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Bacteriophages, also known as phages, are specialized viruses that infect bacteria. A key characteristic of phages is their distinctive “head-tail” morphology. A phage begins the infection process (i.e., lytic cycle) by attaching to the outside of a bacterial cell. Attachment is accomplished via proteins in the phage tail that bind to specific receptor proteins on the outer surface of the bacterium. The tail injects the phage’s DNA genome into the bacterial cytoplasm. In the...
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Bacillus sp.: A Remarkable Source of Bioactive Lipopeptides.

A Théatre1, A C R Hoste1, A Rigolet1

  • 1MiPI, TERRA Teaching and Research Centre, Joint Research Unit BioEcoAgro, UMRt 1158, Gembloux Agro-Bio Tech, University of Liège, Gembloux, Belgium.

Advances in Biochemical Engineering/Biotechnology
|March 16, 2022
PubMed
Summary

Bacillus species produce diverse bioactive lipopeptides, including surfactin, fengycin, and iturin, through nonribosomal peptide synthetases. Genetic engineering can enhance lipopeptide biodiversity, production, and purification for novel applications.

Keywords:
ApplicationBacillusBioactivityBiodiversityGenetic engineeringLipopeptideNRPSPhysicochemical properties

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Area of Science:

  • Microbiology
  • Biochemistry
  • Synthetic Biology

Background:

  • Bacillus species are prolific producers of bioactive lipopeptides, with surfactin being a prime example.
  • Lipopeptides from Bacillus are classified into three main families: surfactin, fengycin, and iturin.
  • Natural biodiversity in lipopeptide structure arises from variations in peptide and fatty acid chains.

Purpose of the Study:

  • To describe the synthesis and biodiversity of lipopeptides produced by Bacillus species.
  • To explore methods for increasing lipopeptide biodiversity through genetic engineering.
  • To outline strategies for overproduction and purification of these lipopeptides.

Main Methods:

  • Review of existing literature on Bacillus lipopeptide biosynthesis.
  • Discussion of nonribosomal peptide synthetases (NRPS) in lipopeptide synthesis.
  • Overview of genetic engineering techniques for lipopeptide modification.

Main Results:

  • Identification of three major lipopeptide families (surfactin, fengycin, iturin) from Bacillus.
  • Elucidation of the role of nonribosomal peptide synthetases in generating peptide diversity.
  • Highlighting the diversity of fatty acid chains contributing to lipopeptide variability.
  • Demonstration of potential for enhanced lipopeptide production and purification.

Conclusions:

  • Understanding Bacillus lipopeptide biosynthesis is key to unlocking novel compounds.
  • Genetic engineering offers a powerful tool to expand lipopeptide biodiversity and properties.
  • Diverse lipopeptides possess a wide range of biological activities and applications across sectors.