Journal
DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY
Volume 30, Issue 10, Pages 893-900Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.dci.2006.01.002
Keywords
antioxidant; cytoplasmic MnSOD; cDNA; expression; WSSV
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Funding
- NATIONAL INSTITUTE OF ALLERGY AND INFECTIOUS DISEASES [Z01AI000947, ZIAAI000947] Funding Source: NIH RePORTER
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Manganese containing superoxide dismutase (SOD) is normally a nuclear-encoded mitochondrial enzyme in eukaryotic organisms; however, a cytoplasmic manganese SOD (cMnSOD) was found in crustaceans that use hemocyanin as oxygen carrier. The complete cDNA and deduced amino acid sequence of a cMnSOD from Litopenaeus vannamei were determined. The coding sequence predicts a 287 residues protein with a unique 61 amino acids extension at the N-terminus and lacking a mitochondrial-targeting sequence. Phylogenetic analysis clusters cMnSODs and mitochondrial MnSODs in two separate groups. cMnSOD transcripts were detected in hemocytes, heart, hepatopancreas, intestine, nervous system, muscle. pleopods and gills. Since hemocytes are key defense cells and their reactions produce superoxide radicals, the infection by white spot syndrome virus on the cMnSOD transcript levels were investigated and found to increase transiently 1 h post-infection and then decrease as the viral infection progressed to levels significantly lower than uninfected controls by 12 h post-infection. (c) 2006 Elsevier Ltd. All rights reserved.
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