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ECB-ART-45246
Dev Comp Immunol 2017 Aug 01;73:79-87. doi: 10.1016/j.dci.2017.03.011.
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Microsomal glutathione transferase 1 attenuated ROS-induced lipid peroxidation in Apostichopus japonicus.

Zhang Z , Lv Z , Shao Y , Qiu Q , Zhang W , Duan X , Li Y , Li C .


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Microsomal glutathione transferase (mGST) is a membrane bound glutathione transferase in multifunctional detoxification isoenzymes family and also plays crucial roles in innate immunity. In the present study, a novel microsomal GST homology was identified from Apostichopus japonicus (designated as AjmGST1) by RACE approaches. The full-length cDNA of AjmGST1 was of 1296 bp encoded a protein of 169 amino acids residues. Multiple sequence alignment and phylogenetic analysis together supported that AjmGST1 belonged to a new member in invertebrates mGST family. Spatial expression analysis revealed that AjmGST1was ubiquitously expressed in all examined tissues with the larger magnitude in tentacle. Time-course expression of AjmGST1 mRNA in coelomocytes was up-regulated after Vibrio splendidus challenge from 6 h until 72 h with the peak expression in 24 h, compared with that in the control group. Similarly, the induced expression of AjmGST1 expression was also detected in lipopolysaccharide (LPS) exposed primary coelomocytes. The purified recombinant protein of AjmGST1 showed high activity with GST substrate at pH of 7.0 and temperature of 35 °C. Meantime, the recombinant AjmGST1 depressed H2O2-induced MDA production both in vivo and in vitro. All of these results indicated that AjmGST1 was an important regulator in elimination of lipid peroxidation under immune response.

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Genes referenced: LOC594349 lpcat3 ros1