文献类型： 外文期刊
作者： Ye Xing 1 ; Gao Feng-Ying 1 ; Zheng Qing-Mei 2 ; Bai Jun-Jie 1 ; Wang Huan 1 ; Lao Hai-Hua 1 ; Jian Qing 1 ;
作者机构： 1.Pearl River Fisheries Res Inst, CAFS, Key Lab Trop & Subtrop Fish Breeding & Cultivat, Guangzhou 510380, Guangdong, Peoples R China
2.Jia Ying Coll, Dept Biol, Mei Zhou 514015, Peoples R China
3.Guangdong Ocean Univ, Fishery Coll, Zhanjiang 524025, Peoples R China
期刊名称：MOLECULAR BIOLOGY REPORTS （ 影响因子：2.316； 五年影响因子：2.357 ）
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收录情况： SCI
摘要： Lysozymes are key proteins to invertebrates in the innate immune responses against bacterial infections. A lysozyme gene isolated from tiger shrimp, Penaeus monodon, was cloned, sequenced and characterized. The cDNA consists of a signal peptide of 18 amino acids and a mature peptide of 140 amino acids. The lysozyme is presumed to be a chicken-type lysozyme for it possesses two catalytic sites and eight cysteine residues which are highly conserved across species of chicken-type lysozymes. The lysozyme cDNAs of Penaeus semisulcatus, Litopenaeus vannamei, Macrobrachium nipponense and Macrobrachium rosenbergii were also cloned. High similarities existed among shrimp and prawn lysozymes but phylogenetic relationship of shrimps and prawns based on lysozyme molecules did not quite consistent with traditional taxonomic classification. High mRNA expression was detected in hepatopancreas, haemocytes and gill of tiger shrimp. Recombinant lysozyme exhibited potent lytic activities against fish pathogens providing evidence of the involvement of lysozyme in shrimp immunity.
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