کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
2007244 1066368 2009 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A family of kassinatuerin-2 related peptides from the skin secretion of the African hyperoliid frog, Kassina maculata
موضوعات مرتبط
علوم زیستی و بیوفناوری بیوشیمی، ژنتیک و زیست شناسی مولکولی زیست شیمی
پیش نمایش صفحه اول مقاله
A family of kassinatuerin-2 related peptides from the skin secretion of the African hyperoliid frog, Kassina maculata
چکیده انگلیسی
We describe the isolation and structural characterization of a family of antimicrobial peptides related to kassinatuerin-2, from the skin secretion of the African hyperoliid frog, Kassina maculata. All four peptides, designated kassinatuerin-2Ma through Md, are C-terminally-amidated 20-mers with the consensus sequence - FX1GAIAAALPHVIX2AIKNAL - where X1 = L/F/V/I and X2 = S/N. All four peptides are encoded by precursors of 69 amino acids. Synthetic replicates of all kassinatuerin-2 related peptides displayed a potent inhibitory activity against Staphylococcus aureus with a minimal inhibitory concentration of 16 μM, at which concentration, however, they effected 18% haemolysis of horse erythrocytes after 2 h. Despite obvious membranolytic properties, all peptides were ineffective at inhibiting the growth of Escherichia coli at concentrations up to 200 μM and were relatively ineffective against Candida albicans (MIC 120 μM). The kassinatuerin-2 related peptides of K. maculata skin secretion thus possess a discrete antimicrobial and weak haemolytic activity in contrast to the prototype kassinatuerin-2 from the skin secretion of Kassina senegalensis.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Peptides - Volume 30, Issue 8, August 2009, Pages 1428-1433
نویسندگان
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