Molecular cloning, expression, biochemical characteristics, and biomarker potential of theta class glutathione S-transferase (GST-T) from the polychaete Neanthes succinea
- Authors
- Rhee, Jae-Sung; Lee, Young-Mi; Hwang, Dae-Sik; Won, Eun-Ji; Raisuddin, Sheikh; Shin, Kyung-Hoon; Lee, Jae-Seong
- Issue Date
- Jun-2007
- Publisher
- Elsevier BV
- Keywords
- polychaete; neanthes succinea; glutathione S-transferases; heavy metals; metallothioneins; oxidative stress; biomarker
- Citation
- Aquatic Toxicology, v.83, no.2, pp.104 - 115
- Indexed
- SCIE
SCOPUS
- Journal Title
- Aquatic Toxicology
- Volume
- 83
- Number
- 2
- Start Page
- 104
- End Page
- 115
- URI
- https://scholarworks.bwise.kr/erica/handle/2021.sw.erica/43625
- DOI
- 10.1016/j.aquatox.2007.03.015
- ISSN
- 0166-445X
- Abstract
- We cloned and sequenced the full-length cDNA of a theta class glutathione S-transferase (GST-T) from the polychaete Neanthes succinea. The open reading frame of N. succinea GST-T cDNA was 678 bp and encoded 226 amino acid residues. We generated recombinant N. succinea GST-T by expression in transformed Escherichia coli and studied the kinetic properties as well as the effects of inhibitors, pH, and temperature on N. succinea GST-T. GST-T expression was studied using real-time RT-PCR in response to exposure to the model oxidative stress-inducing agent, CuCl2. Copper induced a concentration-dependant increase in the expression of GST-T. Moreover, polychaetes collected from a heavily contaminated lake near an industrial complex showed significantly higher levels of GST-T expression. Interestingly, the site-collected polychaetes with the highest GST-T mRNA expression levels also showed the highest metallothioneins levels. These results suggest that GST-T in polychaetes may have an antioxidant role and that N. succinea GST-T expression may be a useful biomarker for exposure to environmental contaminants such as copper. Our findings provide a better understanding of the biochemical characteristics of N. succinea GST-T, and elucidate the potential role of GST-T in heavy metal-induced oxidative stress and as a biomarker for environmental contamination. (c) 2007 Elsevier B.V. All rights reserved.
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