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Abstract
Resistance to antibiotics is becoming a very serious problem, with so-called superbugs exhibiting resistance to nearly all conventional antibiotic drugs. Consequently, these organisms often cause severe illness and even death. Alternatives to conventional antibiotics are antimicrobial peptides (AMPs). These widely expressed short peptides, which have been isolated from insects, plants, marine organisms and mammals, including humans, show strong antimicrobial activity against both Gram-negative and Gram-positive bacteria. Most AMPs act by disrupting the bacterial membrane through “Barrel-stave”, “Toroidal pore”, “carpet” mechanism. In addition, AMPs may prevent septic shock through strongly binding lipopolysaccharides and lipoteichoic acid located on the bacterial membrane. The action mechanisms of AMP to minimize the likelihood developing resistance to the peptides would be particular advantage. For these reasons, we anticipate that AMPs will replace conventional antibiotic drugs in a variety of contexts.
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Figure 2.
Binding affinity of antimicrobial peptide on the lipopolysaccharides (LPS) and lipoteichoic acid (LTA) in membranes of Gram negative and Gram-positive bacteria.
Table 1.
Characterization, activity, and mechanism of antimicrobial peptides.
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