Effects of temperature and glycerol and methanol-feeding profiles on the production of recombinant galactose oxidase in Pichia pastoris
Artikel i vetenskaplig tidskrift, 2014
Optimization of protein production from methanol-induced Pichia pastoris cultures is necessary to ensure high productivity rates and high yields of recombinant proteins. We investigated the effects of temperature and different linear or exponential methanol-feeding rates on the production of recombinant Fusarium graminearum galactose oxidase (EC 1.1.3.9) in a P. pastoris Mut+ strain, under regulation of the AOX1 promoter. We found that low exponential methanol feeding led to 1.5-fold higher volumetric productivity compared to high exponential feeding rates. The duration of glycerol feeding did not affect the subsequent product yield, but longer glycerol feeding led to higher initial biomass concentration, which would reduce the oxygen demand and generate less heat during induction. A linear and a low exponential feeding profile led to productivities in the same range, but the latter was characterized by intense fluctuations in the titers of galactose oxidase and total protein. An exponential feeding profile that has been adapted to the apparent biomass concentration results in more stable cultures, but the concentration of recombinant protein is in the same range as when constant methanol feeding is employed. (c) 2014 The Authors Biotechnology Progress published by Wiley Periodicals, Inc. on behalf of American Institute of Chemical Engineers Biotechnol. Prog., 30:728-735, 2014
CATALYSIS
MECHANISM
Pichia pastoris
methanol feeding
CONTAINING POLYSACCHARIDES
FED-BATCH
EXPRESSION
V183
optimization
OXIDATION
OPTIMIZATION
1986
galactose oxidase
DIRECTED EVOLUTION
Fusarium graminearum
PROCEEDINGS OF THE SOCIETY FOR EXPERIMENTAL BIOLOGY AND MEDICINE
PEROXIDASE
GLYCOPROTEINS
P244
FAUL SJ
Författare
George E Anasontzis
Chalmers, Kemi- och bioteknik, Industriell Bioteknik
Margarita Salazar Pena
Chalmers, Kemi- och bioteknik, Livsvetenskaper
O. Spadiut
Institut für Verfahrenstechnik
The Royal Institute of Technology (KTH)
H. Brumer
The Royal Institute of Technology (KTH)
The University of British Columbia
Lisbeth Olsson
Chalmers, Kemi- och bioteknik, Industriell Bioteknik
Biotechnology Progress
8756-7938 (ISSN) 1520-6033 (eISSN)
Vol. 30 3 728-735Ämneskategorier (SSIF 2011)
Livsmedelsteknik
Mikrobiologi
DOI
10.1002/btpr.1878