| Intracellular Cu/Zn superoxide dismutase (Cu/Zn-SOD) from hard clam Meretrix meretrix: its cDNA cloning, mRNA expression and enzyme activity. | |
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MedLine Citation:
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PMID: 23053968 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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Hard clam (Meretrix meretrix) is an economically important bivalve in China. In the present study, a gene coding for an intracellular Cu/Zn-SOD was cloned and characterized from hard clam. The full-length cDNA of this Cu/Zn-SOD (designated as Mm-icCuZn-SOD) consisted of 1,383 bp, with a 462-bp of open reading frame (ORF) encoding 153 amino acids. Several highly conserved motifs, including the Cu/Zn binding sites [H(46), H(48), H(63), and H(119) for Cu binding; H(63), H(71), H(80), and D(83) for Zn binding], an intracellular disulfide bond and two Cu/Zn-SOD signatures were identified in Mm-icCu/Zn-SOD. The deduced amino acid sequence of Mm-icCu/Zn-SOD has a high degree of homology with the Cu/Zn-dependent SODs from other species, indicating that Mm-icCu/Zn-SOD should be a member of the intracellular Cu/Zn-dependent SOD family. Real-time PCR analysis showed that the highest level of Mm-icCu/Zn-SOD expression was in the hepatopancreas, while the lowest level occurred in the hemocytes. Hard clam challenged with Vibrio anguillarum showed a time-dependent increase in Mm-icCu/Zn-SOD expression that reached a maximum level after 6 h. Mm-icCu/Zn-SOD purified as a recombinant protein expressed in E. coli retained a high level of biological activity, 83 % after 10 min incubation at 10-50 °C, and more than 87 % after incubation in buffers with pH values between 2.2 and 10.2. These results indicated that Mm-icCu/Zn-SOD may play an important role in the innate immune system of hard clam. |
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Authors:
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Xianggang Gao; Chongbo He; Hong Liu; Hongjun Li; Dan Zhu; Shengli Cai; Ying Xia; Ying Wang; Zhe Yu |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2012-10-11 |
Journal Detail:
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Title: Molecular biology reports Volume: - ISSN: 1573-4978 ISO Abbreviation: Mol. Biol. Rep. Publication Date: 2012 Oct |
Date Detail:
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Created Date: 2012-10-11 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0403234 Medline TA: Mol Biol Rep Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Affiliation:
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Key Laboratory of Aquatic Genetic Resources and Aqua-cultural Ecosystem Certified by the Ministry of Agriculture, Shanghai Ocean University, Shanghai, 201306, China. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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