National Taiwan Ocean University Institutional Repository:Item 987654321/26730
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题名: Molecular cloning and characterisation of copper/zinc superoxide dismutase (Cu,Zn-SOD) from the giant freshwater prawn Macrobrachium rosenbergii
作者: Winton Cheng;Ying-Hsiu Tung;Chun-Hung Liu;Jiann-Chu Chen
贡献者: NTOU:Department of Aquaculture
國立臺灣海洋大學:水產養殖學系
关键词: Copper/zinc superoxide dismutase (Cu,Zn-SOD);Macrobrachium rosenbergii;Haemocyte;Hepatopancreas;Real-time RT–PCR;Lactococcus garvieae injection
日期: 2006-07
上传时间: 2011-10-21T02:18:27Z
出版者: Fish & Shellfish Immunology
摘要: Abstract:A copper/zinc superoxide dismutase (Cu,Zn-SOD) cDNA was cloned from the hepatopancreas of giant freshwater prawn Macrobrachium rosenbergii using reverse transcription–polymerase chain reaction (RT–PCR) by degenerate primers. Both 3′- and 5′-regions were isolated by the rapid amplification of cDNA ends method. Analysis of nucleotide sequence revealed that the Cu,Zn-SOD cDNA clone consists of 845 bp with an open reading frame of 603 bp encoding a protein of 201 amino acids with a 22 amino acid signal peptide. The calculated molecular mass of the mature proteins (179 amino acids) is 21 kDa with an estimated pI of 4.75. Two putative N-glycosylation sites, NXT and NXS, were observed in the Cu,Zn-SOD. Four conserved amino acids responsible for binding copper (H86, H89, H106 and H163) and four conserved amino acids responsible for binding zinc (H106, H114, H123 and D126) were observed. Sequence comparison showed that the Cu,Zn-SOD deduced amino acid sequence of M. rosenbergii has similarity of 60% and 64% to that of freshwater crayfish Pacifastacus leniusculus ecCu,Zn-SOD and blue crab Callinectes sapidus ecCu,Zn-SOD, respectively. Quantitative real-time RT–PCR analysis showed that Cu,Zn-SOD transcripts in haemocytes of M. rosenbergii increased 3 h and 6 h after injection of Lactococcus garvieae, whereas Cu,Zn-SOD transcripts decreased in the hepatopancreas 3 h after L. garvieae injection.
關聯: 21(1), pp.102-112
URI: http://ntour.ntou.edu.tw/handle/987654321/26730
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