cDNA cloning and expression analysis of the catalytic subunit of glutamate cysteine ligase gene in an annelid polychaete after cadmium exposure: A potential tool for pollution biomonitoring
| Autor: | Juliana Zomer Sandrini, Terumi Hatanaka, Luis Fernando Marins, José Maria Monserrat, Jomar Pereira Laurino |
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| Rok vydání: | 2006 |
| Předmět: |
DNA
Complementary Physiology Glutamate-Cysteine Ligase Health Toxicology and Mutagenesis Protein subunit Molecular Sequence Data Gene Expression Biology Toxicology Biochemistry chemistry.chemical_compound Complementary DNA Gene expression Animals Amino Acid Sequence Cloning Molecular Peptide sequence Phylogeny chemistry.chemical_classification Base Sequence GCLM Polychaeta Cell Biology General Medicine Glutathione Molecular biology Amino acid GCLC chemistry Environmental Pollutants Biomarkers Cadmium Environmental Monitoring |
| Zdroj: | Comparative Biochemistry and Physiology Part C: Toxicology & Pharmacology. 143:410-415 |
| ISSN: | 1532-0456 |
| DOI: | 10.1016/j.cbpc.2006.04.004 |
| Popis: | The enzyme glutamate cysteine ligase (GCL) is the rate-limiting enzyme in glutathione (GSH) synthesis and is formed by a catalytic (GCLC) and a modulatory subunit (GCLM). Some studies have demonstrated that environmental pollutants can regulate the expression of these subunits. Despite the importance of these genes in toxicological responses, no sequences are available for the GCL subunits in annelids. The present study reports, for the first time, the cDNA sequence for the GCLC in an annelid species, the polychaete Laeonereis acuta (Nereididae). The deduced amino acid sequence of L. acuta GCLC showed homology with other animal species, and was used to infer a phylogenetic tree with GCLC amino acid sequences from other taxonomic groups. Exposure to cadmium (100 and 1000 microg Cd/L) during 14 days augmented the level of L. acuta GCLC transcripts in a dose-dependent manner. These gene expression results can be related to the known cadmium effect on GSH depletion. Since a number of contaminants can also exert their toxicity through this mechanism, GCLC gene expression might be applied not only for cadmium biomonitoring, but also for a wide range of contaminants that directly or indirectly promote the same effect in the cellular GSH content. |
| Databáze: | OpenAIRE |
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