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Related Concept Videos

Antimicrobial Proteins01:23

Antimicrobial Proteins

Antimicrobial proteins are important components of the immune system. They aid the body in combating pathogens by either killing them directly or hindering their replication processes. Four main types of antimicrobial substances are interferons, the complement system, iron-binding proteins, and antimicrobial proteins.
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Transduction01:16

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Among the three main modes of HGT—transformation, conjugation, and transduction—transduction is unique in that it is mediated by bacteriophages, or bacterial viruses.Transduction occurs in two ways. Generalized transduction occurs during the lytic cycle of a bacteriophage infection. In this process, bacteriophages infect bacterial cells, replicate within them, and ultimately cause cell lysis, releasing newly assembled virions. Occasionally, random fragments of the bacterial genome are...
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Biological agents offer an effective means of controlling microbial growth by leveraging natural processes like predation, competition, and the secretion of antimicrobial substances.Predatory bacteria such as Bdellovibrio species target and kill pathogens like Salmonella and E. coli. They are widely used in poultry farms to control infections. Myxococcus species help combat plant-pathogenic fungi. These naturally occurring predators serve as eco-friendly alternatives to chemical pesticides and...
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Updated: May 7, 2026

Antimicrobial Peptides Produced by Selective Pressure Incorporation of Non-canonical Amino Acids
11:56

Antimicrobial Peptides Produced by Selective Pressure Incorporation of Non-canonical Amino Acids

Published on: May 4, 2018

Antimicrobial peptides design by evolutionary multiobjective optimization.

Giuseppe Maccari1, Mariagrazia Di Luca, Riccardo Nifosí

  • 1Center for Nanotechnology Innovation @NEST, Istituto Italiano di Tecnologia, Pisa, Italy.

Plos Computational Biology
|September 17, 2013
PubMed
Summary
This summary is machine-generated.

Researchers designed novel antimicrobial peptides (AMPs) using computational methods and non-natural amino acids. This approach enhances therapeutic potential by increasing activity and overcoming resistance, paving the way for new antimicrobial drug development.

Related Experiment Videos

Last Updated: May 7, 2026

Antimicrobial Peptides Produced by Selective Pressure Incorporation of Non-canonical Amino Acids
11:56

Antimicrobial Peptides Produced by Selective Pressure Incorporation of Non-canonical Amino Acids

Published on: May 4, 2018

Area of Science:

  • Biochemistry and Molecular Biology
  • Computational Chemistry
  • Drug Discovery

Background:

  • Antimicrobial peptides (AMPs) are crucial components of innate immunity, exhibiting broad-spectrum activity and low resistance induction.
  • Linear alpha-helical AMPs are common, effective membrane-disruptive agents in nature.
  • Therapeutic application of AMPs is limited by host resistance and short compound half-life.

Purpose of the Study:

  • To computationally design novel antimicrobial peptide sequences incorporating non-natural amino acids.
  • To enhance the antimicrobial activity and stability of existing AMPs.
  • To validate the efficacy of computationally designed AMPs through experimental synthesis and testing.

Main Methods:

  • Utilized a computational approach based on chemophysical profiles and Quantitative Structure-Activity Relationship (QSAR) descriptors.
  • Employed a multi-objective evolutionary algorithm with statistical models as fitness functions.
  • Synthesized and experimentally validated ab-initio natural peptides, control peptides, and designed peptides with non-natural amino acids.

Main Results:

  • Successfully designed novel AMP sequences with potential for enhanced antimicrobial activity.
  • Optimized a known AMP (CM18) by shortening the sequence while retaining efficacy.
  • Demonstrated superior antimicrobial activity in a designed peptide containing non-natural amino acids compared to natural counterparts.

Conclusions:

  • Computational design incorporating non-natural amino acids is a viable strategy for developing potent AMPs.
  • Non-natural amino acids are key to overcoming host resistance and improving the therapeutic profile of AMPs.
  • This approach offers a promising avenue for the development of next-generation antimicrobial therapeutics.