Purification and characterization glutathione S-transferase enzyme from quail (Coturnix, coturnix japonica) heart and investigation the effect of some metal ions on enzyme activity
Abstract
In this study glutathione S-transferase enzyme (EC: 2.5.1.18) from the
heart of japonica quail was purified with 34.0 EU/mg specific activity, 10.44% purification yield and 78.29 purification folds
and characterized. Purification processes are consist of three steps, firstly
homogenate was prepared, and then ammonium sulfate precipitation was performed
and finally glutathione-agarose gel affinity column chromatography was
performed. To check the purity of GST enzyme used SDS-PAGE method. Then the M.W
calculated at approximately 26.3 kDa by SDS-PAGE method. Enzymatic activity was
determined spectrofotometrically according to Beutler`s method at 340 nm. Also
characterizations study carry out, and the results obtained are stability-pH =
9.0 in Tris/HCL buffer, optimum pH = 8.0 in Tris/HCl buffer, optimum
temperature 60 °C, optimum ionic strength was 1.2 M in Tris/HCl buffer. And
kinetic studies performed for GST enzyme purified from quail heart by used both
glutathione and 1-chloro 2,4-dinitrobenzen as substrate. KM and Vmax
values are determined as 1.642 mM and 0.502 EU/mL respectively for GSH
substrate and 3.880 mM and 0.588 EU/mL respectively for CDNB substrate. In addition,
the effect of some metal ions (Cu2+, Cd2+, Fe2+,
Fe3+ Zn2+, Ag+, Co2+, and Ti1+)
were investigated on the GST enzyme activity in vitro.
Keywords
References
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Details
Primary Language
English
Subjects
-
Journal Section
Research Article
Publication Date
December 31, 2019
Submission Date
December 12, 2018
Acceptance Date
May 13, 2019
Published in Issue
Year 2019 Volume: 40 Number: 4
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