A Novel Antimicrobial Peptide from Skin Secretionsof the Tree Frog Theloderma kwangsiensis

被引:4
作者
Yan, Hongli [1 ]
Liu, Yingying [3 ]
Tang, Jing [1 ]
Mo, Guoxiang [1 ]
Song, Yuzhu [2 ]
Yan, Xiuwen [1 ]
Wei, Lin [1 ]
Lai, Ren [1 ]
机构
[1] Nanjing Agr Univ, Life Sci Coll, Nanjing 210095, Jiangsu, Peoples R China
[2] Kunming Univ Sci & Technol, Life Sci & Technol Coll, Kunming 650093, Yunnan, Peoples R China
[3] 3 People Hosp Yunnan Prov, Dept Endocrinol, Kunming 650011, Peoples R China
关键词
Amphibia; antimicrobial peptide; tree frog; skin secretion; Theloderma kwangsiensis; FAMILIES; SEQUENCE;
D O I
10.2108/zsj.30.704
中图分类号
Q95 [动物学];
学科分类号
071002 ;
摘要
Most of amphibians belonging to family Rhacophoridae live in arboreal habitats. A large number of antimicrobial peptides (AMPs) have been identified from amphibian skins. No antimicrobial peptide from Rhacophoridae amphibians has been reported. In this study, we purified and characterized a novel antimicrobial peptide, pleurain-a1-thel from skin secretions of the tree frog, Theloderma kwangsiensis. Its amino acid sequence was determined as RILTMTKRVKMPQLYKQIVCRLFKTC by Edman degradation, mass spectrometry analysis and cDNA cloning. There are two cysteines, which form an intra-molecular disulfide bridge, in the sequence of pleurain-a1-thel. Pleurain-a1-thel exerted potential antimicrobial activities against wide spectrum of microorganisms, including Gram-negative and -positive bacteria and fungi. It exerted little hemolytic activity in human or rabbit red cells. To the best of our knowledge, this is the first report of antimicrobial peptide from Rhacophoridae amphibians.
引用
收藏
页码:704 / 709
页数:6
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