The cytosolic manganese superoxide dismutase from the shrimp Litopenaeus vannamei: molecular cloning and expression.
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 1h post-infection and then decrease as the viral infection progressed to levels significantly lower than uninfected controls by 12h post-infection.
Gómez-Anduro
Gracia A
GA
Aquatic Molecular Biology Laboratory, Centro de Investigación en Alimentación y Desarrollo, A.C., PO Box 1735, Hermosillo, Son 83000, México.
Barillas-Mury
Carolina-V
CV
Peregrino-Uriarte
Alma B
AB
Gupta
Lalita
L
Gollas-Galván
Teresa
T
Hernández-López
Jorge
J
Yepiz-Plascencia
Gloria
G
D000595:Amino Acid Sequence; D000818:Animals; D001483:Base Sequence; D003001:Cloning, Molecular; D003600:Cytosol / Q000201:enzymology* / Q000821:virology; D004266:DNA Virus Infections / Q000201:enzymology; D018076:DNA, Complementary / Q000302:isolation & purification; D008969:Molecular Sequence Data; D033561:Penaeidae / Q000201:enzymology* / Q000821:virology; D013482:Superoxide Dismutase / Q000096:biosynthesis* / Q000235:genetics* / Q000302:isolation & purification; D046848:White spot syndrome virus 1 / Q000502:physiology
D018076:DNA, Complementary; D013482:Superoxide Dismutase