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Molecular Characterization and Expression Analysis of a Novel Glutaredoxin 3 Gene in Pacific White Shrimp (Litopenaeus vannamei)

文献类型： 外文期刊

作者： Zheng, Peihua 1 ; Zhang, Xiuxia 2 ; Wang, Dongmei 2 ; Li, Juntao 2 ; Zhang, Zelong 2 ; Lu, Yaopeng 1 ; Xian, Jianan 2 ; W 1 ;

作者机构： 1.South China Normal Univ, Inst Modern Aquaculture Sci & Engn IMASE, Sch Life Sci, Guangdong Prov Key Lab Hlth & Safe Aquaculture, Guangzhou, Peoples R China

2.Chinese Acad Trop Agr Sci, Inst Trop Biosci & Biotechnol, Hainan Prov Key Lab Funct Components Res & Utiliz, Haikou, Hainan, Peoples R China

3.Chinese Acad Trop Agr Sci, Hainan Inst Trop Agr Resources, Haikou, Hainan, Peoples R China

关键词： glutaredoxin; Ammonia-N; LPS; stress; shrimp

期刊名称：FRONTIERS IN MARINE SCIENCE （ 影响因子：4.912； 五年影响因子：5.125 ）

ISSN：

年卷期： 2021 年 8 卷

页码：

收录情况： SCI

摘要： Glutaredoxins (Grxs), small heat-stable oxidoreductases, are key members of the thioredoxin (Trx) superfamily. Recently, an emerging subclass of Grxs with a cysteine residue in the active site was found in shrimps. However, molecular functions of Grx-related proteins in decapods were rarely reported. In this study, a novel full-length Grx 3 (LvGrx 3) complementary DNA (cDNA) was identified in Pacific white shrimp (Litopenaeus vannamei), which had a 975-bp open reading frame (ORF) encoding a polypeptide of 324 amino acids. The nucleic acid sequence of Pacific white shrimp glutaredoxin 3 (LvGrx 3) showed 99.59% identity with genomic DNA (gDNA) sequence and 63.49% coverage. Sequence alignment showed that the amino acid sequence of LvGrx 3 shared 97% identity with black tiger shrimp (Penaeus monodon) Grx 3 and 62% identity with amphipod (Hyalella azteca) Grx 3. LvGrx 3 showed higher expression in the intestine, gill, and hepatopancreas, and lower expression in epithelium and abdominal nerve. In response to ammonia-N stress, LvGrx 3 was significantly upregulated in both the hepatopancreas and gill, and the peak value appeared after 24 h exposure. After lipopolysaccharide (LPS) injection, expression levels of LvGrx 3 in the hepatopancreas were increased in the middle stage, and LvGrx 3 in gill was upregulated in the middle and later periods (24 and 48 h). These results indicate that LvGrx 3 can participate in immune responses against ammonia-N stress and pathogen infection. However, RNA interference (RNAi) assay showed that LvGrx 3 silencing in ammonia-N-challenged shrimp could significantly induce the gene expression of antioxidant enzymes and aggravate the oxidative damage of protein and lipid. These results suggest that LvGrx 3 is involved in regulating the antioxidant system and plays a vital role in defense responses against environmental stress.

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