Transcript profiles of mitochondrial and cytoplasmic manganese superoxide dismutases in Exopalaemon carinicauda under ammonia stress

  • Hai Ren (任海)
  • Jian Li (李健)
  • Jitao Li (李吉涛)
  • Ping Liu (刘萍)
  • Zhongxiu Liang (梁忠秀)
  • Jianhua Wu (吴建华)


Superoxide dismutase (SOD) is one of the most important antioxidant defense enzymes, and is considered as the first line against oxidative stress. In this study, we cloned a mitochondrial manganese (Mn) SOD (mMnSOD) cDNA from the ridgetail white prawn Exopalaemon carinicauda by using rapid amplification of cDNA ends (RACE) methods. The full-length cDNA for mMnSOD was 1 014-bp long, containing a 5′-untranslated region (UTR) of 37-bp, a 3′-UTR of 321-bp with a poly (A) tail, and included a 657-bp open reading frame encoding a protein of 218 amino acids with a 16-amino-acid signal peptide. The protein had a calculated molecular weight of 23.87 kDa and a theoretical isoelectric point of 6.75. The mMnSOD sequence included two putative N-glycosylation sites (NHT and NLS), the MnSOD signature sequence 180DVWEHAYY187, and four putative Mn binding sites (H48, H96, D180, and H184). Sequence comparison showed that the mMnSOD deduced amino acid sequence of E. carinicauda shared 97%, 95%, 89%, 84%, 82%, 72%, and 69% identity with that of Macrobrachium rosenbergii, Macrobrachium nipponense, Fenneropeneaus chinensis, Callinectes sapidus, Perisesarma bidens, Danio rerio, and Homo sapiens, resectively. Quantitative real-time RT-PCR analysis showed that mMnSOD transcripts were present in all E. carinicauda tissues examined, with the highest levels in the hepatopancreas. During an ammonia stress treatment, the transcript levels of mMnSOD and cMnSOD were up-regulated at 12 h in hemocytes and at 24 h in the hepatopancreas. As the duration of the ammonia stress treatment extended to 72 h, the transcript levels of mMnSOD and cMnSOD significantly decreased both in hemocytes and hepatopancreas. These findings indicate that the SOD system is induced to respond to acute ammonia stress, and may be involved in environmental stress responses in E. carinicauda.


Exopalaemon carinicauda mitochondrial manganese superoxide dismutase (mMnSODcytosolic manganese superoxide dismutase (cMnSODcloning expression 


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Copyright information

© Chinese Society for Oceanology and Limnology, Science Press and Springer-Verlag Berlin Heidelberg 2015

Authors and Affiliations

  • Hai Ren (任海)
    • 1
    • 2
  • Jian Li (李健)
    • 2
  • Jitao Li (李吉涛)
    • 2
  • Ping Liu (刘萍)
    • 2
  • Zhongxiu Liang (梁忠秀)
    • 2
  • Jianhua Wu (吴建华)
    • 1
  1. 1.Hebei Normal University of Science and TechnologyQinhuangdaoChina
  2. 2.Key Laboratory of Sustainable Development of Marine Fisheries, Ministry of Agriculture, Yellow Sea Fisheries Research InstituteChinese Academy of Fishery SciencesQingdaoChina

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