Naslov
Enhancement of Trigonopsis variabilis D-Amino Acid Oxidase Overproduction in Fed-batch Cultivation of Escherichia coli

Autori
Stanzer, Damir ; Mrvčić, Jasna ; Križanović, Stela ; Stehlik-Tomas, Vesna ; Grba, Slobodan

Izvornik
Chemical and biochemical engeenering quartely (0352-9568) 25 (2011), 4; 513-517

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
D-Amino acid oxidase; Trigonopsis variabilis; Escherichia coli; D-methionine

Sažetak
D-Amino acid oxidase is a key enzyme in the production of semisynthetic cephalosporins. The Trigonopsis variabilis D-amino acid oxidase with 12- amino-acid peptide at N-terminus was expressed in Escherichia coli BL21(DE3), in a series of short fed-batch cultivations. The strategy of gradual induction and gradual feeding with D-methionine during expression resulted in active enzyme production twice as high as that in which the inducer and methionine were added all at once at the expression start. In optimal conditions during 14 h of aerobic cultivation, 350 mg/L of active enzyme was produced.

Izvorni jezik
Engleski

Znanstvena područja
Biotehnologija, Prehrambena tehnologija

POVEZANOST RADA