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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.
Interferons
Interferons (IFNs) are proteins produced by lymphocytes, macrophages, and fibroblasts infected with viruses. While IFNs cannot prevent viruses from entering and...
Clinical Significance of Antibiotic Resistance01:25

Clinical Significance of Antibiotic Resistance

Methicillin-resistant Staphylococcus aureus (MRSA) presents a critical public health threat, arising from its capacity to resist β-lactam antibiotics due to acquisition of the mecA gene within the staphylococcal cassette chromosome mec (SCCmec). This gene encodes penicillin-binding protein 2a (PBP2a), which impairs binding efficacy of methicillin and other β-lactams. MRSA has evolved into distinct clonal lineages impacting humans and animals alike, reinforcing its significance within the One...
Biological Methods for Microbial Control01:28

Biological Methods for Microbial Control

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...
Surface Membrane Barriers01:18

Surface Membrane Barriers

The skin and mucous membranes serve as the primary line of defense against pathogens by providing both physical and chemical protection. These barriers are essential in preventing the entry and establishment of microbes, thereby maintaining the integrity of the host.
The outer layer of the skin, the epidermis, is a robust barrier comprising layers of closely packed keratinized cells. This dense arrangement prevents microbes from penetrating the body. The periodic shedding of epidermal cells...
Gene Regulation in Microbial Communities: Quorum Sensing01:28

Gene Regulation in Microbial Communities: Quorum Sensing

Quorum sensing is a mechanism of bacterial communication that enables coordinated gene expression in response to changes in population density. This facilitates collective behaviors that enhance survival, resource acquisition, and ecological adaptation. This process relies on small signaling molecules called autoinducers that accumulate as bacterial populations grow. When a critical threshold concentration of autoinducers is reached, bacterial cells collectively modify gene expression,...
Inhibitors of Gram-positive Cell Wall Synthesis01:23

Inhibitors of Gram-positive Cell Wall Synthesis

Bacterial cell walls are typically rigid structures composed mainly of peptidoglycan, a mesh-like polymer that provides mechanical strength and maintains cell shape. The synthesis of peptidoglycan is a crucial process in bacterial growth and serves as a primary target for many antibiotics.Mechanism of Action of Beta-Lactam AntibioticsBeta-lactam antibiotics, such as penicillin, inhibit peptidoglycan synthesis in actively growing cells. These antibiotics share a characteristic four-membered...

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Related Experiment Video

Updated: May 11, 2026

Production and Visualization of Bacterial Spheroplasts and Protoplasts to Characterize Antimicrobial Peptide Localization
10:13

Production and Visualization of Bacterial Spheroplasts and Protoplasts to Characterize Antimicrobial Peptide Localization

Published on: August 11, 2018

Antimicrobial peptides from marine sources.

Van L T Hoang1, Se-Kwon Kim

  • 1School of Pharmacy, The University of Queensland, Queensland 4072, Australia.

Current Protein & Peptide Science
|June 1, 2013
PubMed
Summary

Marine environments offer a rich source of novel antimicrobial peptides (AMPs) to combat antibiotic-resistant bacteria. This review highlights recent discoveries and benefits of these marine-derived natural antibiotics.

Area of Science:

  • Marine biology
  • Microbiology
  • Pharmacology

Background:

  • Antibiotic resistance in pathogenic bacteria necessitates the development of new antimicrobial agents.
  • Antimicrobial peptides (AMPs) show broad activity and multiple health benefits, making them promising therapeutic candidates.
  • The marine environment remains underexplored for pharmaceutical compounds, despite its vast organism diversity.

Purpose of the Study:

  • To review recent antimicrobial peptides isolated from marine organisms.
  • To discuss the isolation and benefits of marine-derived natural antibiotics.

Main Methods:

  • Literature review of scientific publications on marine-derived antimicrobial peptides.
  • Analysis of studies reporting the isolation and characterization of AMPs from marine fish and invertebrates.

Related Experiment Videos

Last Updated: May 11, 2026

Production and Visualization of Bacterial Spheroplasts and Protoplasts to Characterize Antimicrobial Peptide Localization
10:13

Production and Visualization of Bacterial Spheroplasts and Protoplasts to Characterize Antimicrobial Peptide Localization

Published on: August 11, 2018

Main Results:

  • Several novel AMPs have been recently isolated from marine fish and invertebrates.
  • These marine-derived AMPs exhibit significant antimicrobial activity against various pathogens.
  • Marine AMPs possess additional beneficial functions for human health.

Conclusions:

  • Marine organisms are a valuable source for discovering novel AMPs.
  • Marine-derived AMPs represent a promising alternative to conventional antibiotics for combating resistance.
  • Further research into marine natural products could yield new therapeutic agents.