PMID- 27291351 OWN - NLM STAT- MEDLINE DCOM- 20170301 LR - 20170302 IS - 1095-9947 (Electronic) IS - 1050-4648 (Linking) VI - 55 DP - 2016 Aug TI - Response of selenium-dependent glutathione peroxidase in the freshwater bivalve Anodonta woodiana exposed to 2,4-dichlorophenol,2,4,6-trichlorophenol and pentachlorophenol. PG - 499-509 LID - S1050-4648(16)30372-2 [pii] LID - 10.1016/j.fsi.2016.06.012 [doi] AB - 2,4-dichlorophenol (2,4-DCP), 2,4,6-trichlorophenol (2,4,6-TCP), and pentachlorophenol (PCP) pose a health risk to aquatic organism and humans, and are recognized as persistent priority pollutants. Selenium dependent glutathione peroxidase (Se-GPx) belongs to the family of selenoprotein, which acts mainly as an antioxidant role in the cellular defense system. In the current study, a Se-GPx full length cDNA was cloned from Anodonta woodiana and named as AwSeGPx. It had a characteristic codon at 165TGA167 that corresponds to selenocysteine(Sec) amino acid as U44. The full length cDNA consists of 870 bp, an open reading frame (ORF) of 585 bp encoded a polypeptide of 195 amino in which conserved domain (68LGFPCNQF75) and a glutathione peroxide-1 GPx active site (32GKVILVENVASLUGTT47) were observed. Additionally, the eukaryotic selenocysteine insertion sequence (SECIS) was conserved in the 3'UTR. The AwSeGPx amino acid sequence exhibited a high similarity with that of other Se-GPx. Real-time PCR analysis revealed that AwSeGPx mRNA had a widely distribution, but the highest level was observed in hepatopancreas. AwSeGPx mRNA expression was significantly up-regulated in hepatopancreas, gill and hemocytes after 2,4-DCP, 2,4,6-TCP and PCP exposure. Under similar environment, clams A. woodiana showed a more sensitive to PCP than that of 2,4-DCP and 2,4,6-TCP. These results indicate that AwSeGPx plays a protective role in eliminating oxidative stress derived from 2,4-DCP, 2,4,6-TCP and PCP treatment. CI - Copyright (c) 2016 Elsevier Ltd. All rights reserved. FAU - Xia, Xichao AU - Xia X AD - Basal Medicine Institution of Nanyang Medical College, Nanyang 473041, Henan Province, China; State Key Laboratory of Environmental Chemistry and Eco-toxicology, Research Centre for Eco-environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China. Electronic address: xiaxichao8336@163.com. FAU - Hua, Chunxiu AU - Hua C AD - Basal Medicine Institution of Nanyang Medical College, Nanyang 473041, Henan Province, China. FAU - Xue, Shipeng AU - Xue S AD - Basal Medicine Institution of Nanyang Medical College, Nanyang 473041, Henan Province, China. FAU - Shi, Bingqin AU - Shi B AD - Basal Medicine Institution of Nanyang Medical College, Nanyang 473041, Henan Province, China. FAU - Gui, Gaixia AU - Gui G AD - Basal Medicine Institution of Nanyang Medical College, Nanyang 473041, Henan Province, China. FAU - Zhang, Dongxian AU - Zhang D AD - Basal Medicine Institution of Nanyang Medical College, Nanyang 473041, Henan Province, China. FAU - Wang, Xiying AU - Wang X AD - Basal Medicine Institution of Nanyang Medical College, Nanyang 473041, Henan Province, China. FAU - Guo, Lianghong AU - Guo L AD - State Key Laboratory of Environmental Chemistry and Eco-toxicology, Research Centre for Eco-environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China. Electronic address: lhguo@rcees.ac.cn. LA - eng PT - Journal Article DEP - 20160609 PL - England TA - Fish Shellfish Immunol JT - Fish & shellfish immunology JID - 9505220 RN - 0 (Chlorophenols) RN - 0 (DNA, Complementary) RN - 0 (RNA, Messenger) RN - 0 (Water Pollutants, Chemical) RN - D9BSU0SE4T (Pentachlorophenol) RN - EC 1.11.1.9 (Glutathione Peroxidase) RN - MHS8C5BAUZ (2,4,6-trichlorophenol) RN - R669TG1950 (2,4-dichlorophenol) SB - IM MH - Amino Acid Sequence MH - Animals MH - Anodonta/*drug effects/*genetics/metabolism MH - Base Sequence MH - Chlorophenols/toxicity MH - Cloning, Molecular MH - DNA, Complementary/genetics/metabolism MH - Glutathione Peroxidase/chemistry/*genetics/metabolism MH - Pentachlorophenol/toxicity MH - Phylogeny MH - Protein Conformation MH - Protein Structure, Secondary MH - RNA, Messenger/genetics/metabolism MH - Random Allocation MH - Sequence Alignment MH - Water Pollutants, Chemical/*toxicity OTO - NOTNLM OT - 2,4,6-Trichlorophenol OT - 2,4-Dichlorophenol OT - Anodonta woodiana OT - AwSeGPx OT - Pentachlorophenol EDAT- 2016/06/14 06:00 MHDA- 2017/03/03 06:00 CRDT- 2016/06/14 06:00 PHST- 2016/03/10 00:00 [received] PHST- 2016/06/08 00:00 [revised] PHST- 2016/06/08 00:00 [accepted] PHST- 2016/06/14 06:00 [entrez] PHST- 2016/06/14 06:00 [pubmed] PHST- 2017/03/03 06:00 [medline] AID - S1050-4648(16)30372-2 [pii] AID - 10.1016/j.fsi.2016.06.012 [doi] PST - ppublish SO - Fish Shellfish Immunol. 2016 Aug;55:499-509. doi: 10.1016/j.fsi.2016.06.012. Epub 2016 Jun 9.