Properties and some in vitro studies of 6-phosphogluconate dehydrogenase purified from the liver of Chalcalburnus tarichi, the only fish living in Lake Van's highly alkaline water (pH 9.8)

Authors

MUHAMMET GÜLER
VEDAT TÜRKOĞLU
MEHMET RIZA KIVANÇ

DOI

10.3906/kim-1502-68

Abstract

In this study, some enzymology parameters and some antibiotics affecting the enzyme activity of 6-phosphogluconate dehydrogenase (6PGD) extracted from t the livers of fish from Lake Van (\textit{Chalcalburnus tarichi}) were investigated because it is an important enzyme-producing NADPH, a reductive power, protecting the cell against the oxidative agents by producing reduced glutathione. The crude enzyme solution was obtained by using the affinity chromatography method. The native molecular weight of the enzyme is $\sim $90,000 $\pm $ 3000 Da and it is composed of two subunits with identical molecular weights of $\sim $46,000 Da as exhibited on sodium dodecyl sulfate-polyacrylamide gel electrophoresis. The pH and temperature for optimal conditions of 6PGD were about 8.5 and 40 $^{\circ}$C, respectively, and the enzyme showed optimal activity in 40 mM ammonium sulfate solution. In addition, in vitro effects of clindamycin phosphate, streptomycin sulfate, and lincomycin antibiotics on the enzyme activity were investigated.

Keywords

Enzyme purification, affinity chromatography, antibiotic, enzyme inhibition

First Page

1050

Last Page

1058

Recommended Citation

GÜLER, MUHAMMET; TÜRKOĞLU, VEDAT; and KIVANÇ, MEHMET RIZA (2015) "Properties and some in vitro studies of 6-phosphogluconate dehydrogenase purified from the liver of Chalcalburnus tarichi, the only fish living in Lake Van's highly alkaline water (pH 9.8)," Turkish Journal of Chemistry: Vol. 39: No. 5, Article 12. https://doi.org/10.3906/kim-1502-68
Available at: https://journals.tubitak.gov.tr/chem/vol39/iss5/12