World J Microbiol Biotechnol ISSN: 0959-3993 Impact factor: 3.312