Abstract
Expression of maize 9-lipoxygenase was performed and optimized in Escherichia coli Rosetta(DE3)pLysS. The purity of recombinant protein obtained during Q-Sepharose and Octyl-Sepharose chromatographies in an LP system at 4°C was >95%. Maximum activity of the lipoxygenase reaction was observed at pH 7.5. Enzyme stability was studied at pH 4.5 to 9.5 and in the presence of different compounds: phenylmethanesulfonyl fluoride, β-mercaptoethanol, ammonium sulfate, and glycerol. HPLC and GC-MS analysis showed that enzyme produced 99% 9S-hydroperoxide from linoleic acid. 13-Hydroperoxide (less than 1%) consisted of S- and R-enantiomers in ratio 2 : 3.
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Abbreviations
- GC-MS:
-
gas chromatography-mass spectrometry
- HPLC:
-
high performance liquid chromatography
- IPTG:
-
isopropyl β-D-1-thiogalactopyranoside
- LB:
-
Luria-Bertani (medium)
- PMSF:
-
phenylmethanesulfonyl fluoride
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Published in Russian in Biokhimiya, 2010, Vol. 75, No. 7, pp. 978–983.
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Osipova, E.V., Chechetkin, I.R., Gogolev, Y.V. et al. Recombinant maize 9-lipoxygenase: Expression, purification, and properties. Biochemistry Moscow 75, 861–865 (2010). https://doi.org/10.1134/S0006297910070072
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DOI: https://doi.org/10.1134/S0006297910070072