Purification and biochemical properties of glutathione S-transferase from Oryza sativa
- Authors
- Hong, Seung-Hoon; Park, Hee-Joong; Kong, Kwang-Hoon
- Issue Date
- Jan-1999
- Publisher
- ELSEVIER SCIENCE INC
- Keywords
- enzymatic characterization; glutathione S-transferase; homodimer; 4-nitrophenethyl bromide; Oryza sativa; purification; rice; substrate specificity
- Citation
- COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY B-BIOCHEMISTRY & MOLECULAR BIOLOGY, v.122, no.1, pp 21 - 27
- Pages
- 7
- Journal Title
- COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY B-BIOCHEMISTRY & MOLECULAR BIOLOGY
- Volume
- 122
- Number
- 1
- Start Page
- 21
- End Page
- 27
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/25433
- DOI
- 10.1016/S0305-0491(98)10135-9
- ISSN
- 1096-4959
1879-1107
- Abstract
- A glutathione S-transferase (GST) from Oryza sativa was purified to electrophoretic homogeneity approximately 742-fold with a 16% activity yield by DEAE-Sephacel and glutathione (GSH)-Sepharose column chromatography. The molecular weight of the enzyme was determined to be approximate to 23 000 by SDS-polyacrylamide gel electrophoresis and 48 000 by gel chromatography, indicating a homodimeric structure. The pI value of the enzyme was 6.4 by chromatofocusing using a Mono P column and the optimum pH was 7.5. The enzyme was retained on GSH affinity column and its K-m value for GSH was 0.36 mM. The activity of the enzyme was significantly inhibited by S-hexyl-GSH and S-(2,4-dinitrophenyl)glutathione. The enzyme displayed activity towards 1-chloro-2,4-dinitrobenzene, a general GST substrate and high activities towards 4-nitrophenethyl bromide and 1,2-epoxy-3-(p-nitrophenoxy) propane, a marker substrate for the theta-class GSTs. It also exhibited glutathione peroxidase activity toward cumene hydroperoxide. (C) 1999 Elsevier Science Inc. All rights reserved.
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