Kassinatuerin-1: a peptide with broad-spectrum antimicrobial activity isolated from the skin of the hyperoliid frog, Kassina senegalensis |
| |
Authors: | Mattute B Knoop F C Conlon J M |
| |
Institution: | Department of Biomedical Sciences, Creighton University Medical School, Omaha, Nebraska 68178, USA. |
| |
Abstract: | Kassinatuerin-1 (GFMKYIGPLI(10)PHAVKAISDL(20)I.NH(2)) was isolated in high yield (75 nmol/g) from an extract of the skin of a Hyperoliid frog, the African running frog Kassina senegalensis and its sequence was confirmed by total synthesis. The peptide inhibited growth of the gram-negative bacterium Escherichia coli (minimum inhibitory concentration, MIC = 4 microM), the gram-positive bacterium Staphylococcus aureus (MIC = 8 microM), and the yeast Candida albicans (MIC = 70 microM). A structurally related peptide, kassinatuerin-2 (FIQYLAPLI(10)PHAVKAISDL(20)I.NH(2)) was also isolated in high yield (96 nmol/g) from the extract but was devoid of antimicrobial activity against these microrganisms. Kassinatuerin-1 may be classified with other linear, cationic antimicrobial peptides that can potentially adopt an amphipathic alpha-helical conformation but it contains almost no amino acid sequence identity with previously characterized bioactive peptides from frog skin. |
| |
Keywords: | |
本文献已被 PubMed 等数据库收录! |
|