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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/26743

Title: Molecular Cloning and Characterization of cDNA of Penaeidin-like Antimicrobial Peptide from Tiger Shrimp (Penaeus monodon)
Authors: Tze-Ting Chiou;Jen-Leih Wu;Thomas T. Chen;Jenn-Kan Lu
Contributors: NTOU:Department of Aquaculture
Keywords: Penaeus monodon;shrimp;peneidin;like antimicrobial peptides;innate immunity
Date: 2005-03
Issue Date: 2011-10-21T02:18:29Z
Publisher: Marine Biotechnology
Abstract: Abstract:We report the molecular cloning and characterization of a penaeidin-like antimicrobial peptide (AMP) complementary DNA from the hemocytes of tiger shrimp (Penaeus monodon). A tiger shrimp AMP cDNA containing the entire coding region of the peptide, determined by rapid amplification of cDNA 5¢ and 3¢ ends and polymerase chain reaction of the messenger RNA isolated from hemocytes of the shrimp, is 683 bp in length with an open reading frame of 222 bp. The deduced amino acid sequence of this antimicrobial peptide consists of 55 amino acid
residues of the mature peptide and a signal peptide of 19 amino acid residues. The mature peptide contains a proline-rich domain at the N terminus and 6 cysteine residues at the C terminus, and it shares less than 50% amino acid sequence identity with the mature penaeidins of Litopenaeus vannamei. To demonstrate the bactericidal activity of this peptide, a synthetic peptide was prepared according to the
amino acid sequence deduced from the cDNA of tiger
shrimp penaeidin-like AMP. By the minimal inhibitory concentration MIC assay, the synthetic
peptide was shown to exert bactericidal activity
against Escherichia coli, Vibrio harveyi, Vibrio alginolyticus, and Aerococcus viridans. It also inhibited the growth of 2 filamentous fungi, Fusarium pisi and Fusarium oxysporum. Tiger shrimp penaeidin-like AMP mRNA was detected in hemocytes, gills, intestines, eyestalks, hepatopancreas, and muscles of the tiger shrimp by reverse transcriptase–polymerase chain reaction assay. Although the highest level was detected in hemocytes, challenging tiger shrimp with V. harveyi did not result in a significant increase of the mRNA level in hemocytes.
Relation: 7(2), pp.119-127
URI: http://ntour.ntou.edu.tw/handle/987654321/26743
Appears in Collections:[水產養殖學系] 期刊論文

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