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Related Concept Videos

Development of Antibiotic Resistance01:30

Development of Antibiotic Resistance

Antibiotic resistance is a major public health concern that arises when bacteria evolve mechanisms to withstand the effects of antibiotic treatments. This resistance can be intrinsic, acquired through genetic mutations, or transferred between bacteria via horizontal gene transfer. The development of antibiotic resistance poses significant challenges in treating bacterial infections and necessitates ongoing research to develop new therapeutic strategies.Intrinsic resistance occurs when bacterial...
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Penicillin, one of the earliest and most widely used antibiotics, is produced industrially by the filamentous fungus Penicillium chrysogenum. Large stirred-tank bioreactors ranging from tens to hundreds of thousands of liters maintain tightly controlled temperature, pH, and dissolved oxygen conditions to support fungal metabolism and maximize antibiotic yield. Penicillin is a secondary metabolite, synthesized primarily during the stationary growth phase, which requires a carefully managed...
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Antimicrobial Peptides Produced by Selective Pressure Incorporation of Non-canonical Amino Acids
11:56

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Published on: May 4, 2018

Lantibiotics: how do producers become self-protected?

Zainab Alkhatib1, André Abts, Antonino Mavaro

  • 1Institute of Biochemistry, Heinrich-Heine-Universität Düsseldorf, Universitätsstrasse 1, 40225 Düsseldorf, Germany.

Journal of Biotechnology
|February 15, 2012
PubMed
Summary

Lantibiotics, like nisin, are bacterial peptides. Immunity proteins protect producer bacteria from lantibiotic activity, with potential medical and industrial applications.

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Area of Science:

  • Microbiology
  • Biochemistry
  • Molecular Biology

Background:

  • Lantibiotics are ribosomally synthesized antimicrobial peptides from Gram-positive bacteria.
  • Nisin, a well-studied lantibiotic, exhibits broad activity against Gram-positive pathogens.
  • Producer strains possess sophisticated immunity systems to prevent self-intoxication.

Purpose of the Study:

  • To review the regulatory mechanisms, biosynthesis, and activity of lantibiotic immunity systems.
  • To explore the potential applications of lantibiotic immunity proteins in medicine and industry.

Main Methods:

  • Review of existing literature on lantibiotic biosynthesis and immunity.
  • Analysis of the genetic organization of lantibiotic operons.
  • Discussion of the functional roles of immunity proteins like NisFEG and NisI.

Main Results:

  • Lantibiotic genes are organized in operons, encoding all necessary components for production and immunity.
  • The nisin immunity system (NisFEG and NisI) effectively neutralizes nisin's activity in Lactococcus lactis.
  • Immunity proteins function by preventing nisin from reaching its cellular targets.

Conclusions:

  • Understanding lantibiotic immunity is crucial for harnessing these compounds effectively.
  • Immunity proteins offer promising avenues for biotechnological and therapeutic applications.
  • Further research into lantibiotic immunity mechanisms can unlock novel antimicrobial strategies.