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Glutaredoxin 2 in the mud crab Scylla paramamosain: Identification and functional characterization under hypoxia and pathogen challenge. | LitMetric

Glutaredoxin 2 in the mud crab Scylla paramamosain: Identification and functional characterization under hypoxia and pathogen challenge.

Dev Comp Immunol

Key Laboratory of South China Sea Fishery Resources Exploitation & Utilization, Ministry of Agriculture and Rural Affairs, South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, Guangdong, 510300, China. Electronic address:

Published: June 2023

AI Article Synopsis

  • Glutaredoxin (Grx) is an important antioxidant enzyme, and a new gene called SpGrx2 was discovered in the mud crab Scylla paramamosain, showing a specific structure and protein domain.
  • The expression of SpGrx2 is highest in the gill, and its levels increase in response to infections and low oxygen environments, indicating its role in stress response.
  • Silencing SpGrx2 reduced the expression of antioxidant genes after hypoxia, while overexpressing it boosted antioxidant capacity in Drosophila cells, suggesting SpGrx2's key role in combating oxidative stress in crabs.

Article Abstract

Glutaredoxin (Grx) is a glutathione-dependent oxidoreductase that plays a key role in antioxidant defense. In this study, a novel Grx2 gene (SpGrx2) was identified from the mud crab Scylla paramamosain, which consists of a 196 bp 5' untranslated region, a 357 bp open reading frame, and a 964 bp 3' untranslated region. The putative SpGrx2 protein has a typical single Grx domain with the active center sequence C-P-Y-C. The expression analysis revealed that the SpGrx2 mRNA was most abundant in the gill, followed by the stomach and hemocytes. Both mud crab dicistrovirus-1 and Vibrioparahaemolyticus infection as well as hypoxia could differentially induce the expression of SpGrx2. Furthermore, silencing SpGrx2 in vivo affected the expression of a series of antioxidant-related genes after hypoxia treatment. Additionally, SpGrx2 overexpression significantly increased the total antioxidant capacity of Drosophila Schneider 2 cells after hypoxia, resulting in a reduction of reactive oxygen species and malondialdehyde content. The subcellular localization results indicated that SpGrx2 was localized in both the cytoplasm and the nucleus of Drosophila Schneider 2 cells. These results indicate that SpGrx2 plays a crucial role as an antioxidant enzyme in the defense system of mud crabs against hypoxia and pathogen challenge.

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Source
http://dx.doi.org/10.1016/j.dci.2023.104676DOI Listing

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